We have uncovered (with the assistance of one of our customers) a potential issue when running HostBridge for zIIP (HBz) version 6.62.
In the HBz infrastructure shipped with v6.62, it is possible under high load situations for module HBZIQPRC to issue a message indicating that the call to IWM4EDEL has completed with a return code of 4 and a reason code of x'xxxx0411'. This means: "INPUT ENCLAVE HAD 1 OR MORE SRBS SCHEDULED OR RUNNING, OR 1 OR MORE TCBS JOINED TO THE ENCLAVE." This is only an information condition. Thus, producing a message is unwarranted and may cause the CICS system log to be unnecssarily voluminous.
This issue is resolved by application of a patch to HostBridge load module HBZIQPRC. It will eliminate the messages by raising the standard for messages to be displayed following a call to IWM4EDEL (which deletes an enclave). Messages will only be displayed if the return code is > 4.
This patch is only applicable to HostBridge version 6.62. The changes made by the patch will be incorporated into the standard HostBridge code base in the next version of the product.
Sample JCL to install the patch may be found here: HostBridge_Patch_20140105.txt
Please contact HostBridge Support if you have any questions about this fix.