Swarnendu Biswas created LUCENE-5732:
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Summary: Possible order violation in lucene library version 2.4.1
Key: LUCENE-5732
URL: https://issues.apache.org/jira/browse/LUCENE-5732
Project: Lucene - Core
Issue Type: Bug
Components: core/store
Affects Versions: 2.4.1
Environment: RHEL 6.5, 64 bit, Intel i5
Reporter: Swarnendu Biswas
Hi,
I am working on a research project on data race detection, and am using the
DaCapo benchmarks for evaluation. I am using the benchmark lusearch from the
2009 suite, which uses lucene library 2.4.1.
For one test case, I am monitoring a pair of accesses
say, Lorg/apache/lucene/store/Directory;.<init> ()V:40(6) and
Lorg/apache/lucene/store/FSDirectory;.close ()V:524(1). The format is <class
name>.<method name> <method desc>:line(byte code index).
During my work, I am getting AlreadyClosedExceptions on the FSDirectory from
the ensureOpen() method for some threads, which I think is probably due to an
order violation. I have actually introduced delays
in my instrumentation which delays threads that execute the code in
Lorg/apache/lucene/store/FSDirectory;.close ()V. This is causing the other
query threads to throw an exception.
Here is the exception trace:
org.apache.lucene.store.AlreadyClosedException: this Directory is closed
at org.apache.lucene.store.Directory.ensureOpen(Directory.java:220)
at org.apache.lucene.store.FSDirectory.list(FSDirectory.java:320)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:533)
at
org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:115)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:206)
at org.dacapo.lusearch.Search$QueryProcessor.<init>(Search.java:207)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
org.apache.lucene.store.AlreadyClosedException: this Directory is closed
at org.apache.lucene.store.Directory.ensureOpen(Directory.java:220)
at org.apache.lucene.store.FSDirectory.list(FSDirectory.java:320)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:533)
at
org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:115)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:206)
at org.dacapo.lusearch.Search$QueryProcessor.<init>(Search.java:207)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
java.lang.NullPointerException
at org.dacapo.lusearch.Search$QueryProcessor.run(Search.java:226)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
java.lang.NullPointerException
at org.dacapo.lusearch.Search$QueryProcessor.run(Search.java:226)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
org.apache.lucene.store.AlreadyClosedException: this Directory is closed
at org.apache.lucene.store.Directory.ensureOpen(Directory.java:220)
at org.apache.lucene.store.FSDirectory.list(FSDirectory.java:320)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:533)
at
org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:115)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:206)
at org.dacapo.lusearch.Search$QueryProcessor.<init>(Search.java:207)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
java.lang.NullPointerException
at org.dacapo.lusearch.Search$QueryProcessor.run(Search.java:226)
at org.dacapo.lusearch.Search$QueryThread.run(Search.java:179)
This exception does not happen during normal instrumentation, but can easily be
reproduced by introducing just delays in the instrumentation.
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