APAR status
Closed as program error.
Error description
On Purescale systems with a large number of file systems or cluster nodes, the output of underlying Spectrum Scale command mmshutdown can output more than default system pipe buffer capacity. This causes the mmshutdown command to block and causing the db2cluster command to hang. When encountering this error, you may see a procstack and proctree on the db2cluster command similar to the following: procstack: waitpid(??, ??, ??) + 0x200 GPFSCommandAdaptor::executeCommand(const char*,const char*,const unsigned int)(0x8, 0x11006a1b0, 0xffffffffffc3040, 0x0) + 0xc4c GPFSCommandAdaptor::executeCommandV2(const char*,const char*,const unsigned int)(??, ??, ??, ??) + 0x5c GPFSCluster::stop(int,char(*)[255])(??, ??, ??) + 0x258 db2haCFSEnterMaintenanceMode(0x18a8800018a88, 0x110031da0) + 0x54c sqlhaCFSCallFunctionDirect(0x1a0000001a, 0x110171050) + 0x438 sqlhaCFSCallFunction(??, ??, ??) + 0xc00 sqlhaCFSEnterMaintenanceMode(??, ??) + 0x3c sqlhaUIEnterMaintenanceModeForCFSAll(sqlhaUICB*)(??) + 0xcac main(??, ??) + 0x4820 __start() + 0x70 proctree: 3932170 /usr/sbin/srcmstr 7077918 /usr/sbin/sshd 22937706 sshd: db2inst [priv] 2496318 sshd: db2inst@pts/2 24772836 -ksh 22741122 -ksh 24117288 ./db2cluster -cfs -enter -maintenance -all 21692660 /usr/lpp/mmfs/bin/mmksh /usr/lpp/mmfs/bin/mmshutdown -a 25296900 /usr/lpp/mmfs/bin/mmksh /usr/lpp/mmfs/bin/mmcommon onall /var/mmfs/tmp/nodefile 20185254 /usr/bin/perl /usr/lpp/mmfs/bin/mmdsh -vF /var/mmfs/tmp/cmdTmpDir.mmcommon.2529 22544406 <defunct> The output of mmshutdown command will also exceed 32k.
Local fix
Redirect STDOUT and STDERR of mmshutdown command.
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher * ****************************************************************
Problem conclusion
First fixed in Db2 11.1 Mod 4 Fixpack 5
Temporary fix
Comments
APAR Information
APAR number
IT27298
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-12-12
Closed date
2020-01-16
Last modified date
2020-01-16
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
DB2 FOR LUW
Fixed component ID
DB2FORLUW
Applicable component levels
RB10 PSN
UP
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Document Information
Modified date:
16 January 2020