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https://issues.apache.org/jira/browse/HDFS-6576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357507#comment-14357507
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Allen Wittenauer commented on HDFS-6576:
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Actually, this is fixed in trunk so only if someone needs it in branch-2.
> Datanode log is generating at root directory in security mode
> -------------------------------------------------------------
>
> Key: HDFS-6576
> URL: https://issues.apache.org/jira/browse/HDFS-6576
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, scripts
> Affects Versions: 2.4.0
> Reporter: surendra singh lilhore
> Assignee: surendra singh lilhore
> Priority: Minor
> Attachments: HDFS-6576.patch, HDFS-6576_1.patch
>
>
> In hadoop-env.sh script we are exporting HADOOP_SECURE_DN_LOG_DIR , but in
> above line export statement for HADOOP_LOG_DIR is commented
> If in user environment HADOOP_LOG_DIR is not exported then
> HADOOP_SECURE_DN_LOG_DIR env variable will export with "/" value and DN will
> logs in root directory.
> {noformat}
> # Where log files are stored. $HADOOP_HOME/logs by default.
> #export HADOOP_LOG_DIR=${HADOOP_LOG_DIR}/$USER
> # Where log files are stored in the secure data environment.
> export HADOOP_SECURE_DN_LOG_DIR=${HADOOP_LOG_DIR}/${HADOOP_HDFS_USER}
> {noformat}
> I think we should comment this line.
> In hadoop-daemon.sh already handled case if value of HADOOP_SECURE_DN_LOG_DIR
> and HADOOP_LOG_DIR is empty.
> In hadoop-daemon.sh we assigning value of HADOOP_SECURE_DN_LOG_DIR in
> HADOOP_LOG_DIR and after that we are checking if HADOOP_LOG_DIR is empty then
> HADOOP_LOG_DIR env variable export with "$HADOOP_PREFIX/logs" value
> {noformat}
> # Determine if we're starting a secure datanode, and if so, redefine
> appropriate variables
> if [ "$command" == "datanode" ] && [ "$EUID" -eq 0 ] && [ -n
> "$HADOOP_SECURE_DN_USER" ]; then
> export HADOOP_PID_DIR=$HADOOP_SECURE_DN_PID_DIR
> export HADOOP_LOG_DIR=$HADOOP_SECURE_DN_LOG_DIR
> export HADOOP_IDENT_STRING=$HADOOP_SECURE_DN_USER
> starting_secure_dn="true"
> fi
> if [ "$HADOOP_IDENT_STRING" = "" ]; then
> export HADOOP_IDENT_STRING="$USER"
> fi
> # get log directory
> if [ "$HADOOP_LOG_DIR" = "" ]; then
> export HADOOP_LOG_DIR="$HADOOP_PREFIX/logs"
> fi
> {noformat}
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