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Understanding NFO Processes

This section provides information on the essential NFO processes you can monitor.

To monitor NFO processes on Linux, use the ps command with the -eo pid,ppid,comm options.

  • NFO server: nfc_svr
  • NFO controller: jsvc/tomcat (two tomcat processes)
  • EDFN: jsvc/updater (two processes, the first one - service that monitors the second one - EDFN java process)
  • HSQLDB - configuration database: java/hsqldb

NFO server (nfc_svr)​

Viewing NFO server process:

# ps -eo pid,ppid,comm | grep nfc_svr

NFO Controller (jsvc/tomcat)​

There are two tomcat jsvc processes:

  • Parent Process: Monitors the Tomcat server process.
  • Tomcat Server Process: Handles NFO's web interface and core functionalities.

Viewing Tomcat Processes:

# ps -eo pid,ppid,args | grep jsvc | grep tomcat

Example Output:

22189       1 jsvc.exec -cwd /opt/flowintegrator/tomcat/bin/ ...
22191   22189 jsvc.exec -cwd /opt/flowintegrator/tomcat/bin/ ...

Explanation:

  • Process 22189: Parent jsvc process, responsible for monitoring the Tomcat server.
  • Process 22191: Tomcat server process, handling NFO's core functionality.

If the Tomcat server process (22191) becomes unresponsive, the parent process (22189) will automatically restart it.

EDFN (jsvc/updater)​

There are two EDFN jsvc processes:

  • Parent Process: Monitors the EDFN process.
  • EDFN Process: Handles EDFN functionalities.

Viewing EDFN Processes:

#ps -eo pid,ppid,args | grep jsvc | grep updater

Example Output:

23664       1 jsvc.exec -cwd /opt/nfi-updater/bin/ ...
23665   23664 jsvc.exec -cwd /opt/nfi-updater/bin/ ...

Explanation:

  • Process 23664: Parent jsvc process, responsible for monitoring the EDFN process.
  • Process 23665: EDFN process, handling EDFN functionality.

If the EDFN process (23665) becomes unresponsive, the parent process (23664) will automatically restart it.

HSQLDB - configuration database (java/hsqldb)​

Viewing HSQLDB Processes:

# ps -eo pid,ppid,args | grep java | grep hsqldb