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Dialogic® PowerMedia™ Extended Media Server (PowerMedia XMS) - more articles

How to collect core dump from xmsrest process?

Symptom:

When troubleshooting an issue where the Dialogic® PowerMedia™ XMS xmsrest service has crashed, it is useful to supply Dialogic technical services and support team a core file for analysis.  However, what is observed after the xmsrest services crashed is that there is no core file found on the PowerMedia XMS server.

Reason for the issue:

By default, PowerMedia XMS processes do not generate crash dumps. Each process needs to be enabled to generate a core dump.

How to configure the process to generate a core dump? 

In this case, the ability to generate a core dump will be enabled for the for xmsrest process.

• Login to XMS via ssh and then open the file /etc/sysconfig/xmsrest
• Carefully add "ulimit -c unlimited" without quotes.
• Save the file and restart xms.

Please note:

If the server where PowerMedia XMS is installed does not have linux abrtd (Automatic Bug Reporting Tool) installed, the core should be stored under / folder.

If the abrtd deamon is installed, it will *delete* the core automatically unless the configuration of abrtd deamon is changed and the daemon restarted.   The changes required to the abrtd daemon are outlined below:    

• Edit the file /etc/abrt/abrt-action-save-package-data.conf.   
• Set OpenGPGCheck = no 
• ProcessUnpackaged = yes.
• Save the file and restart abrtd deamon (service abrtd start)

When the core happens, there will be a message in /var/log/messages that shows where the core is stored.

For example:

June 22 11:05:41 xms abrt[16589]: Saved core dump of pid 36460 (/usr/bin/xmsrest) to /var/spool/abrt/ccpp-2014-06-22-11:05:41-36460 (50025210 bytes)

Product List

Dialogic® PowerMedia™ Extended Media Server (XMS) version 2.3 or earlier.