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WMQ fails to create or start the queue manager on AIX with the problem ID XC037021

Technote (troubleshooting)


You install or upgrade to Websphere MQ (WMQ) V7.1 or newer version on AIX platform. Then, you try to create a queue manger or start an existing queue manger, but it fails and an FDC file is generated.


The FDC file with the problem ID XC037021 is generated.

From the FDC file, you can see the following environment variable is set (at the bottom of the FDC, under the section "Environment Variables:").



This issue is caused by AMQ_SIGCHLD_SIGACTION.
It is an undocumented variable created for WMQ V5.3. For WMQ 7.1 or newer version, there is no need to set this variable.


WMQ 7.1/7.5/8.0 on AIX

Resolving the problem

Remove the environment variable AMQ_SIGCHLD_SIGACTION.

Product Alias/Synonym

WebSphere MQ WMQ

Document information

More support for: WebSphere MQ

Software version: 7.1, 7.5, 8.0

Operating system(s): AIX

Software edition: All Editions

Reference #: 1628314

Modified date: 13 February 2015