DUAS5: SAP Manager crash or "unable to create new thread"

Products

• CA Automic Dollar Universe

Issue/Introduction

The manager for SAP crashes or fails to Submit some jobs with the following errors in sapjcs.log:
##########################
2018-27-05 11:00:22 # agt_create_func_thread # Error: unable to create new thread
2018-27-05 11:00:22 # agt_srv_thread_main # No more thread available: request ignored (error 11)
##########################

Product Version: Dollar.Universe 5.6.0 FX25010 + Manager for SAP 4.4.1
Patch level detected: FX25010 (DUAS) +  FX24937A (SAP)

 

Cause

Cause type: Configuration
Root Cause: Issue due to the memory limitation in AIX for a process, by default being 256MB.

Environment

OS: IBM AIX

Resolution

Workaround: stop / start the manager for SAP.
Solution:  increase the LDR_CNTRL limit for the process uxagtsap

1 - Stop the SAP Manager (in case of is still running),
2 - Using the 'ulimit' command, set the value to 'unlimited' for the 'data' : ulimit -d unlimited
Double check that this change has been taken in account with the command : ulimit -a
The concerned user is the owner of the SAP manager process.
3 - Edit the file 'uxstartjcs.ksh' and add the following environment variable to increase the default limit to 2GB, for example:
export LDR_CNTRL=MAXDATA=0x80000000
nohup $UXEXE/uxagtsap ${AREA} ${UCOMPANY} ${UNODE} > $UXSAP/log/univmgr_${UCOMPANY}_${UNODE}_${AREA}.log 2>&1 &
unset LDR_CNTRL

Remarks :
the value 0x40000000 corresponds to a data segment of 1GB
the value 0x80000000 corresponds to a data segment of 2GB


4 - Restart the SAP Manager in using the command 'uxstartjcs.ksh'.