Possible deadlock for clustered caches with Expiration enabled -------------------------------------------------------------- Key: ISPN-9982 URL: https://issues.jboss.org/browse/ISPN-9982 Project: Infinispan Issue Type: Bug Reporter: Diego Lovison Assignee: Diego Lovison Priority: Minor Fix For: 10.0.0.Beta3 Add a test case for the following scenario: If a cache is configured for expiration an the intervall is != -1 there is a possiblity for a deadlock with JGroups and Infinispan threads because the reaper and any access to the same entry can cause a deadlock. The possibility is higher if the configured interval for the reaper is shorter. A thread dump might show something like followed: "HotRod-hotrod-internalServerWorker-4-12" #279 prio=5 os_prio=0 tid=0x00007f35980b8800 nid=0xbbb waiting for monitor entry [0x00007f356cfb4000] java.lang.Thread.State: BLOCKED (on object monitor) at org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8.compute(EquivalentConcurrentHashMapV8.java:1910) - waiting to lock <0x0000000742cca028> (a org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8$Node) at org.infinispan.container.DefaultDataContainer.compute(DefaultDataContainer.java:335) at org.infinispan.expiration.impl.ExpirationManagerImpl.handleInMemoryExpiration(ExpirationManagerImpl.java:135) at org.infinispan.expiration.impl.ClusterExpirationManager.handleInMemoryExpiration(ClusterExpirationManager.java:152) - locked <0x0000000742cc9898> (a org.infinispan.container.entries.metadata.MetadataTransientCacheEntry) at org.infinispan.container.DefaultDataContainer.get(DefaultDataContainer.java:201) "pool-7-thread-1" #158 prio=5 os_prio=0 tid=0x00007f35c816c000 nid=0xb35 waiting for monitor entry [0x00007f3575238000] java.lang.Thread.State: BLOCKED (on object monitor) at org.infinispan.expiration.impl.ExpirationManagerImpl.lambda$handleInMemoryExpiration$0(ExpirationManagerImpl.java:137) - waiting to lock <0x0000000742cc9898> (a org.infinispan.container.entries.metadata.MetadataTransientCacheEntry) at org.infinispan.expiration.impl.ExpirationManagerImpl$$Lambda$374/1904915245.compute(Unknown Source) at org.infinispan.container.DefaultDataContainer.lambda$compute$3(DefaultDataContainer.java:336) at org.infinispan.container.DefaultDataContainer$$Lambda$375/1917382785.apply(Unknown Source) at org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8.compute(EquivalentConcurrentHashMapV8.java:1919) - locked <0x0000000742cca028> (a org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8$Node) at org.infinispan.container.DefaultDataContainer.compute(DefaultDataContainer.java:335) at org.infinispan.expiration.impl.ExpirationManagerImpl.handleInMemoryExpiration(ExpirationManagerImpl.java:135) at org.infinispan.expiration.impl.ClusterExpirationManager.processExpiration(ClusterExpirationManager.java:82)