[jira] [Resolved] (IMPALA-9541) Document for dynamic log level changes

["Quanlong Huang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-9541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Quanlong Huang resolved IMPALA-9541.
------------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> 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
>             Fix For: Impala 4.0
>
>         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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