[#LU-14299] sanity-quota test 61 fails with 'write failed, expect succeed'

sanity-quota test_61 fails with 'write failed, expect succeed'. The first time this test failed with this error message/case was on 05 May 2020 at https://testing.whamcloud.com/test_sets/f918d217-9487-479e-8294-16936426fe25 for Lustre 2.13.53.162. The failures are mostly seen for ZFS; 200 ZFS failures out of 218 total failures for this test with this error. So far, we are only seeing this failure on master( future 2.14.0).

set to use default quota
set default quota
get default quota
Disk default usr quota:
     Filesystem   bquota  blimit  bgrace   iquota  ilimit  igrace
    /mnt/lustre  20480   20480       0      0       0      10
Test not out of quota
running as uid/gid/euid/egid 60000/60000/60000/60000, groups:
 [dd] [if=/dev/zero] [bs=1M] [of=/mnt/lustre/d61.sanity-quota/f61.sanity-quota-0] [count=10] [oflag=sync]
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 1.71261 s, 6.1 MB/s
Test out of quota
CMD: trevis-201vm4 lctl set_param -n os[cd]*.*MDT*.force_sync=1
CMD: trevis-201vm3 lctl set_param -n osd*.*OS*.force_sync=1
running as uid/gid/euid/egid 60000/60000/60000/60000, groups:
 [dd] [if=/dev/zero] [bs=1M] [of=/mnt/lustre/d61.sanity-quota/f61.sanity-quota-0] [count=40] [oflag=sync]
dd: error writing '/mnt/lustre/d61.sanity-quota/f61.sanity-quota-0': Disk quota exceeded
20+0 records in
19+0 records out
19922944 bytes (20 MB, 19 MiB) copied, 3.91893 s, 5.1 MB/s
Increase default quota
CMD: trevis-201vm4 lctl set_param -n os[cd]*.*MDT*.force_sync=1
CMD: trevis-201vm3 lctl set_param -n osd*.*OS*.force_sync=1
running as uid/gid/euid/egid 60000/60000/60000/60000, groups:
 [dd] [if=/dev/zero] [bs=1M] [of=/mnt/lustre/d61.sanity-quota/f61.sanity-quota-0] [count=40] [oflag=sync]
dd: error writing '/mnt/lustre/d61.sanity-quota/f61.sanity-quota-0': Disk quota exceeded
1+0 records in
0+0 records out
0 bytes copied, 0.00246058 s, 0.0 kB/s
CMD: trevis-201vm4 /usr/sbin/lctl get_param -n version 2>/dev/null
CMD: trevis-201vm4 zpool get all
 sanity-quota test_61: @@@@@@ FAIL: write failed, expect succeed 
  Trace dump:
  = /usr/lib64/lustre/tests/test-framework.sh:6273:error()
  = /usr/lib64/lustre/tests/sanity-quota.sh:159:quota_error()
  = /usr/lib64/lustre/tests/sanity-quota.sh:3996:test_default_quota()
  = /usr/lib64/lustre/tests/sanity-quota.sh:4051:test_61()

Looking at the test, we increase the default quota, cancel OSC and MDC locks and sync data. We then run dd again and get the quota exceeded error

3986         log "Increase default quota"
3987         # increase default quota
3988         $LFS setquota $qdtype $qs $((LIMIT*3)) $qh $((LIMIT*3)) $DIR ||
3989                 error "set default quota failed"
3990 
3991         cancel_lru_locks osc
3992         cancel_lru_locks mdc
3993         sync; sync_all_data || true
3994         if [ $qpool == "data" ]; then
3995                 $RUNAS $DD of=$TESTFILE count=$((LIMIT*2 >> 10)) oflag=sync ||
3996                         quota_error $qtype $qid "write failed, expect succeed"
3997         else
3998                 $RUNAS createmany -m $TESTFILE $((LIMIT*2)) ||
3999                         quota_error $qtype $qid "create failed, expect succeed"
4000 
4001                 unlinkmany $TESTFILE $((LIMIT*2))
4002         fi

[LU-14299] sanity-quota test 61 fails with 'write failed, expect succeed' Created: 06/Jan/21 Updated: 13/Jun/22 Resolved: 08/Feb/21
Status:	Resolved
Project:	Lustre
Component/s:	None
Affects Version/s:	Lustre 2.14.0
Fix Version/s:	Lustre 2.14.0

[LU-14299] sanity-quota test 61 fails with 'write failed, expect succeed' Created: 06/Jan/21 Updated: 13/Jun/22 Resolved: 08/Feb/21