[LU-15338] sanity test_205a: No jobstats for id.205a.dd.320 found on ost1::*.lustre-OST0000.job_stats

Related — Thu, 7 Sep 2023 00:37:06 +0000

This issue was created by maloo for Andreas Dilger <adilger@whamcloud.com>

This issue relates to the following test suite run: https://testing.whamcloud.com/test_sets/32ad6edf-a1b8-46ac-91ff-92eecbe0efe3

test_205a failed with the following error:

 sanity test_205a: @@@@@@ FAIL: No jobstats for id.205a.dd.320 found on ost1::*.lustre-OST0000.job_stats

However, the dumped jobstats show that there is a result for id.205a.dd.320, but also a result from the previous "dd" write operation that has an ID that has a matching (but longer) string id.205a.dd.32075, so the "grep -c" in the test matches two jobids and fails the test:

- job_id:          id.205a.dd.32075
  snapshot_time:   1615208459
  write_bytes:     { samples:           1, unit: bytes, min: 1048576, max: 1048576, sum:         1048576, sumsq:      1099511627776 }
  write:           { samples:           1, unit: usecs, min:     141, max:     141, sum:             141, sumsq:              19881 }
  punch:           { samples:           1, unit: usecs, min:      31, max:      31, sum:              31, sumsq:                961 }
  sync:            { samples:           1, unit: usecs, min:   42111, max:   42111, sum:           42111, sumsq:         1773336321 }
- job_id:          id.205a.dd.320
  snapshot_time:   1615208461
  read_bytes:      { samples:           1, unit: bytes, min: 1048576, max: 1048576, sum:         1048576, sumsq:      1099511627776 }
  read:            { samples:           1, unit: usecs, min:      53, max:      53, sum:              53, sumsq:               2809 }

I don't know the exact statistics of this happening, maybe around (4/32768 = 1/8192) since any 5-digit random number for the first "dd" has a 4-, 3-, 2-, and 1-digit substring that would also match. In any case, full-string matching should fix this problem.

VVVVVVV DO NOT REMOVE LINES BELOW, Added by Maloo for auto-association VVVVVVV
sanity test_205a - No jobstats for id.205a.dd.4 found on ost1::*.lustre-OST0000.job_stats

Whamcloud Community JIRA

[LU-15338] sanity test_205a: No jobstats for id.205a.dd.320 found on ost1::*.lustre-OST0000.job_stats