JON Server with high CPU usage continuously performing JVM Garbage Collection and eventually failing with OutOfMemoryError: Java heap space
Issue
- Excessive GC time
- Server is experiencing out of memory issues and finally down
- Issue with excessive Garbage Collection (GC) times on our servers
- Each server is spending 15 to over 40 seconds per minute doing GC
- GC and CPU usage went up and have both stayed high for a few days
- CPU is now averaging 40% for server over several hours
Environment
- JBoss Operations Network (JON) 2.4.0, 2.4.1
- Multiple alert conditions occurring every minute (with or without dampening rules)
- Depending on number of alerts being evaluated per minute, issue seems to occur within a week to a few months of continued operation
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