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From "Benjamin Lerer (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CASSANDRA-11307) Inappropriate WARN log message for commit log sync delay when using commitlog_sync: batch
Date Wed, 08 Feb 2017 12:55:41 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-11307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Lerer reassigned CASSANDRA-11307:
------------------------------------------

    Assignee:     (was: Benjamin Lerer)

> Inappropriate WARN log message for commit log sync delay when using commitlog_sync: batch
> -----------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-11307
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11307
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Linux
>            Reporter: Gary Ogasawara
>            Priority: Minor
>
> In v2.1.11 when using configuration
> commitlog_sync: batch
> commitlog_sync_batch_window_in_ms: 2
> will frequently get this WARN log though there is not a real problem.
> WARN  [COMMIT-LOG-WRITER] 2016-03-03 00:40:11,646 AbstractCommitLogService.java:105 -
Out of 142412 commit log syncs over the past 300s with average duration of 0.00ms, 35 have
exceeded the configured commit interval by an average of 3.66ms
> WARN  [COMMIT-LOG-WRITER] 2016-03-03 00:45:11,755 AbstractCommitLogService.java:105 -
Out of 104605 commit log syncs over the past 300s with average duration of 1.74ms, 18314 have
exceeded the configured commit interval by an average of 6.33ms
> Looks like BatchCommitLogService sets AbstractCommitLogService() pollIntervalMillis to
the configured commitlog_sync_batch_window_in_ms.  Since CASSANDRA-9504, this is by default
set to 2 which causes this WARN message to be triggered unnecessarily.



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