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https://issues.apache.org/jira/browse/HADOOP-6746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Travis Crawford updated HADOOP-6746:
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Attachment: HADOOP-6746.patch
> 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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