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From "Michael McCandless" <luc...@mikemccandless.com>
Subject Re: NPE in RAMDirectory after upgrade to 2.1
Date Mon, 26 Feb 2007 16:35:59 GMT

"jm" <jmuguruza@gmail.com> wrote:

> I have two processes running in parallel, each one adding and deleting
> to its own set of indexes. Since I upgraded to 2.1 I am getting a NPE
> at RAMDirectory.java line 207 in one of the processes.
> 
> Line 207 is:
>       RAMFile existing = (RAMFile)fileMap.get(name);
> the stack trace is:
> java.lang.NullPointerException
> org.apache.lucene.store.RAMDirectory.createOutput(RAMDirectory.java:207)
> org.apache.lucene.index.FieldInfos.write(FieldInfos.java:256)
> org.apache.lucene.index.DocumentWriter.addDocument(DocumentWriter.java:75)
> org.apache.lucene.index.IndexWriter.buildSingleDocSegment(IndexWriter.java:706)
> org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:694)
> org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:680)

Hmm.  One thing that changed in 2.1 is when a RAMDirectory is closed
it now sets fileMap to null (which it did not pre-2.1).

Is it possible you are accidentally closing a writer but then calling
its addDocument method?

Mike

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