@Sanne: looks like a known issue: https://community.jboss.org/thread/197903?tstart=0

I'm using SNAPSHOT of Ispan 5.2 (up master) and HS 4.2. (my tmp-jgroups-mux branch).
With Lucene 3.5.

Any idea?

---

Although I see a bunch of errors --- Sanne?

23:27:20,577 ERROR [org.hibernate.search.exception.impl.LogErrorHandler] (Hibernate Search: Index updates queue processor for index default_test__com.google.appengine.api.datastore.Entity-1) HSEARCH000058: Exception occurred java.io.IOException: Read past EOF
Primary Failure:
Entity com.google.appengine.api.datastore.Entity  Id T:com.google.appengine.api.datastore.Key:agR0ZXN0cikLEiJfX29yZy5qYm9zcy5jYXBlZHdhcmYuTG9nUmVxdWVzdF9fGJACDA  Work Type  org.hibernate.search.backend.UpdateLuceneWork
: java.io.IOException: Read past EOF
at org.infinispan.lucene.SingleChunkIndexInput.readByte(SingleChunkIndexInput.java:77)
at org.apache.lucene.store.ChecksumIndexInput.readByte(ChecksumIndexInput.java:41)
at org.apache.lucene.store.DataInput.readInt(DataInput.java:84)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:272)
at org.apache.lucene.index.IndexFileDeleter.<init>(IndexFileDeleter.java:182)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1178)
at org.hibernate.search.backend.impl.lucene.IndexWriterHolder.createNewIndexWriter(IndexWriterHolder.java:127)
at org.hibernate.search.backend.impl.lucene.IndexWriterHolder.getIndexWriter(IndexWriterHolder.java:102)
at org.hibernate.search.backend.impl.lucene.AbstractWorkspaceImpl.getIndexWriter(AbstractWorkspaceImpl.java:119)
at org.hibernate.search.backend.impl.lucene.LuceneBackendQueueTask.applyUpdates(LuceneBackendQueueTask.java:99)
at org.hibernate.search.backend.impl.lucene.LuceneBackendQueueTask.run(LuceneBackendQueueTask.java:67)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) [classes.jar:1.6.0_31]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [classes.jar:1.6.0_31]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [classes.jar:1.6.0_31]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [classes.jar:1.6.0_31]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [classes.jar:1.6.0_31]
at java.lang.Thread.run(Thread.java:680) [classes.jar:1.6.0_31]