AffinityIndexManager fails to index documents in async mode

19:06:04,638 ERROR (Hibernate Search: Index updates queue processor for index entity.5-1) [LogErrorHandler] HSEARCH000058: Exception occurred 
org.apache.lucene.store.LockObtainFailedException: lock instance already assigned

18:53:59,553 ERROR (Hibernate Search: Index updates queue processor for index entity.2-1) [LuceneBackendQueueTask] HSEARCH000073: Error in 
backend
org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed
        at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:720)
        at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:734)

18:55:31,328 ERROR (Hibernate Search: Commit Scheduler for index entity.143-1) [AffinityErrorHandler] HSEARCH000117: IOException 
on the IndexWriter
java.io.IOException: This lock is no longer being held
        at org.infinispan.lucene.impl.BaseLuceneLock.ensureValid(BaseLuceneLock.java:89)
        at org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(LockValidatingDirectoryWrapper.java:43)
        at org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(TrackingDirectoryWrapper.java:43)
        at org.apache.lucene.codecs.lucene50.Lucene50PostingsWriter.<init>(Lucene50PostingsWriter.java:105)