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https://issues.apache.org/jira/browse/IMPALA-5142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-5142:
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Fix Version/s: Impala 2.11.0
> EventSequence::MarkEvent() may record concurrent events out of serialized
> order
> -------------------------------------------------------------------------------
>
> Key: IMPALA-5142
> URL: https://issues.apache.org/jira/browse/IMPALA-5142
> Project: IMPALA
> Issue Type: Bug
> Components: Distributed Exec
> Affects Versions: Impala 2.7.0
> Reporter: Mostafa Mokhtar
> Assignee: Pranay Singh
> Priority: Trivial
> Labels: ramp-up, trivial
> Fix For: Impala 2.11.0
>
>
> When the event for first dynamic filter is received ahead of all fragments
> started the query timeline prints a negative time value for "fragment
> instances started"
> {code}
> - Planning finished: 790.555ms (32.872ms)
> Query Timeline: 2m40s
> - Query submitted: 7.295ms (7.295ms)
> - Planning finished: 1s397ms (1s390ms)
> - Submit for admission: 3s059ms (1s661ms)
> - Completed admission: 3s087ms (27.810ms)
> - Ready to start 90 fragment instances: 3s527ms (440.540ms)
> - First dynamic filter received: 7s851ms (4s323ms)
> - All 90 fragment instances started: 7s851ms (-88037.000ns)
> - Rows available: 2m28s (2m20s)
> - First row fetched: 2m28s (51.725ms)
> - Unregister query: 2m30s (1s459ms)
> - ComputeScanRangeAssignmentTimer: 770.794ms
> {code}
> Query timeline when filter arrive after all fragments starting.
> {code}
> Query Timeline: 17s011ms
> - Query submitted: 174.449us (174.449us)
> - Planning finished: 209.847ms (209.672ms)
> - Submit for admission: 255.819ms (45.971ms)
> - Completed admission: 256.212ms (393.074us)
> - Ready to start 90 fragment instances: 283.582ms (27.370ms)
> - All 90 fragment instances started: 627.013ms (343.430ms)
> - First dynamic filter received: 954.223ms (327.209ms)
> - Rows available: 16s393ms (15s439ms)
> - First row fetched: 16s705ms (311.586ms)
> - Unregister query: 16s871ms (165.908ms)
> - ComputeScanRangeAssignmentTimer: 13.125ms
> {code}
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