On May 30, 2008, at 3:05 AM, Michael McCandless wrote:
Are you indexing only one document each time you open IndexWriter? Or do you open a single IndexWriter, add all documents for that directory, then close it?
The latter.
When the exception occurs, do you know how many simultaneous threads are doing searching? I realize you said it's extremely light load, but if it's possibly a good number of threads, and combined with a large mergeFactor, that would explain the exhaustion.
I don't know, but the answer is probably either 0 or 1. I forgot if I mentioned this before, but there is exactly 1 client for my server. Most of the time, the number of queries is 0 because the client is quiescent. A query only happens when the user (using the client) manually initiates a query. (I don't work on the client code, so I'm not totally sure, but the client may also initiate several queries at once when getting information for all the files in a directory. But even then, we're talking only about a handful of threads.)
The exception always happens when I call close() after unindexing the contents of a directory.
Do you know what your descriptor limit actually is? You can use this simple JUnit test (from the upcoming Lucene in Action revision) to check:
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