First failure support technology ( FFST) in WebSphere MQ classes for JMS

If a serious internal error occurs within WebSphere® MQ classes for JMS, first failure support technology ( FFST) information is generated.

The FFST information is written to a file is called JMSCnnnn.FDC, where nnnn is a four digit number. This file is in a directory called FFDC, which is a subdirectory of the directory to which trace output is written. By default, trace output is written to the current working directory, but you can redirect trace output to a different directory by setting the com.ibm.msg.client.commonservices.trace.outputName property in the WebSphere MQ classes for JMS configuration file. For information about the WebSphere MQ classes for JMS configuration file, see The IBM WebSphere MQ classes for JMS configuration file.

If tracing is enabled when FFST information is generated, the FFST information is also be written to the trace file. For more information about tracing JMS programs, see Tracing IBM® WebSphere MQ classes for JMS applications.

To suppress the production of FFDC files, set the property com.ibm.msg.client.commonservices.ffst.suppress, as follows:

0: Output all FFDC files (default).
-1: Output only the first FFDC files of a particular type.
integer: Suppress all FFDC files except those that are a multiple of this number.