"fdx size mismatch" exception in StoredFieldsWriter.closeDocStore() when
closing index with 500M documents
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Key: LUCENE-1521
URL: https://issues.apache.org/jira/browse/LUCENE-1521
Project: Lucene - Java
Issue Type: Bug
Components: Index
Affects Versions: 2.4
Reporter: Shon Vella
Priority: Critical
When closing index that contains 500,000,000 randomly generated documents, an
exception is thrown:
java.lang.RuntimeException: after flush: fdx size mismatch: 500000000 docs vs
4000000004 length in bytes of _0.fdx
at
org.apache.lucene.index.StoredFieldsWriter.closeDocStore(StoredFieldsWriter.java:94)
at
org.apache.lucene.index.DocFieldConsumers.closeDocStore(DocFieldConsumers.java:83)
at
org.apache.lucene.index.DocFieldProcessor.closeDocStore(DocFieldProcessor.java:47)
at
org.apache.lucene.index.DocumentsWriter.closeDocStore(DocumentsWriter.java:367)
at
org.apache.lucene.index.IndexWriter.flushDocStores(IndexWriter.java:1688)
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3518)
at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3442)
at
org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1623)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1588)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1562)
...
This appears to be a bug at StoredFieldsWriter.java:93:
if (4+state.numDocsInStore*8 !=
state.directory.fileLength(state.docStoreSegmentName + "." +
IndexFileNames.FIELDS_INDEX_EXTENSION))
where the multiplication by 8 is causing integer overflow. The fix would be to
cast state.numDocsInStore to long before multiplying.
It appears that this is another instance of the mistake that caused bug
LUCENE-1519. I did a cursory seach for \*8 against the code to see if there
might be yet more instances of the same mistake, but found none.
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