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2822478 - Crash of NW application server (running on Unix-like platform) due to cleanipc

Symptom

Important: This article intends to provides RCA for a crash event that fits the criteria explained below. It does not aim to resolve an ongoing startup problem.

SAP NetWeaver application server running at a Unix-like operating system becomes unstable and crashes. The following information can be found at the traces of the kernel processes:

  • Work process trace (dev_w*):

    *** ERROR => e=43 semop(1114127,(0,0,0),(0,1,0),2) (43: Identifier removed) [evtux.c      1121]

  • Dispatcher trace (dev_disp):

    *** ERROR => e=22 semop(851975,(0,-1,6144),1) (22: Invalid argument) [semux.c 577]
    *** ERROR => DpITmSlotAllocate: SemRq [dpxxtool2.c 4391]
    *** ERROR => e=22 semop(851975,(0,-1,6144),1) (22: Invalid argument) [semux.c 577]
    *** DP_FATAL_ERROR => DpTmDisconnect: SemRq
    *** DISPATCHER EMERGENCY SHUTDOWN ***

  • ICM trace (dev_icm):

    *** ERROR => e=43 semop(2293811,(16,0,0),(16,1,0),2) (43: Identifier removed) [evtux_mt.c 1121]
    *** ERROR => EvtWtRst(16997) failed: 1 [mpixx_mt.c 6199]
    *** ERROR => IcmMpiWatchDogThread: MpiSelSelect failed(rc=3): cleanipc was called for this instance [icxxthr_mt.c 1512]
    *** IcmMpiWatchDogThread: exit thread ***
    (...)
    *** ERROR => e=22 semop(1081358,(0,-1,6144),1) (22: Invalid argument) [semux_r_mt.c 577]
    *** ERROR => DpRqIPutIntoQ: SemRq (rc=1) [dpxxqueu_mt. 590]

Please note that ICM already provides the cause by explicitly writing: "cleanipc was called for this instance"


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Environment

  • SAP NetWeaver
  • Unix-like Operating systems

Product

SAP NetWeaver all versions

Keywords

KBA , BC-CST-DP , Dispatcher, Task Handler , BC-OP-LNX , Linux , BC-OP-AIX , IBM AIX , BC-OP-SUN , SUN Solaris , BC-OP-HPX , HP-UX , Problem

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