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JR43880: NULLPOINTEREXCEPTION OCCURS CAUSING APPLICATION INSTANCE TO FAIL

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APAR status

  • Closed as program error.

Error description

  • If a variable in a business process diagram (BPD) is exposed as
    "Available in search" (in Process Designer), then when an
    instance of the BPD is executed, the first modification of that
    variable succeeds, but any subsequent modification to any
    variable other than the original causes the process instance to
    fail with no visible error message.  In SystemOut.log (on the
    server or cluster where the process application is deployed), a
    NullPointerException with a stack trace similar to the following
    is written:
    
    wle_ucaexcept E  CWLLG0181E:An exception occurred during
    execution of task 1,239.  Error: java.lang.NullPointerException
    
    com.lombardisoftware.core.TeamWorksException:
    java.lang.NullPointerException
    at
    com.lombardisoftware.core.TeamWorksEx
    ception.asTeamWorksException(TeamWorksException.java:130)
    at
    com.lombardisoftware.bpd.runtime.engine
    .quartz.AbstractBpdTask.execute(AbstractBpdTask.java:129)
    ...
    Caused by:
    java.lang.NullPointerException
    at
    om.lombardisoftware.bpd.runtime.engine.
    BPDInstanceDAO.processSearchableField(BPDInstanceDAO.java:1166)
    at
    com.lombardisoftware.bpd.runtime.engine
    .BPDInstanceDAO.getSearchableValues(BPDInstanceDAO.java:1067)
    at
    com.lombardisoftware.bpd.runtime.engine
    .BPDInstanceDAO.saveSearchableValues(BPDInstanceDAO.java:593)
    at
    com.lombardisoftware.bpd.runtime.engine
    .BPDInstanceDAO.save(BPDInstanceDAO.java:251)
    ...
    at
    com.lombardisoftware.server.core.TXComm
    and.execute(TXCommand.java:69)
    at
    com.lombardisoftware.bpd.runtime.engine
    .quartz.AbstractBpdTask.execute(AbstractBpdTask.java:100)
    ... 14 more
    

Local fix

  • from L3:
    I made a null pointer check code change in BPDInstanceDAO class
    and was able to complete the task without an issue except the
    (PFS-0065) errors which is pdw related.
    
    Code change snippet
    
    else if (lastModificationTime == null || (modificationTime !=
    null && (modificationTime.compareTo(lastModificationTime) >
    0))) {
                    updateValue = true;
                }
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of BPM Express, BPM Standard and BPM  *
    *                  Advanced.                                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: If a variable in a business process     *
    *                      diagram (BPD) is exposed as             *
    *                      "Available in search" (in Process       *
    *                      Designer), then when an                 *
    *                      instance of the BPD is executed, the    *
    *                      first modification of that variable     *
    *                      succeeds, but any subsequent            *
    *                      modification to any variable other      *
    *                      than the original causes the process    *
    *                      instance to fail with no visible error  *
    *                      message.  In SystemOut.log (on the      *
    *                      server or cluster where the process     *
    *                      application is deployed), a             *
    *                      NullPointerException with a stack       *
    *                      trace similar to the following is       *
    *                      written:                                *
    *                      wle_ucaexcept E  CWLLG0181E:            *
    *                      An exception occurred during            *
    *                      execution of task 1,239.  Error:        *
    *                      java.lang.NullPointerException          *
    *                      com.lombardisoftware.core.TeamWorksExce *
    *                      ption:                                  *
    *                      java.lang.NullPointerException          *
    *                      at                                      *
    *                      com.lombardisoftware.core.TeamWorksEx   *
    *                      ception.asTeamWorksException(TeamWorksE *
    *                      xception.java:130)                      *
    *                      at                                      *
    *                      com.lombardisoftware.bpd.runtime.engine *
    *                      .quartz.AbstractBpdTask.execute(Abstrac *
    *                      tBpdTask.java:129)                      *
    *                      ...                                     *
    *                      Caused by:                              *
    *                      java.lang.NullPointerException          *
    *                      at                                      *
    *                      om.lombardisoftware.bpd.runtime.engine. *
    *                      BPDInstanceDAO.processSearchableField(B *
    *                      PDInstanceDAO.java:1166)                *
    *                      at                                      *
    *                      com.lombardisoftware.bpd.runtime.engine *
    *                      .BPDInstanceDAO.getSearchableValues(BPD *
    *                      InstanceDAO.java:1067)                  *
    *                      at                                      *
    *                      com.lombardisoftware.bpd.runtime.engine *
    *                      .BPDInstanceDAO.saveSearchableValues(BP *
    *                      DInstanceDAO.java:593)                  *
    *                      at                                      *
    *                      com.lombardisoftware.bpd.runtime.engine *
    *                      .BPDInstanceDAO.save(BPDInstanceDAO.jav *
    *                      a:251)                                  *
    *                      ...                                     *
    *                      at                                      *
    *                      com.lombardisoftware.server.core.TXComm *
    *                      and.execute(TXCommand.java:69)          *
    *                      at                                      *
    *                      com.lombardisoftware.bpd.runtime.engine *
    *                      .quartz.AbstractBpdTask.execute(Abstrac *
    *                      tBpdTask.java:100)                      *
    *                      ... 14 more                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Code that is tracking modifications to searchable variables
    (for the Performance Data Warehouse) was not checking for a
    null modification time in a comparison with the previous
    modification time (to determine if a searchable variable was
    updated); it was assuming the variable was modified,
    resulting in the NullPointerException.  (Prior to and
    including the first modification of a searchable variable, a
    check for a null previous modification time was short
    circuiting the check for current modificaton time and
    therefore the issue did not occur in those cases.)
    

Problem conclusion

  • Adding a check for null modification time to the code
    mentioned in the Problem Summary resolved the issue.
    
    An interim fix for Business Process Manager Version 7.5.1.0 has
    been published to Fix Central.  Please refer to the separate
    file that is automatically downloaded with the interim fix
    for prerequisite information and installation/uninstallation
    instructions.
    
    Additionally, Business Process Manager Version 7.5.1 Fix Pack
    1 (7.5.1.1) contains the fix for this issue.
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR43880

  • Reported component name

    BPM STANDARD

  • Reported component ID

    5725C9500

  • Reported release

    751

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-08-23

  • Closed date

    2012-11-06

  • Last modified date

    2012-11-06

  • 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

  • R750 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSFTDH","label":"IBM Business Process Manager Standard"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5.1","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
06 November 2012