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2244689 - Coordinator recovery takes a long time or appears to hang - SAP IQ

Symptom

  • Following a shutdown or abort of SAP IQ 16, the multiplex coordinator node's restart and recovery process is taking a long time and gives the appearance of being hung.

  • Looking at the IQMSG file and SRV log file, the first sequence of "opendatabase" messages shows that the recovery process has successfully completed:

    iqmsg_1st_db_open.png

   iqmsg_1st_db_open2.png

  • But, the second sequence of "opendatabase" messages gives the appearance that the IQ Server is stuck or hung:

    iqmsg_2nd_db_open.png

  • However, when using an operating system tool to check CPU consumption, it shows that the IQ Server process continues to consume CPU cycles.

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Environment

SAP IQ 16

Product

SAP IQ 16.0

Keywords

mpx, cn, co-ordinator, IQ16, IQ 16, OS, linux, windows, aix, solaris, unix, crash, failure, hang, hung, abort, sybase, "taking a long time", "taking long", recovery, slow, suspended, "dead lock" , KBA , BC-SYB-IQ , Sybase IQ , How To

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