IBM Support

JR55658: CONCURRENT CALLS TO REST API ASSIGNTOME MIGHT OVERWRITE EACH OTHER

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APAR status

  • Closed as program error.

Error description

  • If multiple authorized users call the assignToMe REST API
    function at the same time, IBM Business Process Manager (BPM)
    might assign the task to the caller whose request is processed
    last but not send the other callers exceptions. As a result, all
    users might start working on the task. Furthermore, the first
    caller is unable to complete the task because he or she is
    meanwhile not the task owner anymore.
    
       If two different users call task.reassignTo function at the
    same time, it seems that the second call overwrites the first
    call and gets the ownership of the task. If we do the same call
    from bpm rest api, the second user can not get the task.
    
    task.reassignTo(tw.system.org.findUserByName(userName));
    

Local fix

Problem summary

  • Because checking the authorization and claiming a task are not
    done in one operation, the authorization check could be
    successful for multiple users, which could lead to multiple
    updates on the task instance.
    

Problem conclusion

  • A fix is/will be available for IBM BPM V8.5.5.0 that ensures the
    assignToMe REST API call checks authorization and changes the
    task owner in one operation.
    
    On Fix Central (http://www.ibm.com/support/fixcentral), search
    for JR55658:
    
    1. Select IBM Business Process Manager with your edition from
      the product selector, the installed version to the fix pack
      level, and your platform, and then click Continue.
    
    2. Select APAR or SPR, enter JR55658, and click Continue.
    
    When you download fix packages, ensure that you also download
    the readme file for each fix. Review each readme file for
    additional installation instructions and information about the
    fix.
    

Temporary fix

  • Not applicable
    

Comments

APAR Information

  • APAR number

    JR55658

  • Reported component name

    BPM ADVANCED

  • Reported component ID

    5725C9400

  • Reported release

    855

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-04-05

  • Closed date

    2016-05-24

  • Last modified date

    2016-06-06

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    BPM STANDARD

  • Fixed component ID

    5725C9500

Applicable component levels

  • R855 PSY

       UP

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Document Information

Modified date:
06 June 2016