Dumps contain diagnostic information that can be used when investigating system problems. Various options are available when obtaining dumps.
Dump options are available for use with the MVS™ system command /F <JOBNAME>,APPL=DUMP.
/F <JOB_NAME>,APPL=DUMP,?
If the IBM® JVM is used, a subset of the options can be used to provide JVM dumps. The IBM JVM can produce a Java™ heap dump, a Java dump, or a Java system dump. These are produced by a running JVM, and can be requested during typical operation of the CICS® Transaction Gateway. The dumps contain diagnostic information that can be used when investigating system problems.
For further information
on IBM JVM dumps, see the IBM Java Diagnostic
Guide at IBM Java Diagnostic Guide.
There are no short forms of the parameter names.
Option | Description |
---|---|
ALL | Generates all dumps. This option must be specified as the only option and cannot be combined with other dump options. |
CTGINFO | Generates a dump containing information about the configuration of CICS Transaction Gateway. |
HEAP | Generates a Java heap dump. |
JAVA | Generates a Java dump. |
JVM | Generates a dump containing current JVM memory usage. |
JVMSTACK | Generates a dump containing only the Java call stack. |
SYSTEM | Generates a Java system dump. |
The Gateway daemon responds to a dump request with a message to the console. In some cases, if the request takes a long time to complete, the message NO RESPONSE RECEIVED is output, although the dump is produced. The stderr log contains the location of the dump.
Messages from the JVM contain the name of the dump, and indicate whether the dump was successful. The JVM messages are sent to the stderr error stream.
Possible responses to the dump request are as follows: