IBM Support

PI32551: INTERMITTENT KERNEL PANIC ON RHEL WHEN RUNNING CLEARTOOL WITHIN A BUILD.

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APAR status

  • Closed as program error.

Error description

  • While performing a build on RedHat Enterprise Linux and IBM
    Rational ClearCase (versions 8.0.0.9 or 8.0.1.2 and later) the
    kernel will intermittently panic and the machine reboots.
    The panic is seen in the mvfs xdr routine:
    PID: XXXX  TASK: ffff880425ea16c0  CPU: 3   COMMAND: "cleartool"
    #0 [ffff88008a22f198] machine_kexec at ffffffff81041181
    #1 [ffff88008a22f1f0] crash_kexec at ffffffff810cf0e2
    #2 [ffff88008a22f2c0] oops_end at ffffffff815ea548
    #3 [ffff88008a22f338] __bad_area_nosemaphore at ffffffff815daff9
    #4 [ffff88008a22f380] bad_area at ffffffff815db377
    #5 [ffff88008a22f3a8] __do_page_fault at ffffffff815ed4ac
    #6 [ffff88008a22f4a8] do_page_fault at ffffffff815ed58a
    #7 [ffff88008a22f4d0] page_fault at ffffffff815e97c8
        [exception RIP: xdr_string+90]
        RIP: ffffffffa042995e  RSP: ffff88008a22f580  RFLAGS:
    00210286
        RAX: 0000000000000000  RBX: ffff88008a22f5d8  RCX:
    ffffffffffffffff
        RDX: 00000000000000ff  RSI: ffff880041b22b68  RDI:
    0000000000000000
        RBP: ffff88008a22f5a8   R8: ffff880041b22b00   R9:
    0000000000000001
        R10: ffff88022b88003e  R11: ffffffffa04341da  R12:
    0000000000000000
        R13: 00000000000000ff  R14: ffffffffa042703f  R15:
    ffff88022b880058
        ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
    #8 [ffff88008a22f5b0] xdr_view_lookup_req_t at ffffffffa0424bb4
    [mvfs]
    #9 [ffff88008a22f5d0] mvfs_linux_xdr_encode_view_lookup at
    ffffffffa0427089 [mvfs]
    
    This occurs in rare conditions where we hit a race condition
    while performing a lookup on a history mode name.
    
    WORKAROUND:
    None.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of Rational ClearCase accessing files with "@@" in the *
    * pathname.                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * When ClearCase functions are parsing a pathname containing   *
    * "@@", the user might experience a kernel panic, and the      *
    * kernel function xdr_string() will be in the stack trace.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • This defect is fixed in ClearCase 8.0.0.14 and 8.0.1.7.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI32551

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    801

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-01-12

  • Closed date

    2015-03-19

  • Last modified date

    2015-06-01

  • 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 PSN

       UP

  • R801 PSN

       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":"801"}]

Document Information

Modified date:
17 June 2021