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https://issues.apache.org/jira/browse/BIGTOP-1038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730406#comment-13730406
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Bruno Mahé commented on BIGTOP-1038:
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Wouldn't it be more complicated than just taking in account
_$HADOOP_IDENT_STRING_?
For instance, if one changes that variable, that user should have the rights
for writing log/pid/etc. files.
Packages go through quite some work to ensure that all the files have the right
permissions, the right users are setup correctly with the right ulimit and so
forth.
So is there any benefit to enables such overrides such as $HADOOP_IDENT_STRING?
> PIDFILE in service scripts of Hadoop is inconsistent with the path in
> hadoop-daemon.sh
> --------------------------------------------------------------------------------------
>
> Key: BIGTOP-1038
> URL: https://issues.apache.org/jira/browse/BIGTOP-1038
> Project: Bigtop
> Issue Type: Bug
> Components: Init scripts
> Affects Versions: 0.6.0
> Reporter: Masatake Iwasaki
> Assignee: Masatake Iwasaki
>
> PIDFILE in service scripts is fixed value because of variable expansion
> during packaging.
> {noformat}
> $ grep 'PIDFILE=' /etc/init.d/hadoop-*
> /etc/init.d/hadoop-hdfs-datanode:PIDFILE="/var/run/hadoop-hdfs/hadoop-hdfs-datanode.pid"
> /etc/init.d/hadoop-hdfs-namenode:PIDFILE="/var/run/hadoop-hdfs/hadoop-hdfs-namenode.pid"
> /etc/init.d/hadoop-mapreduce-historyserver:PIDFILE="/var/run/hadoop-mapreduce/mapred-mapred-historyserver.pid"
> /etc/init.d/hadoop-yarn-nodemanager:PIDFILE="/var/run/hadoop-yarn/yarn-yarn-nodemanager.pid"
> /etc/init.d/hadoop-yarn-resourcemanager:PIDFILE="/var/run/hadoop-yarn/yarn-yarn-resourcemanager.pid"
> {noformat}
> However, HADOOP_IDENT_STRING composing pidfile path is configurable in
> hadoop-env.sh.
> {noformat}
> $ grep HADOOP_IDENT_STRING /usr/lib/hadoop/sbin/hadoop-daemon.sh
> # HADOOP_IDENT_STRING A string representing this instance of hadoop.
> $USER by default
> export HADOOP_IDENT_STRING=$HADOOP_SECURE_DN_USER
> if [ "$HADOOP_IDENT_STRING" = "" ]; then
> export HADOOP_IDENT_STRING="$USER"
> chown $HADOOP_IDENT_STRING $HADOOP_LOG_DIR
> export HADOOP_LOGFILE=hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.log
> log=$HADOOP_LOG_DIR/hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.out
> pid=$HADOOP_PID_DIR/hadoop-$HADOOP_IDENT_STRING-$command.pid
> {noformat}
> As a result, the path of pidfile matches only when HADOOP_IDENT_STRING is
> service user name which is the default.
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