[LU-6167] endless loop in lustre_rsync

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.5.3
• Labels: patch
• Environment: CentOS
• Severity: 3
• Assignee: Yang Sheng
• Reporter: wu libin (Inactive)

Description

When test lustre_rsync combined with racer, some strange behavior come out.
1. follw is the test case i use:

1. Test 13 - lustre_rsync, use racer test suite
   test_13() {
   init_src
   init_changelog

local rrc=0
local rc=0
local clients=$CLIENTS
local RDIRS
local i

1. 1. init racer directories
   for d in ${RACERDIRS}; do
   is_mounted $d || continue

RDIRS="$RDIRS $d/racer"
mkdir -p $d/racer

1. lfs setstripe $d/racer -c -1
   if [ $MDSCOUNT -ge 2 ]; then
   for i in $(seq $((MDSCOUNT - 1))); do
   RDIRS="$RDIRS $d/racer$i"
   if [ ! -e $d/racer$i ]; then
   $LFS mkdir -i $i $d/racer$i ||
   error "lfs mkdir $i failed"
   fi
   done
   fi
   done

1. 2. racer start
   local rpids=""
   for rdir in $RDIRS; do
   do_nodes $clients "DURATION=$DURATION MDSCOUNT=$MDSCOUNT \
   $racer $rdir $NUM_RACER_THREADS" &
   pid=$!
   rpids="$rpids $pid"
   done
   for pid in $rpids; do
   wait $pid
   rc=$?
   echo "pid=$pid rc=$rc"
   if [ $rc != 0 ]; then
   rrc=$((rrc + 1))
   fi
   done
2. 8. Replicate the changes to $TGT and TGT2
   $LRSYNC -s $DIR -t $TGT -t $TGT2 -m $MDT0 -u $CL_USER -l $LREPL_LOG \
   -D $LRSYNC_LOG $EXTRA_FLAGS

1. 9. check difference
   check_diff $DIR $TGT
   check_diff $DIR $TGT2
   echo "check difference on target dir"
   sleep 120
   fini_changelog
   cleanup_src_tgt
   return 0
   }
   run_test 13 "lustre_rsync, use racer test suite"
   It will cause lustre_rsync run in a endless loop, and never come out.