https://community.cloudera.com/t5/Support-Questions/Unable-to-start-the-node-manager/m-p/286079#M212207 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/20288">@Shelton</a>&nbsp;I tried the below solution even though the pid file created with 444 permission upon multiple restarts.</P><P>&nbsp;</P><P>-r--r--r-- 1 yarn hadoop 6 Dec 20 05:00 hadoop-yarn-nodemanager.pid</P><P>&nbsp;</P><P>Still the above issue is persisting&nbsp;</P><P>&nbsp;</P><P>resource_management.core.exceptions.ExecutionFailed: Execution of 'ulimit -c unlimited; export HADOOP_LIBEXEC_DIR=/usr/hdp/3.0.1.0-187/hadoop/libexec &amp;&amp; /usr/hdp/3.0.1.0-187/hadoop-yarn/bin/yarn --config /usr/hdp/3.0.1.0-187/hadoop/conf --daemon start nodemanager' returned 1. -bash: line 0: ulimit: core file size: cannot modify limit: Operation not permitted<BR />/usr/hdp/3.0.1.0-187/hadoop/libexec/hadoop-functions.sh: line 1847: /var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid: Permission denied<BR />ERROR: Cannot write nodemanager pid /var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid.<BR />/usr/hdp/3.0.1.0-187/hadoop/libexec/hadoop-functions.sh: line 1866: /var/log/hadoop-yarn/yarn/hadoop-yarn-nodemanager-Hostname.org.out: Permission denied</P> Fri, 20 Dec 2019 10:07:09 GMT saivenkatg55 2019-12-20T10:07:09Z