[HDFS-7534] how to enable namenode GC logging

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Assignee: Kuldeep Kulkarni
• Reporter: Kuldeep Kulkarni
• Created: 16/Dec/14 19:29
• Updated: 16/Dec/14 21:01
• Resolved: 16/Dec/14 20:30

Description

Hey Team,

Could you please let me know how to enable GC logging for hadoop namenode. ?

I tried below method :

modified HADOOP_NAMENODE_OPTS in /etc/hadoop/conf/hadoop-env.sh as below and restarted namenode (HA is configured on cdh 4.7.0 )

before modification :

export HADOOP_NAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_NAMENODE_OPTS";

After modification:

export HADOOP_NAMENODE_OPTS="-Xloggc:%HADOOP_LOG_DIR%/gc-namenode.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_NAMENODE_OPTS";

this method is not working

could you please help me on this.

Thanks,
Kuldeep