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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6746) hadoop-daemon.sh does not append to log files
Date Tue, 15 Jun 2010 03:17:23 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878843#action_12878843
] 

Hadoop QA commented on HADOOP-6746:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org
  against trunk revision 954647.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/584/console

This message is automatically generated.

> hadoop-daemon.sh does not append to log files
> ---------------------------------------------
>
>                 Key: HADOOP-6746
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6746
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Travis Crawford
>         Attachments: HADOOP-6746.patch
>
>
> Looking in hadoop-daemon.sh we see the start command redirects logs to the log file by
creating a new file. It does not append to the log.
> nohup nice -n $HADOOP_NICENESS "$HADOOP_HOME"/bin/hadoop --config $HADOOP_CONF_DIR $command
"$@" > "$log" 2>&1 < /dev/null &
> I believe output should be appended to the log file so logrotate copytruncate works.
Currently a large log file cannot be truncated without restarting the running service, which
causes issues in production environments.
> The improved line would be exactly the same, except use >> to open the log file
in append mode.
> nohup nice -n $HADOOP_NICENESS "$HADOOP_HOME"/bin/hadoop --config $HADOOP_CONF_DIR $command
"$@" >> "$log" 2>&1 < /dev/null &

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