NEWS

    cancelled while the origin cluster was down.
 -- Fix accessing variable outside of lock.
 -- slurm.spec: move libpmi to a separate package to solve a conflict with the
    version provided by PMIx. This will require a separate change to PMIx as
    well.
 -- X11 forwarding: change xauth handling to use hostname/unix:display format,
    rather than localhost:display.
 -- mpi/pmix - Fix warning if not compiling with debug.

* Changes in Slurm 17.11.0
==========================
 -- Fix documentation for MaxQueryTimeRange option in slurmdbd.conf.
 -- Avoid srun abort trying to run on heterogeneous job component that has
    ended.
 -- Add SLURM_PACK_JOB_ID,SLURM_PACK_JOB_OFFSET to PrologSlurmctld and
    EpilogSlurmctld environment.
 -- Treat ":" in #SBATCH arguments as fatal error. The "#SBATCH packjob" syntax
    must be used instead.
 -- job_submit/lua plugin: expose pack_job fields to get.
 -- Prevent scheduling deadlock with multiple components of heterogeneous job
    in different partitions (i.e. one heterogeneous job component is higher
    priority in one partition and another component is lower priority in a
    different partition).
 -- Fix for heterogeneous job starvation bug.
 -- Fix some slurmctld memory leaks.
 -- Add SLURM_PACK_JOB_NODELIST to PrologSlurmctld and EpilogSlurmctld
    environment.
 -- If PrologSlurmctld fails for pack job leader then requeue or kill all
    components of the job.
 -- Fix for mulitple --pack-group srun arguments given out of order.
 -- Update slurm.conf(5) man page with updated example logrotate script.
 -- Add SchedulerParameters=whole_pack configuration parameter. If set, then
    hold, release and cancel operations on any component of a heterogeneous job
    will be applied to all components
 -- Handle FQDNs in xauth cookies for x11 display forwarding properly.
 -- For heterogeneous job steps, the srun --open-mode option default value will
    be set to "append".
 -- Pack job scheduling list not being cleared between runs of the backfill
    scheduler resulted in various anomalies.
 -- Fix that backward compat for pmix version < 1.1.5.
 -- Fix use-after-free that can lead to slurmstepd segfaulting when setting
    ulimit values.
 -- Add heterogeneous job start data to sdiag output.
 -- X11 forwarding - handle systems with X11UseLocalhost=no set in sshd_config.
 -- Fix potential missing issue with missin symbols in gres plugins.
 -- Ignore querying clusters in federation that are down from status commands.
 -- Base federated jobs off of origin job and not the local cluster in API.
 -- Remove erroneous double '-' on rpath for libslurmfull.
 -- Remove version from libslurmfull and move it to $LIBDIR/slurm since the ABI
    could change from one version to the other.
 -- Fix unused wall time for reservations.
 -- Convert old reservation records to insert unused wall into the rows.
 -- slurm.spec: further restructing and improvements.
 -- Allow nodes state to be updated between FAIL and DRAIN.
 -- x11 forwarding: handle build with alternate location for libssh2.

* Changes in Slurm 17.11.0rc3
==============================
 -- Fix extern step to wait until launched before allowing job to start.
 -- Add missing locks around figuring out TRES when clean starting the
    slurmctld.
 -- Cray modulefile: avoid removing /usr/bin from path on module unload.
 -- Make reoccurring reservations show up in the database.
 -- Adjust related resources (cpus, tasks, gres, mem, etc.) when updating
    NumNodes with scontrol.
 -- Don't initialize MPI plugins for batch or extern steps.`
 -- slurm.spec - do not install a slurm.conf file under /etc/ld.so.conf.d.
 -- X11 forwarding - fix keepalive message generation code.
 -- If heterogeneous job step is unable to acquire MPI reserved ports then
    avoid referencing NULL pointer. Retry assigning ports ONLY for
    non-heterogeneous job steps.
 -- If any acct_gather_*_init fails fatal instead of error and keep going.
 -- launch/slurm plugin - Avoid using global variable for heterogeneous job
    steps, which could corrupt memory.

* Changes in Slurm 17.11.0rc2
==============================
 -- Prevent slurmctld abort with NodeFeatures=knl_cray and non-KNL nodes lacking
    any configured features.
 -- The --cpu_bind and --mem_bind options have been renamed to --cpu-bind
    and --mem-bind for consistency with the rest of Slurm's options. Both
    old and new syntaxes are supported for now.
 -- Add slurmdb_connection_commit to the slurmdb api to commit when needed.
 -- Add the federation api's to the slurmdb.h file.
 -- Add job functions to the db_api.
 -- Fix sacct to always use the db_api instead of sometimes calling functions
    directly.
 -- Fix sacctmgr to always use the db_api instead of sometimes calling functions
    directly.
 -- Fix sreport to always use the db_api instead of sometimes calling functions
    directly.
 -- Make global uid to the db_api to minimize calls to getuid().
 -- Add support for HWLOC version 2.0.
 -- Added more validation logic for updates to node features.
 -- Added node_features_p_node_update_valid() function to node_features plugin.
 -- If a job is held due to bad constraints and a node's features change then
    test the job again to see if can run with the new features.
 -- Added node_features_p_changible_feature() function to node_features plugin.
 -- Avoid rebooting a node if a job's requested feature is not under the control
    of the node_features plugin and is not currently active.
 -- node_features/knl_generic plugin: Do not clear a node's non-KNL features
    specified in slurm.conf.
 -- Added SchedulerParameters configuration option "disable_hetero_steps" to
    disable job steps that span multiple components of a heterogeneous job.
    Disabled by default except with mpi/none plugin. This limitation to be
    removed in Slurm version 18.08.

* Changes in Slurm 17.11.0rc1
==============================
 -- Added the following jobcomp/script environment variables: CLUSTER,
    DEPENDENCY, DERIVED_EC, EXITCODE, GROUPNAME, QOS, RESERVATION, USERNAME.
    The format of LIMIT (job time limit) has been modified to D-HH:MM:SS.
 -- Fix QOS usage factor applying to individual TRES run minute usage.
 -- Print numbers using exponential format if required to fit in allocated
    field width. The sacctmgr and sshare commands are impacted.
 -- Make it so a backup DBD doesn't attempt to create database tables and
    relies on the primary to do so.
 -- By default have Slurm dynamically link to libslurm.so instead of static
    linking.  If static linking is desired configure with
    --without-shared-libslurm.
 -- Change --workdir in sbatch to be --chdir as in all other commands (salloc,
    srun).
 -- Add WorkDir to the job record in the database.
 -- Make the UsageFactor of a QOS work when a qos has the nodecay flag.
 -- Add MaxQueryTimeRange option to slurmdbd.conf to limit accounting query
    ranges when fetching job records.
 -- Add LaunchParameters=batch_step_set_cpu_freq to allow the setting of the cpu
    frequency on the batch step.
 -- CRAY - Fix statically linked applications to CRAY's PMI.
 -- Fix - Raise an error back to the user when trying to update currently
    unsupported core-based reservations.
 -- Do not print TmpDisk space as part of 'slurmd -C' line.
 -- Fix to test MaxMemPerCPU/Node partition limits when scheduling, previously
    only checked on submit.
 -- Work for heterogeneous job support (complete solution in v17.11):
    * Set SLURM_PROCID environment variable to reflect global task rank (needed
      by MPI).
    * Set SLURM_NTASKS environment variable to reflect global task count (needed
      by MPI).
    * In srun, if only some steps are allocated and one step allocation fails,
      then delete all allocated steps.
    * Get SPANK plungins working with heterogeneous jobs. The
      spank_init_post_opt() function is executed once per job component.
    * Modify sbcast command and srun's --bcast option to support heterogeneous
      jobs.
    * Set more environment variables for MPI: SLURM_GTIDS and SLURM_NODEID.
    * Prevent a heterogeneous job allocation from including the same nodes in
      multiple components (required by MPI jobs spanning components).
    * Modify step create logic so that call components of a heterogeneous job
      launched by a single srun command have the same step ID value.
 -- Modify output of "--mpi=list" to avoid duplicates for version numbers in
    mpi/pmix plugin names.
 -- Allow nodes to be rebooted while in a maintenance reservation.
 -- Show nodes as down even when nodes are in a maintenance reservation.
 -- Harden the slurmctld HA stack to mitigate certain split-brain issues.
 -- Work for heterogeneous job support (complete solution in v17.11):
    * Add burst buffer support.
    * Remove srun's --mpi-combine option (always combined).
    * Add SchedulerParameters configuration option "enable_hetero_steps" to
      enable job steps that span multiple components of a heterogeneous job.
      Disabled by default as most MPI implementations and Slurm configurations
      are not currently supported. Limitation to be removed in Slurm version
      18.08.
    * Synchronize application launch across multiple components with debugger.
    * Modify slurm_kill_job_step() to cancel all components of a heterogeneous
      job step (used by MPI).
    * Set SLURM_JOB_NUM_NODES environment variable as needed by MVAPICH.
    * Base time limit upon the time that the latest job component is available
      (after all nodes in all components booted and ready for use).
 -- Add cluster name to smail tool email header.
 -- Speedup arbitrary distribution algorithm.
 -- Modify "srun --mpi=list" output to match valid option input by removing the
    "mpi/" prefix on each line of output.
 -- Automatically set the reservation's partition for the job if not the
    cluster default.
 -- mpi/pmi2 plugin - vestigial pointer could be referenced at shutdown with
    invalid memory reference resulting.
 -- Fix to _is_gres_cnt_zero() return false for improper input string
 -- Cleanup all pthread_create calls and replace with new slurm_thread_create
    macro.
 -- Removed obsolete MPI plugins. Remaining options are openmpi, pmi2, pmix.
 -- Removed obsolete checkpoint/poe plugin.
 -- Process spank environment variable options before processing spank command
    line options. Spank plugins should be able to handle option callbacks being
    called multiple times.
 -- Add support for specialized cores with task/affinity plugin (previously
    only supported with task/cgroup plugin).
 -- Add "TaskPluginParam=SlurmdOffSpec" option that will prevent the Slurm
    compute node daemons (slurmd and slurmstepd) from executing on specialized
    cores.
 -- CRAY - Make native mode default, use --disable-native-cray to use ALPS
    instead of native Slurm.
 -- Add ability to prevent suspension of some count of nodes in a specified
    range using the SuspendExcNodes configuration parameter.
 -- Add SLURM_WCKEY to PrologSlurmctld and EpilogSlurmctld  environment.
 -- Return user response string in response to successful job allocation request
    not only on failure. Set in LUA using function 'slurm.user_msg("STRING")'.
 -- Add 'scontrol write batch_script <jobid>' command to retrieve the batch
    script for a given job.
 -- Remove option to display the batch script as part of 'scontrol show job'.
 -- On native Cray system the configured RebootProgram is executed on on the
    head node by the slurmctld daemon rather than by the slurmd daemons on the
    compute nodes. The "capmc_resume" program from "contribs/cray" can be used.
 -- Modify "scontrol top" command to accept a comma separated list of job IDs
    as an argument rather than a single job ID.
 -- Add MemorySwappiness value to cgroup.conf.
 -- Add new "billing" TRES which allows jobs to be limited based on the job's
    billable TRES calculated by the job's partition's TRESBillingWeights.
 -- sbatch - force line-buffered output so 'sbatch -W' returns the jobid
    over a piped output immediately.
 -- Regular user use of "scontrol top" command is now diabled. Use the
    configuration parameter "SchedulerParameters=enable_user_top" to enable
    that functionality. The configuration parameter
    "SchedulerParameters=disable_user_top" will be silently ignored.
 -- Add -TALL to sreport.
 -- Removed unused SlurmdPlugstack option and associated framework.
 -- Correct logic for line continuation in srun --multi-prog file.
 -- Add DBD Agent queue size to sdiag output.
 -- Add running job count to sdiag output.
 -- Print unix timestamps next to ASCII timestamps in sdiag output.
 -- In a job allocation spanning KNL and non-KNL nodes and requiring a reboot,
    do not attempt to set default NUMA or MCDRAM modes on non-KNL nodes.
 -- Change default to let pending jobs run outside of reservation after
    reservation is gone to put jobs in held state. Added NO_HOLD_JOBS_AFTER_END
    reservation flag to use old default.
 -- When creating a reservation, validate the CoreCnt specification matches
    the number of nodes listed.
 -- When creating a reservation, correct logic to ignoring job allocations on
    request.
 -- Deprecate BLCR plugin, and do not build by default.
 -- Change sreport report titles from "Use" to "Usage"

* Changes in Slurm 17.11.0pre2
==============================
 -- Initial work for heterogeneous job support (complete solution in v17.11):
    * Modified salloc, sbatch and srun commands to parse command line, job
      script and environment variables to recognize requests for heterogeneous
      jobs. Same commands also modified to set environment variables describing
      each component of the heterogeneous job.
    * Modified job allocate, batch job submit and job "will-run" requests to
      pass a list of job specifications and get a list of responses.
    * Modify slurmctld daemon to process a heterogeneous job request and create
      multiple job records as needed.
    * Added new fields to job record: pack_job_id, pack_job_offset and
      pack_job_set (set of job IDs). Added to slurmctld state save/restore
      logic and job information reported.
    * Display new job fields in "scontrol show job" output.
    * Modify squeue command to display heterogeneous job records using "#+#"
      format. The squeue --job=# output lists all components of a heterogeneous
      job.
    * Modify scancel logic to cancel all components of a heterogeneous job with
      a single request/RPC.
    * Configuration parameter DebugFlags value of "HeteroJobs" added.
    * Job requeue and suspend/resume modified to operate on all components of
      a heterogeneous job with a single request/RPC.
    * New web page added to describe heterogeneous jobs.
    * Descriptions of new API added to man pages.
    * Modified email notifications to only operate on the first job component.
    * Purge heterogeneous job records at the same time and not by individual
      components.
    * Modified logic for heterogeneous jobs submitted to multiple clusters
      ("--clusters=...") so the job will be routed to the cluster that is
      expected to start all components earliest.
    * Modified srun to create multiple job steps for heterogeneous job
      allocations.
    * Modified launch plugin to accept a pointer to job step options structure
      rather than work from a single/common data structure.
 -- Improve backfill scheduling algorithm with respect to starting jobs as soon
    as possible while avoiding advanced reservations.
 -- Add URG as an option to 'scancel --signal'.
 -- Check if the buffer returned from slurm_persist_msg_pack() isn't NULL.
 -- Modify all daemons to re-open log files on receipt of SIGUSR2 signal. This
    is much than using SIGHUP to re-read the configuration file and rebuild
    various tables.
 -- Add PrivateData=events configuration parameter
 -- Work for heterogeneous job support (complete solution in v17.11):
    * Add pointer to job option structure to job_step_create_allocation()
      function used by srun.
    * Parallelize task launch for heterogeneous job allocations (initial work).
    * Make packjobid, packjoboffset, and packjobidset fields available in squeue
      output.
    * Modify smap command to display heterogeneous job records using "#+#"
      format.
    * Add srun --pack-group and --mpi-combine options to control job step
      launch behaviour (not fully implemented).
    * Add pack job component ID to srun --label output (e.g. "P0 1:" for
      job component 0 and task 1).
    * jobcomp/elasticsearch: Add pack_job_id and pack_job_offset fields.
    * sview: Modified to display pack job information.
    * Major re-write of task state container logic to support for list of
      containers rather than one container per srun command.
    * Add some regression tests.
    * Add srun pack job environment variables when performing job allocation.
 -- Set Reason=dependency over Reason=JobArrayTaskLimit for pending jobs.
 -- Add slurm.conf configuration parameters SlurmctldSyslogDebug and
    SlurmdSyslogDebug to control which messages from the slurmctld and slurmd
    daemons get written to syslog.
 -- Add slurmdbd.conf configuration parameter DebugLevelSyslog to control which
    messages from the slurmdbd daemon get written to syslog.
 -- Fix handling of GroupUpdateForce option.
 -- Work for heterogeneous job support (complete solution in v17.11):
    * Add support to sched/backfill for concurrent allocation of all pack job
      components including support of --time-min option.
    * Defer initiation of a heterogeneous job until a components can be started
      at the same time, taking into consideration association and QOS limits
      for the job as a whole.
    * Perform limit check on heterogeneous job as a whole at submit time to
      reject jobs that will never be able to run.
    * Add pack_job_id and pack_job_offset to accounting database.
    * Modified sacct to accept pack job ID specification using "#+#" notation.
    * Modified sstat to accept pack job ID specification using "#+#" notation.
 -- Clear a job's "wait reason" value of BeginTime" after that time has passed.
    Previously a readon of "BeginTime" could be reported long after the job's
    requested begin time had passed.
 -- Split group_info in slurm_ctl_conf_t into group_force and group_time.
 -- Work for heterogeneous job support (complete solution in v17.11):
    * Fix I/O race condition on step termination for srun launching multiple
      pack job groups.
    * If prolog is running when attempting to signal a step, then return EAGAIN
      and retry rather than simply returning SLURM_ERROR and aborting.
    * Modify launch/slurm plugin to signal all components of a pack job rather
      than just the one (modify to use a list of step context records).
    * Add logic to support srun --mpi-combine option.
    * Set up debugger data structures.
    * Disable cancellation of individual component while the job is pending.
    * Modify scontrol job hold/release and update to operate with heterogeneous
      job id specification (e.g. "scontrol hold 123+4").
    * If srun lacks application specification for some component, the next one
      specified will be used for earlier components.

* Changes in Slurm 17.11.0pre1
==============================
 -- Interpet all format options in output/error file to log prolog errors. Prior
    logic only supported "%j" (job ID) option.
 -- Add the configure option --with-shared-libslurm which will link to
    libslurm.so instead of libslurm.o thus reducing the footprint of all the
    binaries.
 -- In switch plugin, added plugin_id symbol to plugins and wrapped
    switch_jobinfo_t with dynamic_plugin_data_t in interface calls in
    order to pass switch information between clusters with different switch
    types.
 -- Switch naming of acct_gather_infiniband to acct_gather_interconnect
 -- Make it so you can "stack" the interconnect plugins.
 -- Add a last_sched_eval timestamp to record when a job was last evaluated
    by the main scheduler or backfill.
 -- Add scancel "--hurry" option to avoid staging out any burst buffer data.
 -- Simplify the sched plugin interface.
 -- Add new advanced reservation flags of "weekday" (repeat on each weekday;
    Monday through Friday) and "weekend" (repeat on each weekend day; Saturday
    and Sunday).
 -- Add new advanced reservation flag of "flex", which permits jobs requesting
    the reservation to begin prior to the reservation's start time and use
    resources inside or outside of the reservation. A typical use case is to
    prevent jobs not explicitly requesting the reservation from using those
    reserved resources rather than forcing jobs requesting the reservation to
    use those resources in the time frame reserved.
 -- Add NoDecay flag to QOS.
 -- Node "OS" field expanded from "sysname" to "sysname release version" (e.g.
    change from "Linux" to
    "Linux 4.8.0-28-generic #28-Ubuntu SMP Sat Feb 8 09:15:00 UTC 2017").
 -- jobcomp/elasticsearch - Add "job_name" and "wc_key" fields to stored
    information.
 -- jobcomp/filetxt - Add ArrayJobId, ArrayTaskId, ReservationName, Gres,
    Account, QOS, WcKey, Cluster, SubmitTime, EligibleTime, DerivedExitCode and
    ExitCode.
 -- scontrol modified to report core IDs for reservation containing individual
    cores.
 -- MYSQL - Get rid of table join during rollup which speeds up the process
    dramatically on large job/step tables.
 -- Add ability to define features on clusters for directing federated jobs to
    different clusters.
 -- Add new RPC to process multiple federation RPCs in a single communication.
 -- Modify slurm_load_jobs() function to load job information from all clusters
    in a federation.
 -- Add squeue --local and --sibling options to modify filtering of jobs on
    federated clusters.
 -- Add SchedulerParameters option of bf_max_job_user_part to specifiy the
    maximum number of jobs per user for any single partition. This differs from
    bf_max_job_user in that a separate counter is applied to each partition
    rather than having a single counter per user applied to all partitions.
 -- Modify backfill logic so that bf_max_job_user, bf_max_job_part and
    bf_max_job_user_part options can all be used independently of each other.
 -- Add sprio -p/--partition option to filter jobs by partition name.
 -- Add partition name to job priority factor response message.
 -- Add sprio --local and --sibling options for use in federation of clusters.
 -- Add sprio "%c" format to print cluster name in federation mode.
 -- Modify sinfo logic to provided unified view of all nodes and partitions
    in a federation, add --local option to only report local state information
    even in a cluster, print cluster name with "%V" format option, and
    optionally sort by cluster name.
 -- If a task in a parallel job fails and it was launched with the
    --kill-on-bad-exit option then terminate the remaining tasks using the
    SIGCONT, SIGTERM and SIGKILL signals rather than just sending SIGKILL.
 -- Include submit_time when doing the sort for job scheduling.
 -- Modify sacct to report all jobs in federation by default. Also add --local
    option.
 -- Modify sacct to accept "--cluster all" option (in addition to the old
    "--cluster -1", which is still accepted).
 -- Modify sreport to report all jobs in federation by default. Also add --local
    option.
 -- sched/backfill: Improve assoc_limit_stop configuration parameter support.
 -- KNL features: Always keep active and available features in the same order:
    first site-specific features, next MCDRAM modes, last NUMA modes.
 -- Changed default ProctrackType to cgroup.
 -- Add "cluster_name" field to node_info_t and partition_info_t data structure.
    It is filled in only when the cluster is part of a federation and
    SHOW_FEDERATION flag used.
 -- Functions slurm_load_node() slurm_load_partitions() modified to show all
    nodes/partitions in a federation when the SHOW_FEDERATION flag is used.
 -- Add federated views to sview.
 -- Add --federation option to sacct, scontrol, sinfo, sprio, squeue, sreport to
    show a federated view. Will show local view by default.
 -- Add FederationParameters=fed_display slurm.conf option to configure status
    commands to display a federated view by default if the cluster is a member
    of a federation.
 -- Log the down nodes whenever slurmctld restarts.
 -- Report that "CPUs" plus "Boards" in node configuration invalid only if the
    CPUs value is not equal to the total thread count.
 -- Extend the output of the seff utility to also include the job's wall-clock
    time.
 -- Add bf_max_time to SchedulerParameters.
 -- Add bf_max_job_assoc to SchedulerParameters.
 -- Add new SchedulerParameters option bf_window_linear to control the rate at
    which the backfill test window expands. This can be used on a system with
    a modest number of running jobs (hundreds of jobs) to help prevent expected
    start times of pending jobs to get pushed forward in time. On systems with
    large numbers of running jobs, performance of the backfill scheduler will
    suffer and fewer jobs will be evaluated.
 -- Improve scheduling logic with respect to license use and node reboots.
 -- CRAY - Alter algorithm to come up with the SLURM_ID_HASH.
 -- Implement federated scheduling and federated status outputs.
 -- The '-q' option to srun has changed from being the short form of
    '--quit-on-interrupt' to '--qos'.
 -- Change sched_min_interval default from 0 to 2 microseconds.

* Changes in Slurm 17.02.12
==========================
 -- Fix segfault in slurmdbd hourly rollup when having a job outside a
    reservation, with no end_time set, from an assoc that's in a reservation.

* Changes in Slurm 17.02.11
==========================
 -- Fix insecure handling of user_name and gid fields. CVE-2018-10995.

* Changes in Slurm 17.02.10
==========================
 -- Fix updating of requested TRES memory.
 -- Cray modulefile: avoid removing /usr/bin from path on module unload.
 -- Fix issue when resetting the partition pointers on nodes.
 -- Show reason field in 'sinfo -R' when nodes is marked as failed.
 -- Fix potential of slurmstepd segfaulting when the extern step fails to start.
 -- Allow nodes state to be updated between FAIL and DRAIN.
 -- Avoid registering a job'd credential multiple times.
 -- Fix sbatch --wait to stop waiting after job is gone from memory.
 -- Fix memory leak of MailDomain configuration string when slurmctld daemon is
    reconfigured.
 -- Fix to properly remove extern steps from the starting_steps list.
 -- Fix Slurm to work correctly with HDF5 1.10+.
 -- Add support in salloc/srun --bb option for "access_mode" in addition to
    "access" for consistency with DW options.
 -- Fix potential deadlock in _run_prog() in power save code.
 -- MYSQL - Add dynamic_offset in the database to force range for auto
    increment ids for the tres_table.
 -- Avoid setting node in COMPLETING state indefinitely if the job initiating
    the node reboot is cancelled while the reboot in in progress.
 -- node_feature/knl_cray - Fix memory leaks that occur when slurmctld
    reconfigured.
 -- node_feature/knl_cray - Fix memory leak that can occur during normal
    operation.
 -- Fix job array dependency with "aftercorr" option and some task arrays in
    the first job fail. This fix lets all task array elements that can run
    proceed rather than stopping all subsequent task array elements.
 -- Fix whole node allocation cpu counts when --hint=nomultihtread.
 -- NRT - Fix issue when running on a HFI (p775) system with multiple protocols.
 -- Fix uninitialized variables when unpacking slurmdb_archive_cond_t.
 -- Fix security issue in accounting_storage/mysql plugin by always escaping
    strings within the slurmdbd. CVE-2018-7033.

* Changes in Slurm 17.02.9
==========================
 -- When resuming powered down nodes, mark DOWN nodes right after ResumeTimeout
    has been reached (previous logic would wait about one minute longer).
 -- Fix sreport not showing full column name for TRES Count.
 -- Fix slurmdb_reservations_get() giving wrong usage data when job's spanned
    reservation that was modified.
 -- Fix sreport reservation utilization report showing bad data.
 -- Show all TRES' on a reservation in sreport reservation utilization report by
    default.
 -- Fix sacctmgr show reservation handling "end" parameter.
 -- Work around issue with sysmacros.h and gcc7 / glibc 2.25.
 -- Fix layouts code to only allow setting a boolean.
 -- Fix sbatch --wait to keep waiting even if a message timeout occurs.
 -- CRAY - If configured with NodeFeatures=knl_cray and there are non-KNL
    nodes which include no features the slurmctld will abort without
    this patch when attemping strtok_r(NULL).
 -- Fix regression in 17.02.7 which would run the spank_task_privileged as
    part of the slurmstepd instead of it's child process.
 -- Fix security issue in Prolog and Epilog by always prepending SPANK_ to
    all user-set environment variables. CVE-2017-15566.

* Changes in Slurm 17.02.8
==========================
 -- Add 'slurmdbd:' to the accounting plugin to notify message is from dbd
    instead of local.
 -- mpi/mvapich - Buffer being only partially cleared. No failures observed.
 -- Fix for job --switch option on dragonfly network.
 -- In salloc with --uid option, drop supplementary groups before changing UID.
 -- jobcomp/elasticsearch - strip any trailing slashes from JobCompLoc.
 -- jobcomp/elasticsearch - fix memory leak when transferring generated buffer.
 -- Prevent slurmstepd ABRT when parsing gres.conf CPUs.
 -- Fix sbatch --signal to signal all MPI ranks in a step instead of just those
    on node 0.
 -- Check multiple partition limits when scheduling a job that were previously
    only checked on submit.
 -- Cray: Avoid running application/step Node Health Check on the external
    job step.
 -- Optimization enhancements for partition based job preemption.
 -- Address some build warnings from GCC 7.1, and one possible memory leak if
    /proc is inaccessible.
 -- If creating/altering a core based reservation with scontrol/sview on a
    remote cluster correctly determine the select type.
 -- Fix autoconf test for libcurl when clang is used.
 -- Fix default location for cgroup_allowed_devices_file.conf to use correct
    default path.
 -- Document NewName option to sacctmgr.
 -- Reject a second PMI2_Init call within a single step to prevent slurmstepd
    from hanging.
 -- Handle old 32bit values stored in the database for requested memory
    correctly in sacct.
 -- Fix memory leaks in the task/cgroup plugin when constraining devices.
 -- Make extremely verbose info messages debug2 messages in the task/cgroup
    plugin when constraining devices.
 -- Fix issue that would deny the stepd access to /dev/null where GRES has a
    'type' but no file defined.
 -- Fix issue where the slurmstepd would fatal on job launch if you have no
    gres listed in your slurm.conf but some in gres.conf.
 -- Fix validating time spec to correctly validate various time formats.
 -- Make scontrol work correctly with job update timelimit [+|-]=.
 -- Reduce the visibily of a number of warnings in _part_access_check.
 -- Prevent segfault in sacctmgr if no association name is specified for
    an update command.
 -- burst_buffer/cray plugin modified to work with changes in Cray UP05
    software release.
 -- Fix job reasons for jobs that are violating assoc MaxTRESPerNode limits.
 -- Fix segfault when unpacking a 16.05 slurm_cred in a 17.02 daemon.
 -- Fix setting TRES limits with case insensitive TRES names.
 -- Add alias for xstrncmp() -- slurm_xstrncmp().
 -- Fix sorting of case insensitive strings when using xstrcasecmp().
 -- Gracefully handle race condition when reading /proc as process exits.
 -- Avoid error on Cray duplicate setup of core specialization.
 -- Skip over undefined (hidden in Slurm) nodes in pbsnodes.
 -- Add empty hashes in perl api's slurm_load_node() for hidden nodes.
 -- CRAY - Add rpath logic to work for the alpscomm libs.
 -- Fixes for administrator extended TimeLimit (job reason & time limit reset).
 -- Fix gres selection on systems running select/linear.
 -- sview: Added window decorator for maximize,minimize,close buttons for all
    systems.
 -- squeue: interpret negative length format specifiers as a request to
    delimit values with spaces.
 -- Fix the torque pbsnodes wrapper script to parse a gres field with a type
    set correctly.

* Changes in Slurm 17.02.7
==========================
 -- Fix deadlock if requesting to create more than 10000 reservations.
 -- Fix potential memory leak when creating partition name.
 -- Execute the HealthCheckProgram once when the slurmd daemon starts rather
    than executing repeatedly until an exit code of 0 is returned.
 -- Set job/step start and end times to 0 when using --truncate and start > end.
 -- Make srun --pty option ignore EINTR allowing windows to resize.
 -- When resuming node only send one message to the slurmdbd.
 -- Modify srun --pty option to use configured SrunPortRange range.
 -- Fix issue with whole gres not being printed out with Slurm tools.
 -- Fix issue with multiple jobs from an array are prevented from starting.
 -- Fix for possible slurmctld abort with use of salloc/sbatch/srun
    --gres-flags=enforce-binding option.
 -- Fix race condition when using jobacct_gather/cgroup where the memory of the
    step wasn't always gathered correctly.
 -- Better debug when slurmdbd queue is filling up in the slurmctld.
 -- Fixed truncation on scontrol show config output.
 -- Serialize updates from from the dbd to the slurmctld.
 -- Fix memory leak in slurmctld when agent queue to the DBD has filled up.
 -- CRAY - Throttle step creation if trying to create too many steps at once.
 -- If failing after switch_g_job_init happened make sure switch_g_job_fini is
    called.
 -- Fix minor memory leak if launch fails in the slurmstepd.
 -- Fix issue where UnkillableStepProgram if step was in an ending state.
 -- Fix bug when tracking multiple simultaneous spawned ping cycles.
 -- jobcomp/elasticsearch plugin now saves state of pending requests on
    slurmctld daemon shutdown so then can be recovered on restart.
 -- Fix issue when an alternate munge key when communicating on a persistent
    connection.
 -- Document inconsistent behavior of GroupUpdateForce option.
 -- Fix bug in selection of GRES bound to specific CPUs where the GRES count
    is 2 or more. Previous logic could allocate CPUs not available to the job.
 -- Increase buffer to handle long /proc/<pid>/stat output so that Slurm can
    read correct RSS value and take action on jobs using more memory than
    requested.
 -- Fix srun job jobs that can run immediately to run in the highest priority
    partion when multiple partitions are listed. scontrol show jobs can
    potentially show the partition list in priority order.
 -- Fix starting controller if StateSaveLocation path didn't exist.
 -- Fix inherited association 'max' TRES limits combining multiple limits in
    the tree.
 -- Sort TRES id's on limits when getting them from the database.
 -- Fix issue with pmi[2|x] when TreeWidth=1.
 -- Correct buffer size used in determining specialized cores to avoid possible
    truncation of core specification and not reserving the specified cores.
 -- Close race condition on Slurm structures when setting DebugFlags.
 -- Make it so the cray/switch plugin grabs new DebugFlags on a reconfigure.
 -- Fix incorrect lock levels when creating or updating a reservation.
 -- Fix overlapping reservation resize.
 -- Add logic to help support Dell KNL systems where syscfg is different than
    the normal Intel syscfg.
 -- CRAY - Fix BB to handle type= correctly, regression in 17.02.6.

* Changes in Slurm 17.02.6
==========================
 -- Fix configurator.easy.html to output the SelectTypeParameters line.
 -- If a job requests a specific memory requirement then gets something else
    from the slurmctld make sure the step allocation is made aware of it.
 -- Fix missing initialization in slurmd.
 -- Fix potential degradation when running HTC (> 100 jobs a sec) like
    workflows through the slurmd.
 -- Fix race condition which could leave a stepd hung on shutdown.
 -- CRAY - Add configuration for ATP to the ansible play script.
 -- Fix potential to corrupt DBD message.
 -- burst_buffer logic modified to support sizes in both SI and EIC size units
    (e.g. M/MiB for powers of 1024, MB for powers of 1000).

* Changes in Slurm 17.02.5
==========================
 -- Prevent segfault if a job was blocked from running by a QOS that is then
    deleted.
 -- Improve selection of jobs to preempt when there are multiple partitions
    with jobs subject to preemption.
 -- Only set kmem limit when ConstrainKmemSpace=yes is set in cgroup.conf.
 -- Fix bug in task/affinity that could result in slurmd fatal error.
 -- Increase number of jobs that are tracked in the slurmd as finishing at one
    time.
 -- Note when a job finishes in the slurmd to avoid a race when launching a
    batch job takes longer than it takes to finish.
 -- Improve slurmd startup on large systems (> 10000 nodes)
 -- Add LaunchParameters option of cray_net_exclusive to control whether all
    jobs on the cluster have exclusive access to their assigned nodes.
 -- Make sure srun inside an allocation gets --ntasks-per-[core|socket]
    set correctly.
 -- Only make the extern step at job creation.
 -- Fix for job step task layout with --cpus-per-task option.
 -- Fix --ntasks-per-core option/environment variable parsing to set
    the requested value, instead of always setting one (srun).
 -- Correct error message when ClusterName in configuration files does not match
    the name in the slurmctld daemon's state save file.
 -- Better checking when a job is finishing to avoid underflow on job's
    submitted to a QOS/association.
 -- Handle partition QOS submit limits correctly when a job is submitted to
    more than 1 partition or when the partition is changed with scontrol.
 -- Performance boost for when Slurm is dealing with credentials.
 -- Fix race condition which could leave a stepd hung on shutdown.
 -- Add lua support for opensuse.

* Changes in Slurm 17.02.4
==========================
 -- Do not attempt to schedule jobs after changing the power cap if there are
    already many active threads.
 -- Job expansion example in FAQ enhanced to demonstrate operation in
    heterogeneous environments.
 -- Prevent scontrol crash when operating on array and no-array jobs at once.
 -- knl_cray plugin: Log incomplete capmc output for a node.
 -- knl_cray plugin: Change capmc parsing of mcdram_pct from string to number.
 -- Remove log files from test20.12.
 -- When rebooting a node and using the PrologFlags=alloc make sure the
    prolog is ran after the reboot.
 -- node_features/knl_generic - If a node is rebooted for a pending job, but
    fails to enter the desired NUMA and/or MCDRAM mode then drain the node and
    requeue the job.
 -- node_features/knl_generic disable mode change unless RebootProgram
    configured.
 -- Add new burst_buffer function bb_g_job_revoke_alloc() to be executed
    if there was a failure after the initial resource allocation. Does not
    release previously allocated resources.
 -- Test if the node_bitmap on a job is NULL when testing if the job's nodes
    are ready.  This will be NULL is a job was revoked while beginning.
 -- Fix incorrect lock levels when testing when job will run or updating a job.
 -- Add missing locks to job_submit/pbs plugin when updating a jobs
    dependencies.
 -- Add support for lua5.3
 -- Add min_memory_per_node|cpu to the job_submit/lua plugin to deal with lua
    not being able to deal with pn_min_memory being a uint64_t.  Scripts are
    urged to change to these new variables avoid issue.  If not set the
    variables will be 'nil'.
 -- Calculate priority correctly when 'nice' is given.
 -- Fix minor typos in the documentation.
 -- node_features/knl_cray: Preserve non-KNL active features if slurmctld
    reconfigured while node boot in progress.
 -- node_features/knl_generic: Do not repeatedly log errors when trying to read
    KNL modes if not KNL system.
 -- Add missing QOS read lock to backfill scheduler.
 -- When doing a dlopen on liblua only attempt the version compiled against.
 -- Fix null-dereference in sreport cluster ulitization when configured with
    memory-leak-debug.
 -- Fix Partition info in 'scontrol show node'. Previously duplicate partition
    names, or Partitions the node did not belong to could be displayed.
 -- Fix it so the backup slurmdbd will take control correctly.
 -- Fix unsafe use of MAX() macro, which could result in problems cleaning up
    accounting plugins in slurmd, or repeat job cancellation attempts in
    scancel.
 -- Fix 'scontrol update reservation duration=unlimited' to set the duration
    to 365-days (as is done elsewhere), rather than 49710 days.
 -- Check if variable given to scontrol show job is a valid jobid.
 -- Fix WithSubAccounts option to not include WithDeleted unless requested.
 -- Prevent a job tested on multiple partitions from being marked
    WHOLE_NODE_USER.
 -- Prevent a race between completing jobs on a user-exclusive node from
    leaving the node owned.
 -- When scheduling take the nodes in completing jobs out of the mix to reduce
    fragmentation.  SchedulerParameters=reduce_completing_frag
 -- For jobs submited to multiple partitions, report the job's earliest start
    time for any partition.
 -- Backfill partitions that use QOS Grp limits to "float" better.
 -- node_features/knl_cray: don't clear configured GRES from non-KNL node.
 -- sacctmgr - prevent segfault in command when a request is denied due
    to a insufficient priviledges.
 -- Add warning about libcurl-devel not being installed during configure.
 -- Streamline job purge by handling file deletion on a separate thread.
 -- Always set RLIMIT_CORE to the maximum permitted for slurmd, to ensure
    core files are created even on non-developer builds.
 -- Fix --ntasks-per-core option/environment variable parsing to set
    the requested value, instead of always setting one.
 -- If trying to cancel a step that hasn't started yet for some reason return
    a good return code.
 -- Fix issue with sacctmgr show where user=''

* Changes in Slurm 17.02.3
==========================
 -- Increase --cpu_bind and --mem_bind field length limits.
 -- Fix segfault when using AdminComment field with job arrays.
 -- Clear Dependency field when all dependencies are satisfied.
 -- Add --array-unique to squeue which will display one unique pending job
    array element per line.
 -- Reset backfill timers correctly without skipping over them in certain
    circumstances.
 -- When running the "scontrol top" command, make sure that all of the user's
    jobs have a priority that is lower than the selected job. Previous logic
    would permit other jobs with equal priority (no jobs with higher priority).
 -- Fix perl api so we always get an allocation when calling Slurm::new().
 -- Fix issue with cleaning up cpuset and devices cgroups when multiple steps
    end at the same time.
 -- Document that PriorityFlags option of DEPTH_OBLIVIOUS precludes the use of
    FAIR_TREE.
 -- Fix issue if an invalid message came in a Slurm daemon/command may abort.
 -- Make it impossible to use CR_CPU* along with CR_ONE_TASK_PER_CORE. The
    options are mutually exclusive.
 -- ALPS - Fix scheduling when ALPS doesn't agree with Slurm on what nodes
    are free.
 -- When removing a partition make sure it isn't part of a reservation.
 -- Fix seg fault if loading attempting to load non-existent burstbuffer plugin.
 -- Fix to backfill scheduling with respect to QOS and association limits. Jobs
    submitted to multiple partitions are most likley to be effected.
 -- sched/backfill: Improve assoc_limit_stop configuration parameter support.
 -- CRAY - Add ansible play and README.
 -- sched/backfill: Fix bug related to advanced reservations and the need to
    reboot nodes to change KNL mode.
 -- Preempt plugins - fix check for 'preempt_youngest_first' option.
 -- Preempt plugins - fix incorrect casts in preempt_youngest_first mode.
 -- Preempt/job_prio - fix incorrect casts in sort function.
 -- Fix to make task/affinity work with ldoms where there are more than 64
    cpus on the node.
 -- When using node_features/knl_generic make it so the slurmd doesn't segfault
    when shutting down.
 -- Fix potential double-xfree() when using job arrays that can lead to
    slurmctld crashing.
 -- Fix priority/multifactor priorities on a slurmctld restart if not using
    accounting_storage/[mysql|slurmdbd].
 -- Fix NULL dereference reported by CLANG.
 -- Update proctrack documentation to strongly encourage use of
    proctrack/cgroup.
 -- Fix potential memory leak if job fails to begin after nodes have been
    selected for a job.
 -- Handle a job that made it out of the select plugin without a job_resrcs
    pointer.
 -- Fix potential race condition when persistent connections are being closed at
    shutdown.
 -- Fix incorrect locks levels when submitting a batch job or updating a job
    in general.
 -- CRAY - Move delay waiting for job cleanup to after we check once.
 -- MYSQL - Fix memory leak when loading archived jobs into the database.
 -- Fix potential race condition when starting the priority/multifactor plugin's
    decay thread.
 -- Sanity check to make sure we have started a job in acct_policy.c before we
    clear it as started.
 -- Allow reboot program to use arguments.
 -- Message Aggr - Remove race condition on slurmd shutdown with respects to
    destroying a mutex.
 -- Fix updating job priority on multiple partitions to be correct.
 -- Don't remove admin comment when updating a job.
 -- Return error when bad separator is given for scontrol update job licenses.

* Changes in Slurm 17.02.2
==========================
 -- Update hyperlink to LBNL Node Health Check program.
 -- burst_buffer/cray - Add support for line continuation.
 -- If a job is cancelled by the user while it's allocated nodes are being
    reconfigured (i.e. the capmc_resume program is rebooting nodes for the job)
    and the node reconfiguration fails (i.e. the reboot fails), then don't
    requeue the job but leave it in a cancelled state.
 -- capmc_resume (Cray resume node script) - Do not disable changing a node's
    active features if SyscfgPath is configured in the knl.conf file.
 -- Improve the srun documentation for the --resv-ports option.
 -- burst_buffer/cray - Fix parsing for discontinuous allocated nodes. A job
    allocation of "20,22" must be expressed as "20\n22".
 -- Fix rare segfault when shutting down slurmctld and still sending data to
    the database.
 -- Fix gres output of a job if it is updated while pending to be displayed
    correctly with Slurm tools.
 -- Fix pam_slurm_adopt.
 -- Fix missing unlock when job_list doesn't exist when starting priority/
    multifactor.
 -- Fix segfault if slurmctld is shutting down and the slurmdbd plugin was
    in the middle of setting db_indexes.
 -- Add ESLURM_JOB_SETTING_DB_INX to errno to note when a job can't be updated
    because the dbd is setting a db_index.
 -- Fix possible double insertion into database when a job is updated at the
    moment the dbd is assigning a db_index.
 -- Fix memory error when updating a job's licenses.
 -- Fix seff to work correctly with non-standard perl installs.
 -- Export missing slurmdbd_defs_[init|fini] needed for libslurmdb.so to work.
 -- Fix sacct from returning way more than requested when querying against a job
    array task id.
 -- Fix double read lock of tres when updating gres or licenses on a job.
 -- Make sure locks are always in place when calling
    assoc_mgr_make_tres_str_from_array.
 -- Prevent slurmctld SEGV when creating reservation with duplicated name.
 -- Consider QOS flags Partition[Min|Max]Nodes when doing backfill.
 -- Fix slurmdbd_defs.c to not have half symbols go to libslurm.so and the
    other half go to libslurmdb.so.
 -- Fix 'scontrol show jobs' to remove an errant newline when 'Switches' is
    printed.
 -- Better code for handling memory required by a task on a heterogeneous
    system.
 -- Fix regression in 17.02.0 with respects to GrpTresMins on a QOS or
    Association.
 -- Cleanup to make make dist work.
 -- Schedule interactive jobs quicker.
 -- Perl API - correct value of MEM_PER_CPU constant to correctly handle
    memory values.
 -- Fix 'flags' variable to be 32 bit from the old 16 bit value in the perl api.
 -- Export sched_nodes for a job in the perl api.
 -- Improve error output when updating a reservation that has already started.
 -- Fix --ntasks-per-node issue with srun so DenyOnLimit would work correctly.
 -- node_features/knl_cray plugin - Fix memory leak.
 -- Fix wrong cpu_per_task count issue on heterogeneous system when dealing with
    steps.
 -- Fix double free issue when removing usage from an association with sacctmgr.
 -- Fix issue with SPANK plugins attempting to set null values as environment
    variables, which leads to the command segfaulting on newer glibc versions.
 -- Fix race condition on slurmctld startup when plugins have not gone through
    init() ahead of the rpc_manager processing incoming messages.
 -- job_submit/lua - expose admin_comment field.
 -- Allow AdminComment field to be set by the job_submit plugin.
 -- Allow AdminComment field to be changed by any Administrator.
 -- Fix key words in jobcomp select.
 -- MYSQL - Streamline job flush sql when doing a clean start on the slurmctld.
 -- Fix potential infinite loop when talking to the DBD when shutting down
    the slurmctld.
 -- Fix MCS filter.
 -- Make it so pmix can be included in the plugin rpm without having to
    specify --with-pmix.
 -- MYSQL - Fix initial load when not using he DBD.
 -- Fix scontrol top to not make jobs priority 0 (held).
 -- Downgrade info message about exceeding partition time limit to a debug2.

* Changes in Slurm 17.02.1-2
============================
 -- Replace clock_gettime with time(NULL) for very old systems without the call.

* Changes in Slurm 17.02.1
==========================
 -- Modify pam module to work when configured NodeName and NodeHostname differ.
 -- Update to sbatch/srun man pages to explain the "filename pattern" clearer
 -- Add %x to sbatch/srun filename pattern to represent the job name.
 -- job_submit/lua - Add job "bitflags" field.
 -- Update slurm.spec file to note obsolete RPMs.
 -- Fix deadlock scenario when dumping configuration in the slurmctld.
 -- Remove unneeded job lock when running assoc_mgr cache.  This lock could
    cause potential deadlock when/if TRES changed in the database and the
    slurmctld wasn't made aware of the change.  This would be very rare.
 -- Fix missing locks in gres logic to avoid potential memory race.
 -- If gres is NULL on a job don't try to process it when returning detailed
    information about a job to scontrol.
 -- Fix print of consumed energy in sstat when no energy is being collected.
 -- Print formatted tres string when creating/updating a reservation.
 -- Fix issues with QOS flags Partition[Min|Max]Nodes to work correctly.
 -- Prevent manipulation of the cpu frequency and governor for batch or
    extern steps. This addresses an issue where the batch step would
    inadvertently set the cpu frequency maximum to the minimum value
    supported on the node.
 -- Convert a slurmctd power management data structure from array to list in
    order to eliminate the possibility of zombie child suspend/resume
    processes.
 -- Burst_buffer/cray - Prevent slurmctld daemon abort if "paths" operation
    fails. Now job will be held. Update job update time when held.
 -- Fix issues with QOS flags Partition[Min|Max]Nodes to work correctly.
 -- Refactor slurmctld agent logic to eliminate some pthreads.
 -- Added "SyscfgTimeout" parameter to knl.conf configuration file.
 -- Fix for CPU binding for job steps run under a batch job.

* Changes in Slurm 17.02.0
==========================
 -- job_submit/lua - Make "immediate" parameter available.
 -- Fix srun I/O race condtion to eliminate a error message that might be
    generated if the application exits with outstanding stdin.
 -- Fix regression when purging/archiving jobs/events.
 -- Add new job state JOB_OOM indicating Out Of Memory condition as detected
    by task/cgroup plugin.
 -- If QOS has been added to the system go refigure out Deny/AllowQOS on
    partitions.
 -- Deny job with duplicate GRES requested.
 -- Fix loading super old assoc_mgr usage without segfaulting.
 -- CRAY systems: Restore TaskPlugins order of task/cray before task/cgroup.
 -- Task/cray: Treat missing "mems" cgroup with "debug" messages rather than
    "error" messages. The file may be missing at step termination due to a
    change in how cgroups are released at job/step end.
 -- Fix for job constraint specification with counts, --ntasks-per-node value,
    and no node count.
 -- Fix ordering of step task allocation to fill in a socket before going into
    another one.
 -- Fix configure to not require C++
 -- job_submit/lua - Remove access to slurmctld internal reservation fields of
    job_pend_cnt and job_run_cnt.
 -- Prevent job_time_limit enforcement from blocking other internal operations
    if a large number of jobs need to be cancelled.
 -- Add 'preempt_youngest_order' option to preempt/partition_prio plugin.
 -- Fix controller being able to talk to a pre-released DBD.
 -- Added ability to override the invoking uid for "scontrol update job"
    by specifying "--uid=<uid>|-u <uid>".
 -- Changed file broadcast "offset" from 32 to 64 bits in order to support files
    over 2 GB.
 -- slurm.spec - do not install init scripts alongside systemd service files.

* Changes in Slurm 17.02.0rc1
==============================
 -- Add port info to 'sinfo' and 'scontrol show node'.
 -- Fix errant definition of USE_64BIT_BITSTR which can lead to core dumps.
 -- Move BatchScript to end of each job's information when using
    "scontrol -dd show job" to make it more readable.
 -- Add SchedulerParameters configuration parameter of "default_gbytes", which
    treats numeric only (no suffix) value for memory and tmp disk space as being
    in units of Gigabytes. Mostly for compatability with LSF.
 -- Fix race condtion in srun/sattach logic which would prevent srun from
    terminating.
 -- Bitstring operations are now 64bit instead of 32bit.
 -- Replace hweight() function in bitstring with faster version.
 -- scancel would treat a non-numeric argument as the name of jobs to be
    cancelled (a non-documented feature). Cancelling jobs by name now require
    the "--jobname=" command line argument.
 -- scancel modified to note that no jobs satisfy the filter options when the
    --verbose option is used along with one or more job filters (e.g. "--qos=").
 -- Change _pack_cred to use pack_bit_str_hex instead of pack_bit_fmt for
    better scalability and performance.
 -- Add BootTime configuration parameter to knl.conf file to optimize resource
    allocations with respect to required node reboots.
 -- Add node_features_p_boot_time() to node_features plugin to optimize
    scheduling with respect to node reboots.
 -- Avoid allocating resources to a job in the event that its run time plus boot
    time (if needed) extent into an advanced reservation.
 -- Burst_buffer/cray - Avoid stage-out operation if job never started.
 -- node_features/knl_cray - Add capability to detected Uncorrectable Memory
    Errors (UME) and if detected then log the event in all job and step stderr
    with a message of the form:
    error: *** STEP 1.2 ON tux1 UNCORRECTABLE MEMORY ERROR AT 2016-12-14T09:09:37 ***
    Similar logic added to node_features/knl_generic in version 17.02.0pre4.
 -- If job is allocated nodes which are powered down, then reset job start time
    when the nodes are ready and do not charge the job for power up time.
 -- Add the ability to purge transactions from the database.
 -- Add support for requeue'ing of federated jobs (BETA).
 -- Add support for interactive federated jobs (BETA).
 -- Add the ability to purge rolled up usage from the database.
 -- Properly set SLURM_JOB_GPUS environment variable for Prolog.

* Changes in Slurm 17.02.0pre4
==============================
 -- Add support for per-partitiion OverTimeLimit configuration.
 -- Add --mem_bind option of "sort" to run zonesort on KNL nodes at step start.
 -- Add LaunchParameters=mem_sort option to configure running of zonesort
    by default at step startup.
 -- Add "FreeSpace" information for each pool to the "scontrol show burstbuffer"
    output. Required changes to the burst_buffer_info_t data structure.
 -- Add new node state flag of NODE_STATE_REBOOT for node reboots triggered by
    "scontrol reboot" commands. Previous logic re-used NODE_STATE_MAINT flag,
    which could lead to inconsistencies. Add "ASAP" option to "scontrol reboot"
    command that will drain a node in order to reboot it as soon as possible,
    then return it to service.
 -- Allow unit conversion routine to convert 1024M to 1G.
 -- switch/cray plugin - change legacy spool directory location.
 -- Add new PriorityFlags option of INCR_ONLY, which prevents a job's priority
    from being decremented.
 -- Make it so we don't purge job start messages until after we purge step
    messages.  Hopefully this will reduce the number of messages lost when
    filling up memory when the database/DBD is down.