Retain Server Errors with Too Many Open Files

Retain server fails with error messages in the log files.

00:23:23, 526[RTWQuartzScheduler_Archive_Worker-1] [ERROR] DefaultCAAPIErrorHandleStrategy: reportError: processMailbox :: com.gwava.workerutils.DefaultCAAPIErrorHandleStrategy.returnCaller:55 :: java.lang.IllegalStateException: 
 java.io.FileNotFoundException: /opt/beginfinite/retain/RetainWorker2/WEB-INF/lib/EasyGoogleApps.jar (Too many open files)
00:23:23, 526[RTWQuartzScheduler_Archive_Worker-1] [ERROR] StandardErrorHandleStrategy: reportError: WorkerJob :: com.gwava.caapi.process.RetainDredger.processMailboxes:429 :: com.gwava.archive.exceptions.RetainWorkerException: com.gwava.archive.exceptions.RetainWorkerException: java.lang.IllegalStateException: 
 java.io.FileNotFoundException: /opt/beginfinite/retain/RetainWorker2/WEB-INF/lib/EasyGoogleApps.jar (Too many open files),

Increase the number of allowed open files for the Retain systemd process.

1. Login as root on the SLES12 server with Retain
2. Run mkdir -p /etc/systemd/system/retain.service.d
3. Create /etc/systemd/system/retain.service.d/override.conf
4. Add the following to the override.conf file:

[Service]
LimitNOFILE=60000

5. Save and quit
6. Run systemctl deamon-reload

Confirm the Retain daemon has more files descriptors available:

# systemctl show retain.service | grep LimitNOFILE
LimitNOFILE=60000

The number of allowable open files for the Retain systemd process was insufficient.