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Steven Bethard commented on LUCENE-2420: ---------------------------------------- I finally found the documentation saying that the maximum number of documents is ~274 billion: http://lucene.apache.org/java/3_0_1/fileformats.html Google queries that failed to find this: lucene index maximum documents lucene document limit lucene max docs Maybe a bullet could be added to the FAQ (which does turn up for most of these queries)? http://wiki.apache.org/lucene-java/LuceneFAQ As far as the exception goes, regardless of the transaction semantics, I really don't think the code works correctly after numeric overflow. Once SegmentWriteState.numDocsInStore is negative, I would expect code like StoredFieldsWriter.flush to fail: synchronized public void flush(SegmentWriteState state) throws IOException { if (state.numDocsInStore > 0) { ... Perhaps I'm wrong, but it seems like this is going to do the wrong thing when SegmentWriteState.numDocsInStore is negative. If I'm not wrong, then it seems sensible to me to raise an exception on numeric overflow. > "fdx size mismatch" overflow causes RuntimeException > ---------------------------------------------------- > > Key: LUCENE-2420 > URL: https://issues.apache.org/jira/browse/LUCENE-2420 > Project: Lucene - Java > Issue Type: Bug > Components: Index > Affects Versions: 3.0.1 > Environment: CentOS 5.4 > Reporter: Steven Bethard > > I just saw the following error: > java.lang.RuntimeException: after flush: fdx size mismatch: -512764976 docs > vs 30257618564 length in bytes of _0.fdx file exists?=true > at > org.apache.lucene.index.StoredFieldsWriter.closeDocStore(StoredFieldsWriter.java:97) > at > org.apache.lucene.index.DocFieldProcessor.closeDocStore(DocFieldProcessor.java:51) > at > org.apache.lucene.index.DocumentsWriter.closeDocStore(DocumentsWriter.java:371) > at > org.apache.lucene.index.IndexWriter.flushDocStores(IndexWriter.java:1724) > at > org.apache.lucene.index.IndexWriter.doFlushInternal(IndexWriter.java:3565) > at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3491) > at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3482) > at > org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1658) > at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1621) > at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1585) > Note the negative SegmentWriteState.numDocsInStore. I assume this is because > Lucene has a limit of 2 ^ 31 - 1 = 2147483647 (sizeof(int)) documents per > index, though I couldn't find this documented clearly anywhere. It would have > been nice to get this error earlier, back when I exceeded the limit, rather > than now, after a bunch of indexing that was apparently doomed to fail. > Hence, two suggestions: > * State clearly somewhere that the maximum number of documents in a Lucene > index is sizeof(int). > * Throw an exception when an IndexWriter first exceeds this number rather > than only on close. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org