Hadoop : Fix ERROR check containerexecutor

Where is this error coming from ?

Now checking log file :
[root@hadoopmaster1 yarn]# pwd
/var/log/hadoop-yarn/yarn
[root@hadoopmaster1 yarn]# grep ERROR yarn-yarn-resourcemanager-hadoopmaster1.log
2014-09-08 23:47:58,974 INFO  rmnode.RMNodeImpl (RMNodeImpl.java:transition(621)) - Node hadoopmaster1:45454 reported UNHEALTHY with details: ERROR check containerexecutor, OK: disks ok,

In /etc/hadoop/conf/yarn-site.xml

    <name>yarn.nodemanager.health-checker.script.path</name>
    <value>/etc/hadoop/conf/health_check</value>

[root@hadoopmaster1 conf]# pwd
/etc/hadoop/conf
[root@hadoopmaster1 conf]# ./health_check
ERROR check containerexecutor, OK: disks ok,

in /etc/hadoop/conf/health_check

function check_containerexecutor {
  perm=`stat -c %a:%U:%G /usr/lib/hadoop-yarn/bin/container-executor 2>/dev/null
`
  if [ $? -eq 0 ] && [ "$perm" == "6050:root:hadoop" ] ; then
    echo "containerexecutor ok"
  else
    echo 'check containerexecutor' ; exit 1
  fi
}


Solution :
chown root:hadoop /usr/lib/hadoop-yarn/bin/container-executor
chmod 6050 /usr/lib/hadoop-yarn/bin/container-executor

[root@hadoopmaster1 yarn]# chown root:hadoop /usr/lib/hadoop-yarn/bin/container-executor
[root@hadoopmaster1 yarn]# ls -al /usr/lib/hadoop-yarn/bin/container-executor
----r-x---. 1 root hadoop 40096 Aug 27 23:15 /usr/lib/hadoop-yarn/bin/container-executor
[root@hadoopmaster1 yarn]# chmod 6050 /usr/lib/hadoop-yarn/bin/container-executor
[root@hadoopmaster1 yarn]# ls -al /usr/lib/hadoop-yarn/bin/container-executor
---Sr-s---. 1 root hadoop 40096 Aug 27 23:15 /usr/lib/hadoop-yarn/bin/container-executor

[root@hadoopmaster1 conf]# ./health_check
OK: disks ok,containerexecutor ok,

Now restart YARN

stop:
/usr/lib/hadoop-yarn/sbin/yarn-daemon.sh --config $HADOOP_CONF_DIR stop resourcemanager

/usr/lib/hadoop-yarn/sbin/yarn-daemon.sh --config $HADOOP_CONF_DIR stop nodemanager

start:
/usr/lib/hadoop-yarn/sbin/yarn-daemon.sh --config $HADOOP_CONF_DIR start resourcemanager

/usr/lib/hadoop-yarn/sbin/yarn-daemon.sh --config $HADOOP_CONF_DIR start nodemanager