@Raj77 The most potential error message is this: OSError: Cannot initialize new instance of inotify, Errno=Too many open files (EMFILE) This states that there are so many open file descriptor so that agent is not able to handle this. One easy way to mitigate this by hard stop/start agent using the doc.    Then comes to the second error about DnsTest. [17/Dec/2020 11:31:05 +0000] 9333 DnsResolutionMonitor throttling_logger ERROR Failed to run DnsTest. This seems and issue with your java installation most probably you should remove offending packages (mostly openjdk) from the host and some broken (zero bytes or red) alternatives from /var/lib/alternatives and /etc/alternatives, and restart the CM agent. ... View more

If I understand your response, you have an NFS Server that’s timing out and clock offsets are out of sync.  For the former, the NFS admin needs to address this. It’s not typical to run NFS on a Namenode BTW.  For time sync, you need to be running NTP or chrony ... View more

Thanks for your response.  we are configuring 60000.  present it is ok  ... View more