hi all we are trying to rotate the gc logs on workers machines according to the following we add the line -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2K inside HADOOP_DATANODE_OPTS variable in HDFS --> Advanced hadoop-env as the following: <br>export HADOOP_DATANODE_OPTS="-server -XX:ParallelGCThreads=4 -XX:+UseConcMarkSweepGC -XX:ErrorFile=/var/log/hadoop/$USER/hs_err_pid%p.log -XX:NewSize=200m -XX:MaxNewSize=200m -Xloggc:/var/log/hadoop/$USER/gc.log-`date +'%Y%m%d%H%M'` -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2K -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Xms{{dtnode_heapsize}} -Xmx{{dtnode_heapsize}} -Dhadoop.security.logger=INFO,DRFAS -Dhdfs.audit.logger=INFO,DRFAAUDIT ${HADOOP_DATANODE_OPTS}" but we get on worker machine ( data node under /var/log/hadoop/hdfs ) , the follwing -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:33 hadoop-hdfs-datanode-worker01.sys76.com.log.10 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:35 hadoop-hdfs-datanode-worker01.sys76.com.log.9 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:36 hadoop-hdfs-datanode-worker01.sys76.com.log.8 -rw-r--r-- 1 hdfs hadoop 1504 Aug 26 20:37 hadoop-hdfs-datanode-worker01.sys76.com.log.7 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:38 hadoop-hdfs-datanode-worker01.sys76.com.log.6 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:40 hadoop-hdfs-datanode-worker01.sys76.com.log.5 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:41 hadoop-hdfs-datanode-worker01.sys76.com.log.4 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:43 hadoop-hdfs-datanode-worker01.sys76.com.log.3 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:44 hadoop-hdfs-datanode-worker01.sys76.com.log.2 -rw-r--r-- 1 hdfs hadoop 1035 Aug 26 20:46 hadoop-hdfs-datanode-worker01.sys76.com.log.1 -rw-r--r-- 1 hdfs hadoop 727 Aug 26 20:46 hadoop-hdfs-datanode-worker01.sys76.com.out.4 -rw-r--r-- 1 hdfs hadoop 3905 Aug 26 20:46 gc.log-201808262031.0.current -rw-r--r-- 1 hdfs hadoop 727 Aug 26 20:46 hadoop-hdfs-datanode-worker01.sys76.com.out.3 -rw-r--r--. 1 hdfs hadoop 101346 Aug 26 21:53 SecurityAuth.audit -rw-r--r-- 1 hdfs hadoop 7488 Aug 27 06:25 gc.log-201808262046 -rw-r--r-- 1 hdfs hadoop 727 Aug 27 06:28 hadoop-hdfs-datanode-worker01.sys76.com.out.2 -rw-r--r-- 1 hdfs hadoop 3651 Aug 27 06:28 gc.log-201808270625.0.current -rw-r--r-- 1 hdfs hadoop 727 Aug 27 06:29 hadoop-hdfs-datanode-worker01.sys76.com.out.1 -rw-r--r-- 1 hdfs hadoop 727 Aug 27 06:29 hadoop-hdfs-datanode-worker01.sys76.com.out -rw-r--r-- 1 hdfs hadoop 2940 Aug 27 06:29 gc.log-201808270629.0.current -rw-r--r-- 1 hdfs hadoop 378069 Aug 27 06:34 hadoop-hdfs-datanode-worker01.sys76.com.log why gc.log.... are not rotated and comes with "0.current" what is wrong with my configuration? ** we also try the following but this isn't worked In hadoop-env template wherever you find -XX:+PrintGCDetails parameter you can add -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2M For example: From: HADOOP_JOBTRACKER_OPTS="-server -XX:ParallelGCThreads=8 -XX:+UseConcMarkSweepGC -XX:ErrorFile={{hdfs_log_dir_prefix}}/$USER/hs_err_pid%p.log -XX:NewSize={{jtnode_opt_newsize}} -XX:MaxNewSize={{jtnode_opt_maxnewsize}} -Xloggc:{{hdfs_log_dir_prefix}}/$USER/gc.log-`date +'%Y%m%d%H%M'` -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Xmx{{jtnode_heapsize}} -Dhadoop.security.logger=INFO,DRFAS -Dmapred.audit.logger=INFO,MRAUDIT -Dhadoop.mapreduce.jobsummary.logger=INFO,JSA ${HADOOP_JOBTRACKER_OPTS}" To: HADOOP_JOBTRACKER_OPTS="-server -XX:ParallelGCThreads=8 -XX:+UseConcMarkSweepGC -XX:ErrorFile={{hdfs_log_dir_prefix}}/$USER/hs_err_pid%p.log -XX:NewSize={{jtnode_opt_newsize}} -XX:MaxNewSize={{jtnode_opt_maxnewsize}} -Xloggc:{{hdfs_log_dir_prefix}}/$USER/gc.log-`date +'%Y%m%d%H%M'` -verbose:gc -XX:+PrintGCDetails <strong>-XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2M </strong>-XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -Xmx{{jtnode_heapsize}} -Dhadoop.security.logger=INFO,DRFAS -Dmapred.audit.logger=INFO,MRAUDIT -Dhadoop.mapreduce.jobsummary.logger=INFO,JSA ${HADOOP_JOBTRACKER_OPTS}" ... View more