Bugfix slurm daemon hang (#99)

* Change scr_srun to kill daemon process explicitly

Will not make changes to other resource managers, as we have not seen errors there and I have not evaluated this method for them.

scripts/TLCC/scr_run.in

@@ -126,8 +126,11 @@ fi
 
 # start background scr_transfer processes (1 per node) if async flush is enabled
 if [ "$SCR_FLUSH_ASYNC" == "1" ] ; then
+  redirect=""
+  if [ -z "$SCR_DEBUG" ]; then redirect="2> /dev/null"; fi
   nnodes=`$bindir/scr_glob_hosts --count --hosts $SCR_NODELIST`
-  srun -W 0 -n${nnodes} -N${nnodes} $bindir/scr_transfer $cntldir/transfer.scrinfo &
+  srun -q -Q --disable-status -W 0 -n${nnodes} -N${nnodes} $bindir/scr_transfer $cntldir/transfer.scrinfo $redirect &
+  daemon_pid=$!
 fi
 
 # enter the run loop
@@ -275,6 +278,13 @@ while [ 1 ] ; do
   fi
 done
 
+# Stop the transfer daemon
+if [ $daemon_pid ]; then
+    echo "Killing the transfer daemon process"
+    echo "This may result in an error message from slurmstepd"
+    kill -s SIGINT $daemon_pid
+fi
+
 # stop scr_transfer processes before we attempt to scavenge
 if [ "$SCR_FLUSH_ASYNC" == "1" ] ; then
   # TODO: this doesn't currently do anything