I saw these problems on my server, too. Changing the JVM, playing with garbage collection optins didn't help at all.
In the game we recognized that mob's didn't dissapear when they used to. E.g. a pigman left hell with us players and was blocked by a door to return to hell. We took a ride on our horses and were more than 1000 blocks away when we returned. The pigman should have despawned when we returned - but he was still present.
Switching the game to peaceful and back to normal removed the symptoms.
I saw these problems on my server, too. Changing the JVM, playing with garbage collection optins didn't help at all.
In the game we recognized that mob's didn't dissapear when they used to. E.g. a pigman left hell with us players and was blocked by a door to return to hell. We took a ride on our horses and were more than 1000 blocks away when we returned. The pigman should have despawned when we returned - but he was still present.
Switching the game to peaceful and back to normal removed the symptoms.
Root cause or other bug?
Has anyone else observed this behavior?