[ https://issues.jboss.org/browse/ISPN-2831?page=com.atlassian.jira.plugin.... ] Christopher Wong commented on ISPN-2831: ---------------------------------------- I've seen this happen with Hibernate Search and Infinispan 5.2.4.Final: Caused by: java.lang.NullPointerException at org.infinispan.lucene.readlocks.DistributedSegmentReadLocker.realFileDelete(DistributedSegmentReadLocker.java:184) at org.infinispan.lucene.readlocks.DistributedSegmentReadLocker.deleteOrReleaseReadLock(DistributedSegmentReadLocker.java:109) at org.infinispan.lucene.InfinispanDirectory.deleteFile(InfinispanDirectory.java:213) at org.apache.lucene.index.IndexFileDeleter.deleteFile(IndexFileDeleter.java:578) at org.apache.lucene.index.IndexFileDeleter.<init>(IndexFileDeleter.java:256) at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1178) at org.hibernate.search.store.impl.DirectoryProviderHelper.initializeIndexIfNeeded(DirectoryProviderHelper.java:159) at org.hibernate.search.infinispan.impl.InfinispanDirectoryProvider.start(InfinispanDirectoryProvider.java:89) at org.hibernate.search.indexes.impl.DirectoryBasedIndexManager.initialize(DirectoryBasedIndexManager.java:93) at org.hibernate.search.indexes.impl.IndexManagerHolder.createDirectoryManager(IndexManagerHolder.java:241) ... 60 more -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira