How to generate application core dumps on AIX
Article ID: 100001464
Updated On:
Resolution
The steps below can be used to collect an application coredump on AIX. This is to be used in situations where process hangs need to be diagnosed, such as when vxconfigd is hanging, or the VCS had process is hanging.
1. Check if the "fullcore" flag is on:
# lsattr -E -lsys0 -a fullcorefullcore false Enable full CORE dump TrueIf not, set it to "true":
# chdev -l sys0-a fullcore=truesys0 changed2. Generate a coredump of the hung process:
# gencore E.g. core-dumping the vxconfigd process:
# ps -aef |grep -i vxconfigdroot 188538 1 0Feb 21 - 0:19 vxconfigd -x syslog -m boot# gencore 188538 /tmp/core# ls -ltotal 23800-rw-rw-rw- 1root system 12183573 Mar 22 08:50 core# file corecore: AIX corefile fulldump 32-bit, vxconfigd.5.33. Collect the core, associated binary and relevant libraries to help debug the core. In the example below, the core file location and associated binary are used as arguments:
# snapcore /tmp/core /sbin/vxconfigd.5.3Core file "core" created by "vxconfigd.5.3"pass1() in progress ....Calculating space required .Total space required is 38600 kbytes ..Checking for available space ...Available space is 1676064 kbytespass1 complete.pass2() in progress ....Collecting fileset information .Collecting error report of CORE_DUMP errors ..Creating readme file ..Creating archive file ...Compressing archive file ....pass2completed.Snapcore completed successfully. Archive created in /tmp/snapcore.# ls -ltotal 48400-rw-rw-rw- 1root system 12183573 Mar 22 08:50 core-rw-r--r-- 1root system 12594032 Mar 22 08:50 snapcore_663646.pax.Z# filesnapcore_663646.pax.Zsnapcore_663646.pax.Z:compressed data block compressed 16 bitThe resulting snapcore file can then be sent to Technical Support. It can then be uncompressed and untarred (tar can work on pax images).
Issue/Introduction
How to generate application core dumps on AIX
Was this article helpful?
Yes
No
Powered by
