Instances Not GCed when Cache is removed from Cache Manager

[tktong]

This is on Infinispan 7.2.4.Final.

After I stopped an existing local cache and removed it from the cache manager, I noticed that the cache and all other objects associated with the cache are not being garbage collected.

cache.stop();
cacheManager.removeCache(cache.getName());

If you look at the image below, you'll notice that the CacheManager is holding onto a listener (NumericVersionGenerator$RankCalculator) which in turn is holding onto the cache. Because of this reference, none of the cache related entities become eligible to be garbage collected. We continue to create a new cache per user session so our memory consumption grows until we simply run out. It is a little odd for the cache manager to be holding onto a listener for a cache that the manager no longer holds.

Am I missing something in regards to properly stopping and removing a cache from the manager?

[nadirx]

Hi Timothy,

you are right. I've created [ISPN-6044] NumericVersionGenerator stops removed caches from being GCed - JBoss Issue Tracker

[tktong]

As a side note:

It is possible to free the cache reference by retrieving the NumericVersionGenerator from the component registry.

NumericVersionGenerator versionGenerator = (NumericVersionGenerator) cache.getComponentRegistry.getComponent("org.infinispan.transaction.versionGenerator");
versionGenerator.init(null);

However, the listener (NumericVersionGenerator$RankCalculator) would still be sitting in the CacheManagerNotifierImpl. The cache would be freed, but the RankCalculator would not be eligible to be garbage collected.