Application has crashed alarm triggers on NSX Manager, with core.GC core dump file on the node

Products

• VMware NSX

Issue/Introduction

• Alarm "Application on NSX node {node_display_or_host_name} has crashed. The number of core files found is {core_dump_count}." triggers on NSX Manager.
• A core dump file was generated into Manager's /var/log/core directory, file name will be like "core.GC task thread#.<thread_id>.<process_id>.<service_user_id>.<id>"

Environment

• VMware NSX-T Data Center (any release)
• VMware NSX (any release)

Cause

• "core.GC task thread" is a benign core dump created by jstack process running on the Manager.

Resolution

This core dump file can be safely removed.

Workaround:

1. 1. SSH into the nsx manager using the admin user.
   2. Remove all core-dump files in the core file paths using the below command:
      • nsxcli> del core-dump all
   3. To delete specific core-dump files, run the following command:
      • nsxcli> get core-dump #This command will list all core-dump files.
      • nsxcli> del core-dump <core-dump-file> #Specify the name of the core-dump file

Note:  if the core-dump file name contains a space, the above CLI command will not work.  Please SSH into the NSX manager as root and delete the core-dump file manually

              #rm /var/log/core/<core-dump-file>