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IT14101: SERVER PROCESSES MIGHT HANG WHILE ADMSERVERMONITORTHREAD IS IN ADMGETFRONTENDCAPACTIY

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Process and session hang symptoms might be observerd if the
    Tivoli Storage Manager AdmServerMonitorThread is waiting for
    locks in the resource intensive admGetFrontEndCapactiy
    processing.
    
    See the following pstack example collected on a Linux box:
    pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
    pkWaitConditionTracked (condP=<optimized out>, mutexP=<optimized
    out>, abstime=0, file=0x137d639 "tmlock.c", line=2214) at
    pkmon.c:1221
    WaitForLock (file=0x11d0a48 "imfs.c", lineNum=3964,
    lockP=0x7ffefc0af1f8, holdP=<optimized out>,
    txnP=0x7fff24000918, type=19002, nameSpace=0, key=0x7fffa09ffbc0
    "11.2", keyLen=4, mode=4 '\004', escalation=False) at
    tmlock.c:2214
    tmLockTracked (file=0x11d0a48 "imfs.c", lineNum=3964,
    txnId=0x7fff24000918, type=19002, nameSpace=0,
    key=0x7fffa09ffbc0 "11.2", keyLen=4, mode=4 '\004',
    condition=UnconditionalLock) at tmlock.c:750
    ImLockFsIdTracked (file=0x11d0a48 "imfs.c", lineNum=3964,
    txnId=0x7fff24000918, nodeId=11, fsId=2, lockMode=<optimized
    out>) at imutil.c:10530
    ImLockFileSpaceTracked (file=0x11d0a48 "imfs.c", lineNum=3964,
    txnId=0x7fff24000918, nodeId=11, fsId=2, lockMode=4 '\004') at
    imutil.c:10604
    imUpdateFsFrontEndCapacity (txnId=0x7fff24000918, nodeId=11,
    fsId=2, feCapacity=7234299501) at imfs.c:3964
    admGetFrontEndCapactiy (frontEndCap=0x7fffa09ffe20,
    frontEndClientCount=0x7fffa09ffe7c,
    lastFECapDate=0x7fffa09ffe30) at admutil.c:5740
    AdmServerMonitorThread (argP=<optimized out>) at admstart.c:4839
    StartThread (startInfoP=0x0) at pkthread.c:3779
    start_thread () from /lib64/libpthread.so.0
    clone () from /lib64/libc.so.6
    
    Under the APAR condition, other server processes or client
    sessions might hang and timeouts might not processed properly.
    For example, SHOW RESQ could report something similar to:
    This is a local waiter.
    status=resWaiting waitTime=3035 minutes          <= wait time
    significantly exceeds
    waiter Type=unknown (0) timeout value=60 minutes <= timeout
    value
    txnSeqNo=0:1438 resourceName=(11.2) lengthLen=4
    type=19002 and nameSpace=0
    waiter thead id is 250 condition=671231080
     mutex=28193944 abortFunc=ec6690
    It is expected that with the fix for
    IT13046: SERVER CAN DEADLOCK IN ADMSERVERMONITORTHREAD
    applied the symptom is seen less frequently.
      Tivoli Storage Manager Versions Affected: all supported
      Initial Impact: Medium
      Additional Keywords: TSM IBM Spectrum Protect
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users.                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in levels 7.1.5.100 and 7.1.6 . Note   *
    * that this is subject to change at the discretion of IBM.     *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed.
    Affected platforms:  AIX, HP-UX, Solaris, Linux, and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT14101

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-03-03

  • Closed date

    2016-03-15

  • Last modified date

    2016-03-15

  • 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

    TSM SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R71A PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP

  • R71W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT14101

Modified date: 15 March 2016