hadoop-daemon.sh does not append to log files
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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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