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From "BELUGA BEHR (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20168) ReduceSinkOperator Logging Hidden
Date Tue, 24 Jul 2018 18:43:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16554665#comment-16554665
] 

BELUGA BEHR commented on HIVE-20168:
------------------------------------

[~bharos92] Thank you the assist.  One more item.  Sorry.  Can you please include the {{abort}}
flag in the logging message of {{closeOp}} as well? Thanks!

> ReduceSinkOperator Logging Hidden
> ---------------------------------
>
>                 Key: HIVE-20168
>                 URL: https://issues.apache.org/jira/browse/HIVE-20168
>             Project: Hive
>          Issue Type: Bug
>          Components: Operators
>    Affects Versions: 3.0.0, 4.0.0
>            Reporter: BELUGA BEHR
>            Assignee: Bharathkrishna Guruvayoor Murali
>            Priority: Minor
>              Labels: newbie, noob
>         Attachments: HIVE-20168.1.patch, HIVE-20168.2.patch
>
>
> [https://github.com/apache/hive/blob/ac6b2a3fb195916e22b2e5f465add2ffbcdc7430/ql/src/java/org/apache/hadoop/hive/ql/exec/ReduceSinkOperator.java]
>  
> {code:java}
> if (LOG.isTraceEnabled()) {
>   if (numRows == cntr) {
>     cntr = logEveryNRows == 0 ? cntr * 10 : numRows + logEveryNRows;
>     if (cntr < 0 || numRows < 0) {
>       cntr = 0;
>       numRows = 1;
>     }
>     LOG.info(toString() + ": records written - " + numRows);
>   }
> }
> ...
> if (LOG.isTraceEnabled()) {
>   LOG.info(toString() + ": records written - " + numRows);
> }
> {code}
> There are logging guards here checking for TRACE level debugging but the logging is actually
INFO.  This is important logging for detecting data skew.  Please change guards to check for
INFO... or I would prefer that the guards are removed altogether since it's very rare that
a service is running with only WARN level logging.



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