AS400 - Production Autosys agent not starting after agent upgrade from 11.4 to 11.5

Products

• CA Workload Automation AE - System Agent (AutoSys)

Issue/Introduction

AS400 - Production Autosys agent not starting after agent upgrade. Agent services starting after upgrade however its stopped on its own quickly. 

Environment

Release : 11.4

Component :

Cause

We could see the following error in nohup.stderr

Unhandled exception
Type=Illegal instruction vmState=0x000535ff
J9Generic_Signal_Number=00000010 Signal_Number=00000004 Error_Value=00000000 Signal_Code=0000001e
Handler1=F05DB398 Handler2=F05D45A8

JVMDUMP039I Processing dump event "gpf", detail "" at 2021/11/06 11:59:38 - please wait.
JVMDUMP032I JVM requested System dump using '/home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/core.20211106.115938.35009.0001.dmp' in response to an event
JVMDUMP010I System dump written to /home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/core.20211106.115938.35009.0001.dmp
JVMDUMP032I JVM requested Java dump using '/home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/javacore.20211106.115938.35009.0002.txt' in response to an event
JVMDUMP010I Java dump written to /home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/javacore.20211106.115938.35009.0002.txt
JVMDUMP032I JVM requested Snap dump using '/home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/Snap.20211106.115938.35009.0003.trc' in response to an event
JVMDUMP010I Snap dump written to /home/AUTOSYS/CA/CA_WA_Agent_R11_3_4/Snap.20211106.115938.35009.0003.trc
JVMDUMP013I Processed dump event "gpf", detail "".

Resolution

The agent was using Java 1.6 

OS patch was applied to upgrade java to 1.8 and the issue was fixed