Dumping on data loss (804–type) conditions

The new DIAG option on the IXGINVNT service and IXCMIAPU TYPE(LOGR) utility along with the new DIAG options on the IXGCONN, IXGDELET and IXGBRWSE services allow additional diagnostic data to be obtained when a log stream loss of data condition is encountered.

The following shows the default settings for all the services and the relationship between the service specifications in terms of whether or not Logger will request a dump for certain loss of data type conditions.

Default settings:

     DEFINE LOG STREAM     DIAG(NO)
      IXGCONN (CONNECT)     DIAG(NO_DIAG)
       IXGBRWSE (START)      DIAG(NO_DIAG)
       IXGDELET              DIAG(NO_DIAG)

Assuming a data loss (804) type condition was encountered on an IXGDELET request or on any IXGBRWSE request for a browse session, the following shows whether or not a dump would be taken by Logger for this condition, where:

No: No dump is taken for the condition.

Yes: Dump is taken for the condition.

   DEFINE LOG STREAM                 NO                  YES
                             -----------------    -----------------
   IXGCONN CONNECT           NO_DIAG  NO   YES    NO_DIAG  NO   YES
   ----------------------------------------------------------------

   IXGBRWSE START  NO_DIAG     no     no   no       no     no   yes
                   NO          no     no   no       no     no   no
                   YES         no     no   no       yes    no   yes

   IXGDELET        NO_DIAG     no     no   no       no     no   yes
                   NO          no     no   no       no     no   no
                   YES         no     no   no       yes    no   yes

Note: The specification on DIAG(YES) in the log stream definition also results in additional non-abend diagnostics being collected for the log stream. For more information, see 'Enabling additional log stream diagnostics' in z/OS MVS Diagnosis: Reference.