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https://issues.apache.org/jira/browse/IMPALA-9541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17100749#comment-17100749
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Quanlong Huang commented on IMPALA-9541:
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[~shajini] It's generally ok. Could you upload a DOCS patch in Gerrit?
> Document for dynamic log level changes
> --------------------------------------
>
> Key: IMPALA-9541
> URL: https://issues.apache.org/jira/browse/IMPALA-9541
> Project: IMPALA
> Issue Type: Documentation
> Components: Docs
> Reporter: Quanlong Huang
> Assignee: shajini thayasingh
> Priority: Major
> Attachments: log_level_full.png
>
>
> There is a /log_level tab in the debug page of all Impala servers. We can use
> it to dynamically adjust log levels without restarting the server. Although
> it's a feature implemented years ago (IMPALA-4822), there are no documents
> about it. I think we should add a section in
> https://impala.apache.org/docs/build/html/topics/impala_logging.html about
> it. Also it's good to explain the pattern of each line in logs.
> For FE debugging, I usually set log level of org.apache.impala to TRACE.
> For log pattern, it's
> ${level}${month}${day} HH:MM:SS.${us} ${thread-id} ${source-file}:${line}]
> ${query-id}] ${message}
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