Coherence Memory Leak of Infilter Objects When Extend Clients Connect and Disconnect
(Doc ID 2220269.1)
Last updated on SEPTEMBER 22, 2023
Applies to:
Oracle Coherence - Version 12.2.1.2.0 and laterInformation in this document applies to any platform.
Symptoms
On : 12.2.1.2.0 version, Oracle Coherence
Memory leak in storage nodes when registering listeners via Extend Proxy WrapperCacheService.
When a new Extend* connection is established, a corresponding listener and filter instances are created in the JVM of each storage node.
When the Extend* connection is terminated, the listener and filter instances *are not* dereferenced and so remain active in the JVM memory.
This eventually leads to a memory leak whereby the authorization listeners/filters consume a lot of the JVM memory and leaves not enough space for data storage.
1. After starting the Cache server and proxy server,
# Check live instances of 'com.tangosol.util.filter.Infilter'
jmap -histo:live <PID>| grep 'com.tangosol.util.filter.Infilter'
2. After the client connects, queries the data and disconnects,
# Check live instances of 'com.tangosol.util.filter.Infilter'
jmap -histo:live <PID>| grep 'com.tangosol.util.filter.Infilter'
1 24 com.tangosol.util.filter.InFilter
3. After the client connects again, queries the data and disconnects,
# Check live instances of 'com.tangosol.util.filter.Infilter'
jmap -histo:live <PID>| grep 'com.tangosol.util.filter.Infilter'
2 48 com.tangosol.util.filter.InFilter
We can see that the number of instances of com.tangosol.util.filter.InFilter as the clients connects and disconnects. This indicates a memory leak of com.tangosol.util.filter.InFilter
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |