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PM95042: cleartool: Warning: Unable to get explicit composite baseline

Fixes are available

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APAR status

  • Closed as program error.

Error description

  • Summary:
    ----------
    While rebasing a stream which has foundations on multitple
    composite baselines
     the user may receive multiple occurrences of
    
    cleartool: Warning: Unable to get explicit composite baseline
    
    which has unclear meaning and makes the other command output
    extremely difficult to read.
    ----------
    
    
    Steps to reproduce:
    This issue is reproducible only in very complex UCM
    environments, so full details
    on reproducing it from scratch are omitted.
    
    1. The UCM must be configured using composite baselines from
    multiple other projects.
    2. The other projects must be configured using common shared
    components
    
    Rebase a stream onto a composite baseline
    (Prj_A_v7r1m2f9_Comp_A) that overrides or augments a component
    (Comp_A) foundation in the current configuration.
    If this component contains a dependency on a component
    (SubComp_1) that is already in the stream's configuration
       through dependency of a composite baseline
    (Prj_B_v7r1m2f8_Comp_B) in some OTHER component (Comp_B)
       AND Prj_A_v7r1m2f9_Comp_A and Prj_B_v7r1m2f8_Comp_B depend on
    different baselines of SubComp_1,
       then 'rebase' shall detect a 'conflict' and log the
    following:
    ---------------------
    cleartool: Error: Conflicts in configuration:
      Component 'SubComp_1@/vobs/pvob'  baselines:
        'v7r1m2f9_Prj_A_SubComp_1@/vobs/pvob' (member of
    'Prj_A_v7r1m2f9_Comp_A@/vobs/pvob')
        'v7r1m2f8_Prj_B_SubComp_1@/vobs/pvob' (member of
    'Prj_B_v7r1m2f8_Comp_B@/vobs/pvob')
    cleartool: Error: Unable to rebase stream 'prj_1.0_int'.
    ---------------------
    
    Now suppose there is also a Comp_C developed in Prj_C, which
    also depends on SubComp_1
      but the foundation in use by stream 'prj_1.0_int' also depends
    on baseline 'v7r1m2f8_Prj_B_SubComp_1'
    Then our attempt to rebase stream 'prj_1.0_int' onto baseline
    'Prj_A_v7r1m2f9_Comp_A' of component 'Comp_A',
     instead of failing with
    ---------------------
    cleartool: Error: Conflicts in configuration:
      Component 'SubComp_1@/vobs/pvob'  baselines:
        'v7r1m2f9_Prj_A_SubComp_1@/vobs/pvob' (member of
    'Prj_A_v7r1m2f9_Comp_A@/vobs/pvob')
        'v7r1m2f8_Prj_B_SubComp_1@/vobs/pvob' (member of
    'Prj_B_v7r1m2f8_Comp_B@/vobs/pvob','Prj_C_v7r1m2f8_Comp_C@/vobs/
    pvob')
    cleartool: Error: Unable to rebase stream 'prj_1.0_int'.
    ---------------------
     or
    ---------------------
    cleartool: Error: Conflicts in configuration:
      Component 'SubComp_1@/vobs/pvob'  baselines:
        'v7r1m2f9_Prj_A_SubComp_1@/vobs/pvob' (member of
    'Prj_A_v7r1m2f9_Comp_A@/vobs/pvob')
        'v7r1m2f8_Prj_B_SubComp_1@/vobs/pvob' (member of ***
    multiple composite baselines ***)
    cleartool: Error: Unable to rebase stream 'prj_1.0_int'.
    ---------------------
     will actually fail with
    ---------------------
    cleartool: Error: Conflicts in configuration:
      Component 'SubComp_1@/vobs/pvob'  baselines:
        'v7r1m2f9_Prj_A_SubComp_1@/vobs/pvob' (member of
    'Prj_A_v7r1m2f9_Comp_A@/vobs/pvob')
    'v7r1m2f8_Prj_B_SubComp_1@/vobs/pvob'
    cleartool: Warning: Unable to get explicit composite baseline
    cleartool: Error: Unable to rebase stream 'prj_1.0_int'.
    ---------------------
    
    If the rebase is introducing conflicts in multiple components,
    and/or the dependency paths of common components are
    the output be quickly becomes useless / unreadable.
    
    
    Workaround:
    
    Write some scripting to extract the useful parts of the message
    from the useless parts.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of IBM Rational ClearCase UCM.                         *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * While rebasing an IBM Rational ClearCase stream which has    *
    * foundations on multiple composite baselines, the user may    *
    * receive multiple occurrences of the message                  *
    * "cleartool: Warning: Unable to get explicit composite        *
    * baseline"                                                    *
    * which has unclear meaning and makes the other command output *
    * extremely difficult to read.                                 *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • A fix is available in ClearCase versions 8.0.0.13 and 8.0.1.6
    
    More detailed error reporting can be enabled by setting a
    special environment variable, CCASE_EXPANDED_MSGS to any
    non-empty string. If CCASE_EXPANDED_MSGS is empty or
    non-existent, the behavior and messages are unchanged.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM95042

  • Reported component name

    CLEARCASE UNIX

  • Reported component ID

    5724G2901

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-14

  • Closed date

    2014-12-16

  • Last modified date

    2014-12-16

  • 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

    CLEARCASE WIN

  • Fixed component ID

    5724G2900

Applicable component levels

  • R800 PSY

       UP

  • R801 PSY

       UP

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0"}]

Document Information

Modified date:
16 June 2021