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Tim Smith commented on LUCENE-5492: ----------------------------------- Narrowing it down definitely seeing a reference count issue this only seems to occur when using DirectoryReader.open(IndexWriter ...) methods for one particular commit point "segments_4", i see the following refcount behavior: * incref segments_4 ** incref _0_upgraded.si refcount=3 ** decref _0_upgraded.si refcount=2 * incref segments_4 ** NOTE: _0_upgraded.si not incref'd this time * ... * delete segments_4 ** decref _0_upgraded.si ERROR > IndexFileDeleter AssertionError in presence of *_upgraded.si files > ------------------------------------------------------------------ > > Key: LUCENE-5492 > URL: https://issues.apache.org/jira/browse/LUCENE-5492 > Project: Lucene - Core > Issue Type: Bug > Affects Versions: 4.7 > Reporter: Tim Smith > > When calling IndexWriter.deleteUnusedFiles against an index that contains 3.x > segments, i am seeing the following exception: > {code} > java.lang.AssertionError: failAndDumpStackJunitStatment: RefCount is 0 > pre-decrement for file "_0_upgraded.si" > at > org.apache.lucene.index.IndexFileDeleter$RefCount.DecRef(IndexFileDeleter.java:630) > at > org.apache.lucene.index.IndexFileDeleter.decRef(IndexFileDeleter.java:514) > at > org.apache.lucene.index.IndexFileDeleter.deleteCommits(IndexFileDeleter.java:286) > at > org.apache.lucene.index.IndexFileDeleter.revisitPolicy(IndexFileDeleter.java:393) > at > org.apache.lucene.index.IndexWriter.deleteUnusedFiles(IndexWriter.java:4617) > {code} > I believe this is caused by IndexFileDeleter not being aware of the Lucene3x > Segment Infos Format (notably the _upgraded.si files created to "upgrade" an > old index) > This is new in 4.7 and did not occur in 4.6.1 > Still trying to track down a workaround/fix -- This message was sent by Atlassian JIRA (v6.2#6252) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org