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Status Future consideration
Workspace IMS System Services
Categories Commands
Created by Guest
Created on Sep 17, 2018

RELATED IDEAS

Refresh application programs in a MPR with persistent JVM

IMS with MPP with persistent JVM. CANCEL_PGM=NO and COBOL main transaction programs calling JAVA methods via COBOL Object Oriented Wrapper and JNI APIs.
The Language Environment enclave remains active during all the MPR lifetime in order to keep the JVM persistent. Consequently, all COBOL routines loaded (and their related working storages) remain allocated and reused during all the MPR lifetime.
On the other hand this requires a recycle of the IMS MPP when a COBOL program used into IMS JAVA regions is recompile to refresh the module.
CANCEL_PGM=YES is not an option in a production environment for both performance and CPU consumption.
We would like a way to avoid the dependent region restart to implement changes to the application, in summary by points:
1) refresh COBOL sub-programs loaded in a MPP with JVM. Actually this can only be done by:
- coding CANCEL_PGM=Y
- terminating the LE enclave (ABEND), restart of
the dependent region
2) refresh the JAVA program loaded in the JVM of a MPP. Actually this can only be done with a recycle of the JVM that occurs:
- at dependent region restart
- LE enclave termination
- at ABEND because this causes the LE enclave to
terminate
A command would be accepted as a solution.

Idea priority High
  • Guest
    Reply
    |     Jul 8, 2019

    Thank you for your interest in keeping IMS a vital and successful product. Software development has continuously evolved during IMS's lifetime, and so has IMS itself. We have kept pace with, adopted, and implemented many industry standard best practices within our organization, including Continuous Delivery, Design Thinking, and Agile.

    When choosing new features to add from the list of requirements in our backlog, we assess which will bring the most value to as many clients as possible and prioritize those.

    After reviewing this request for enhancement and assessing its potential value, our decision is to add this item to our backlog. Items in our backlog are expected to start working within the next 18 months. We reserve the right to re-prioritize or reject our backlog items as new requests come in. This helps ensure that we are constantly focused on providing the best value to all of our clients.

    Have a great day!
    Haley Fung - hfung@us.ibm.com

  • Guest
    Reply
    |     Jan 14, 2019

    Hello,

    we would like to see the Java PGM refresh also for JMPs.

    Best regards,
    Robert Recknagel.

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