https://community.cloudera.com/t5/Support-Questions/Unable-to-start-the-node-manager/m-p/286227#M212302 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/19178">@saivenkatg55</a>&nbsp;</P><P>I have tried to analyze your situation but with access to the Linux box it rather difficult,but I think there is a workaround.</P><P>&nbsp;</P><P>The&nbsp;<STRONG>chattr</STRONG> linux command makes important files IMMUTABLE (Unchangeable).</P><P>&nbsp;</P><P>The immutable bit [&nbsp;<STRONG>+i</STRONG>&nbsp; ] can only be set by superuser (i.e root) user or a user with sudo privileges can be able to set. This will prevent the file from being deleted forcefully, renamed or change the permissions, but it won’t be allowed says '<FONT color="#FF0000">Operation not permitted</FONT>“'</P><P><STRONG><FONT color="#FF6600"># ls -al /var/run/hadoop-yarn/yarn/</FONT></STRONG><BR />total 8<BR />.<BR />..<BR />-rw-r--r-- 1 yarn hadoop 0 Dec 24 09:34 hadoop-yarn-nodemanager.pid</P><P>&nbsp;</P><P><STRONG>Set immutable bit</STRONG></P><P><FONT color="#FF6600"><STRONG># chattr +i hadoop-yarn-nodemanager.pid</STRONG></FONT></P><P>&nbsp;</P><P><STRONG>Verify the attribute with command the below command</STRONG></P><P><STRONG><FONT color="#FF6600"># lsattr</FONT></STRONG><BR />----i--------e-- ./hadoop-yarn-nodemanager.pid</P><P>&nbsp;</P><P><STRONG>The normal ls command shows no difference</STRONG></P><P><STRONG><FONT color="#FF6600"># ls -al /var/run/hadoop-yarn/yarn/</FONT></STRONG><BR />total 8<BR />drwxr-xr-x 2 root root 4096 Dec 24 09:34 .<BR />drwxr-xr-x 3 root root 4096 Dec 24 09:34 ..<BR />-rw-r--r-- 1 yarn hadoop 0 Dec 24 09:34 hadoop-yarn-nodemanager.pid</P><P>&nbsp;</P><P><STRONG>Deletion protection</STRONG></P><P><STRONG><FONT color="#FF6600"># rm -rf /var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid</FONT></STRONG><BR />rm: cannot remove ‘/var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid’: <FONT color="#FF0000">Operation not permitted</FONT></P><P>&nbsp;</P><P><STRONG>Permission change&nbsp; protected</STRONG><BR /><FONT color="#FF6600"><STRONG># chmod 755&nbsp; /var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid</STRONG></FONT><BR />chmod: changing permissions of ‘/var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid’: <FONT color="#FF0000">Operation not permitted</FONT></P><P><BR /><BR /><STRONG>How to unset attribute on Files</STRONG></P><P><STRONG><FONT color="#FF6600"># chattr -i /var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid</FONT></STRONG></P><P>After resetting permissions, verify the immutable status of files using lsattr command</P><P><FONT color="#FF6600"><STRONG># lsattr</STRONG></FONT></P><P>---------------- ./var/run/hadoop-yarn/yarn/hadoop-yarn-nodemanager.pid</P><P>&nbsp;</P><P>Please do that and revert&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Tue, 24 Dec 2019 09:06:15 GMT Shelton 2019-12-24T09:06:15Z