High CPU usage and OOM error after upgrade to 15100
In some customer environments after upgrading to 15100, High CPU utilization and Out of Memory errors due to insufficient Heap space were seen.
1. High CPU utilization error (SD-132540 released in 15110 build)
In 15100 build version, we have introduced Zia Parser feature which is enabled by default in IT helpdesk portal and disabled in other available portals. For this feature, data training will occur during service startup for all portals (even when Zia parser is disabled). This is to try out "Test Zia Parser" option inside the Zia parser feature. However, in some big environments, training in available portals triggered High CPU usage.
This has been fixed in 15110 build - Training during service startup will occur only for Zia parser feature enabled portals. This training will occur only once and the trained data will be stored in a file. Post this, during every service startup, training will not occur due to this stored data file.
2. Out of Memory error due to insufficient Heap space (SD-133334)
In some customer environments, while initializing the Zia parser feature using the training data, we encountered OOM errors. We are actively analyzing this issue. If any customer reaches out with this error, kindly collect us the files present under "/ZIA/dataset/parser/" directory
For customers in 15100 build, please use the attached fjar file for SD-132540 fix. Even then if customer faces OOM error, execute the below update query (to disable zia parser feature in all portals) and restart the service once.
update ai_module set action_enabled=false where actionname='parser';
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