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From "Gokul (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6746) hadoop-daemon.sh does not append to log files
Date Mon, 14 Jun 2010 06:59:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878495#action_12878495
] 

Gokul commented on HADOOP-6746:
-------------------------------


i am not getting the point here.

Currently, everytime you restart the cluster the log is getting appended right??

{quote}
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.
{quote}

can you make it elaborate?


> 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
>
> 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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