com/ibm/xml/xlxp2/api/wssec/WSSXMLStreamReader cause out of memory issue

Question

Good day,

2 years ago, my application hit OOME issue, I analyze the heap dump and found that its cause by com/ibm/xml/xlxp2/api/wssec/WSSXMLStreamReader, I tried to google around and found this IBM article: https://www.ibm.com/support/pages/apar/PM42465

Base on what I understand from this article, I need to add in a system property which is call com.ibm.xml.xlxp2.api.util.Pool.STRONG_REFERENCE_POOL_MAXIMUM_SIZE and set its value to 0.

Thus, I set this in Application Servers > myApp > Process Definition > Java Virtual Machine > Custom Properties:

I restart the server and so far didnt see this OOME issue happen again for 2 years. (In fact I am not sure this solution is work or not as I also want to keep in view)

Last week, there is a OOME issue reported again, and I check the heapdump, found that its same issue again.

Looks like add the system property is not work.

May I know who to fix this OOME issue? Is the step I did is correct? My WAS version is 8.5.5.

Kindly advise, appreciate your help.