Hi Dev From time to time, I'm running into this exception which causes the node to hang. Exception in thread "persistence-thread--p5-t1" org.infinispan.persistence.spi.PersistenceException: java.lang.NullPointerException at org.infinispan.persistence.file.SingleFileStore$2.run(SingleFileStore.java:672) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.infinispan.persistence.file.SingleFileStore.free(SingleFileStore.java:306) at org.infinispan.persistence.file.SingleFileStore.access$1200(SingleFileStore.java:63) at org.infinispan.persistence.file.SingleFileStore$2.run(SingleFileStore.java:670) ... 3 more My scenario: Start 3 distributed nodes, owners="2", filestore with preload="true" shared="true" purge="false". About 20 Mio entries in the .dat file. The state-transfer takes about 5 Minutes, the cluster is ready afterwards, but still very busy operating on the filestore! If I stop a node now, the exception happens. If I wait for about 30 Minutes (after the cpu load reduces), and the shutdown of a node works without problems. It persists its entries. Shall I create a JIRA or am I missing something? This email and any attachment may contain confidential information which is intended for use only by the addressee(s) named above. If you received this email by mistake, please notify the sender immediately, and delete the email from your system. You are prohibited from copying, disseminating or otherwise using the email or any attachment. _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev