Uwe : > Maybe another Java7 bug? Are you using Java 7? > Nop, java 1.6
Shai > return getParentArray().getArray()[ordinal]; > Can you give me a lucene jar with print outs for when it throws this NPE? ...How is using ThreadedIndexWriter related > When I remove the Threaded version, it doesn't give me any problems. Otherwise, when i first deploy the jar, (and maybe because it gets a bit overwhelmed with accumulated data(from a distributed queue-Kestrel) it throws that nasty error for every Indexing thread, in my case for all 6 of. After that if i restart the server, no more exception. I tried to reproduce the error, with only the Readers and writers and with some bogus data, but it didn't throw anything.
