WA Agent on Linux crashes with a core dump
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WA Agent on Linux crashes with a core dump

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Article ID: 407491

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Updated On:

Products

ESP dSeries Workload Automation - Business Agents (dSeries)

Issue/Introduction

Following patching, the ESP / WA Agent 12.1 would not start, and creates core dump.  The nohup.err has error like this

 

Unhandled exception
Type=Segmentation error vmState=0x00070000
J9Generic_Signal_Number=00000018 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000001
Handler1=00007FF5E1514E00 Handler2=00007FF5E0E069F0 InaccessibleAddress=0000000099669B00
RDI=00007FF5C763BFC3 RSI=00007FF5C763BFC8 RAX=0000000000000098 RBX=00000000FFF4B098
RCX=0000000099669900 RDX=00007FF5C763BFC8 R8=00000000FFF7DAD8 R9=0000000000000000
R10=000000004689A022 R11=0000000047AC082F R12=0000000048650DC0 R13=0000000046B73E38
R14=0000000048650DC0 R15=00007FF5E155C00D
RIP=00007FF5DB5558BA GS=0000 FS=0000 RSP=00000000020F0520
EFlags=0000000000010213 CS=0033 RBP=0000000002022E00 ERR=0000000000000004
TRAPNO=000000000000000E OLDMASK=0000000000000000 CR2=0000000099669B00
xmm0 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm1 00000000fff7dac8 (f: 4294433536.000000, d: 2.121732e-314)
xmm2 00007ff5e2a95980 (f: 3802749440.000000, d: 6.951209e-310)
xmm3 ffffffffffffffff (f: 4294967296.000000, d: -nan)
xmm4 000000000000009f (f: 159.000000, d: 7.855644e-322)
xmm5 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm6 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm7 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm8 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm9 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm10 5b011b1012143158 (f: 303313248.000000, d: 2.371425e+130)
xmm11 0000000049d70a38 (f: 1238829568.000000, d: 6.120632e-315)
xmm12 000000004689a022 (f: 1183424512.000000, d: 5.846894e-315)
xmm13 0000000047ac082f (f: 1202456576.000000, d: 5.940925e-315)
xmm14 0000000048650dc0 (f: 1214582272.000000, d: 6.000833e-315)
xmm15 0000000046b73e38 (f: 1186414080.000000, d: 5.861665e-315)
Module=/opt/CA/WA_Agent/jre/lib/amd64/compressedrefs/libj9jit29.so
Module_base_address=00007FF5DB23F000
Target=2_90_20200416_608 (Linux 4.18.0-553.54.1.el8_10.x86_64)
CPU=amd64 (2 logical CPUs) (0xe51b1000 RAM)

Environment

Workload Automation Agent: 12.0 / 12.1

Cause

The error is related to a possible memory defect in Eclipse J9 JRE. 

 

 

Resolution

 Add the following line in the agentparm.txt

oscomponent.jvm.x.options=-XX:+UseGetTimeOfDay;-Xms128m;Xmx512m;-Xnoaot

If the "oscomponent.jvm.x.options" already exists in agentparm.txt, then add ';-Xnoaot' to the end.  Restart the agent and test again to see if there are any issues. 

It is recommended to upgrade the JRE and WA Agent as well.  WA Agent 12.0 and 12.1 use any latest build JRE 8.  For agent versions 12.1SP1 and above, users can use JRE 11 and 17, which may mitigate the issue as well.

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