The race condition was created in a7c8964e in 17.11.6 when removing
the (unsafe) pthread_cancel code handling thread termination.

Bug 5164

Commits f18390e8 and eed76f85 modified the stepd so that if the
stepd encountered an unkillable step timeout that the stepd would just
exit the stepd. If the stepd is a batch step then it would reply back
to the controller with a non-zero exit code which will drain the node.
But if an srun allocation/step were to get into the unkillable step
code, the steps wouldn't let the waiting srun or controller know about
the step going away -- leaving a hanging srun and job.

This patch enables the stepd to notify the waiting sruns and the ctld of
the stepd being done and drains the node for srun'ed alloction and/or
steps.

Bug 5164

g_qos_count, g_qos_max_priority, must be call under qos write lock.

Bug 5159.

Display correct path.

Bug 5151

Commits 4454316e and 76706b51 adjusted the updating of priority logic so
that when a non-authorized user modifies the priority it will only be
temporary -- in most cases the user will never see that change.

Bug 5151

Clarification of c2c06468.

Bug 5150

PriorityFlags=ACCRUE_ALWAYS is set.

Bug 5186

Bug 5174.

Since having 'nocreate' would override the following option:
create 640 slurm root

Bug 5174.

If ReturnToService=2 is configured, the test could generate an error
changing node state to resume after setting it to down. The reason
is if the node communicates with slurmctld, then its state will
automatically be changed from down to idle and resuming an idle
node triggers an error.

Bug 5168.

Previously the default paths continued to be tested even when new ones
were requested. This had as a consequence that if any of the new paths
was the same as any of the default ones (i.e. /usr or /usr/local), the
configure script was incorrectly erroring out specifying that a version
of PMIx was already found in a previous path.

Bug 5168.

Gracefully fail if salloc does not get job allocation

Introduced in bf4cb0b1.

First issue was identified on multi partition requests. job_limits_check()
was overriding the original memory requests, so the next partition
Slurm validating limits against was not using the original values. The
solution consists in adding three members to job_details struct to
preserve the original requests. This issue is reported in bug 4895.

Second issue was memory enforcement behavior being different depending on
job the request issued against a reservation or not.

Third issue had to do with the automatic adjustments Slurm did underneath
when the memory request exceeded the limit. These adjustments included
increasing pn_min_cpus (even incorrectly beyond the number of cpus
available on the nodes) or different tricks increasing cpus_per_task and
decreasing mem_per_cpu.

Fourth issue was identified when requesting the special case of 0 memory,
which was handled inside the select plugin after the partition validations
and thus that could be used to incorrectly bypass the limits.

Issues 2-4 were identified in bug 4976.

Patch also includes an entire refactor on how and when job memory is
is both set to default values (if not requested initially) and how and
when limits are validated.

Co-authored-by: Dominik Bartkiewicz <bart@schedmd.com>

If running without AccountingStorageEnforce but with the DBD and
it isn't up when starting the slurmctld you could get into a
corner case where you don't have a QOS list in the assoc_mgr.  Thus no
usage to transfer.

Bug 5156

Update slurm.spec and slurm.spec-legacy as well

Clang warns about a possible null dereference of job_part_ptr
if the !job_ptr->priority_array part of the conditional is taken.

Remove that part of the conditional, as it doesn't matter if that is
set or not here. The jobs eligibility on one vs. multiple partition is
not determined by that, but by the status of part_ptr_list and part_ptr.

Bug 5136.

Try to fill up each socket completely before moving into additional
sockets. This will minimize the number of sockets needed, improving
packing especially alongside MaxCPUsPerNode.

Bug 4995.

My mistake on commit 602817c8.

Bug 4922.

Without this, gang scheduling would incorrectly kick in for
these jobs since active_resmap has not been updated appropriately.

Bug 4922.

Code for this was removed in 2012.

Bug 5126.

Bug 5026.

Otherwise this will return the error message back to the next job submitter.

Bug 5106.

Bug 5106.

Link to CRIU as well.

Bug 4293.

Related to fix from bug 4155.

Bug 4155.

job_ptr->part_ptr is NULL if the partition has been deleted.

Crash only happens with PriorityFlags=CALCULATE_RUNNING enabled.

Bug 5136.

Bug 5146

Caused by a corrupted protocol_version field value being received
by the slurmstepd, as we cannot safely write/read a uint16_t across
the pipe as if it was an int.

Regression caused by commit 90b116c2.

Bug 5133.

Requeued jobs are marked as PENDING|COMPLETING until the epilog checks
in. The issue is that if job_set_alloc_tres gets called while in the
PENDING|COMPLETING state, the job's alloc_tres_str will be free'd. If
this job then gets checkpointed in this state (PENDING|COMPLETING + no
tres_alloc_str) on startup the controller would crash because it
expected the job to have a tres_alloc_str/cnt when in the COMPLETING
state. This could be triggered if starting the controller without the
dbd up. When the dbd comes up, the assoc_cache_mgr calls
_update_job_tres() which calls job_set_alloc_tres. It could also be
triggered by adding new tres.

This most likely started happening in 17.11.5 because of commit
865b672f which introduced calling _update_job_tres() on each job
after the dbd comes up.

Bugs 5137,4522

Only when the connection has timedout. If the connection is timing out,
consider increasing TCPTimeout in the slurm.conf

Bug 4574