Memory Leak
------------
Key: LUCENE-2192
URL: https://issues.apache.org/jira/browse/LUCENE-2192
Project: Lucene - Java
Issue Type: Bug
Components: Index
Affects Versions: 2.9
Reporter: Ramazan VARLIKLI
Hi All ,
I have been working on a problem with Lucene and now gave up after trying many
different possibilites which gives me a feeling that There is a bug on this .
The scenario is we have an CMS applicaton into which we add new content every
week , instead of updating the index which is a bit tricky, I prefer to delete
all index documents and add them again which is straightforward . The problem
is Lucene doesn't delete the old data somehow and increase the index size every
time during the update . I also profile it with java tools and see that even if
I close the IndexWriter class and sent it to Garbage Collector it holds all the
docs in the memory .
Here is the code I use
Directory directory = new SimpleFSDirectory(new File(path));
writer = new IndexWriter(directory, analyzer,
false,IndexWriter.MaxFieldLength.LIMITED);
writer.deleteAll();
//after adding docs close the indexwriter
writer.close();
The above code invoked every time we need to update the index . I tried many
different scenario here to overcome the problem which includes physically
removing the index directory( see how desperate I am ) , optimizing , flushing,
commiting indexwriter, create=true parameter and so on .
Here is the index file size during creation. If I shutdown the application and
restart it , index size starts with 2,458 which is correct size.
Any help will be appreciated
_17.cfs 2,458 KB
_18.cfs 3,990 KB
_19.cfs 5,149 KB
here is the Lucene logs during creationg of index files 3 times in a row
IFD [http-8080-1]: setInfoStream
deletionpolicy=org.apache.lucene.index.keeponlylastcommitdeletionpol...@6649
IW 0 [http-8080-1]: setInfoStream:
dir=org.apache.lucene.store.simplefsdirect...@c:\Documents and
Settings\rvarlikli\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Clipbank3.5\lucene
autoCommit=false
mergepolicy=org.apache.lucene.index.logbytesizemergepol...@3b626c
mergescheduler=org.apache.lucene.index.concurrentmergeschedu...@baa6ba
ramBufferSizeMB=16.0 maxBufferedDocs=-1 maxBuffereDeleteTerms=-1
maxFieldLength=10000 index=
IW 0 [http-8080-1]: now flush at close
IW 0 [http-8080-1]: flush: segment=_17 docStoreSegment=_17 docStoreOffset=0
flushDocs=true flushDeletes=true flushDocStores=true numDocs=2765
numBufDelTerms=0
IW 0 [http-8080-1]: index before flush
IW 0 [http-8080-1]: DW: flush postings as segment _17 numDocs=2765
IW 0 [http-8080-1]: DW: closeDocStore: 2 files to flush to segment _17
numDocs=2765
IW 0 [http-8080-1]: DW: oldRAMSize=7485440 newFlushedSize=2472818
docs/MB=1,172.473 new/old=33.035%
IFD [http-8080-1]: now checkpoint "segments_1j" [1 segments ; isCommit = false]
IFD [http-8080-1]: now checkpoint "segments_1j" [1 segments ; isCommit = false]
IFD [http-8080-1]: delete "_17.fdx"
IFD [http-8080-1]: delete "_17.tis"
IFD [http-8080-1]: delete "_17.frq"
IFD [http-8080-1]: delete "_17.nrm"
IFD [http-8080-1]: delete "_17.fdt"
IFD [http-8080-1]: delete "_17.fnm"
IFD [http-8080-1]: delete "_17.tii"
IFD [http-8080-1]: delete "_17.prx"
IFD [http-8080-1]: now checkpoint "segments_1j" [1 segments ; isCommit = false]
IW 0 [http-8080-1]: LMP: findMerges: 1 segments
IW 0 [http-8080-1]: LMP: level 6.2247195 to 6.400742: 1 segments
IW 0 [http-8080-1]: CMS: now merge
IW 0 [http-8080-1]: CMS: index: _17:c2765
IW 0 [http-8080-1]: CMS: no more merges pending; now return
IW 0 [http-8080-1]: CMS: now merge
IW 0 [http-8080-1]: CMS: index: _17:c2765
IW 0 [http-8080-1]: CMS: no more merges pending; now return
IW 0 [http-8080-1]: now call final commit()
IW 0 [http-8080-1]: startCommit(): start sizeInBytes=0
IW 0 [http-8080-1]: startCommit index=_17:c2765 changeCount=5
IW 0 [http-8080-1]: now sync _17.cfs
IW 0 [http-8080-1]: done all syncs
IW 0 [http-8080-1]: commit: pendingCommit != null
IW 0 [http-8080-1]: commit: wrote segments file "segments_1k"
IFD [http-8080-1]: now checkpoint "segments_1k" [1 segments ; isCommit = true]
IFD [http-8080-1]: deleteCommits: now decRef commit "segments_1j"
IFD [http-8080-1]: delete "_16.cfs"
IFD [http-8080-1]: delete "segments_1j"
IW 0 [http-8080-1]: commit: done
IW 0 [http-8080-1]: at close: _17:c2765
IFD [http-8080-1]: setInfoStream
deletionpolicy=org.apache.lucene.index.keeponlylastcommitdeletionpol...@fb1ba7
IW 1 [http-8080-1]: setInfoStream:
dir=org.apache.lucene.store.simplefsdirect...@c:\Documents and
Settings\rvarlikli\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Clipbank3.5\lucene
autoCommit=false
mergepolicy=org.apache.lucene.index.logbytesizemergepol...@1d49559
mergescheduler=org.apache.lucene.index.concurrentmergeschedu...@1990e2d
ramBufferSizeMB=16.0 maxBufferedDocs=-1 maxBuffereDeleteTerms=-1
maxFieldLength=10000 index=
IW 1 [http-8080-1]: now flush at close
IW 1 [http-8080-1]: flush: segment=_18 docStoreSegment=_18 docStoreOffset=0
flushDocs=true flushDeletes=true flushDocStores=true numDocs=2765
numBufDelTerms=0
IW 1 [http-8080-1]: index before flush
IW 1 [http-8080-1]: DW: flush postings as segment _18 numDocs=2765
IW 1 [http-8080-1]: DW: closeDocStore: 2 files to flush to segment _18
numDocs=2765
IW 1 [http-8080-1]: DW: oldRAMSize=9517056 newFlushedSize=4042307
docs/MB=717.242 new/old=42.474%
IFD [http-8080-1]: now checkpoint "segments_1k" [1 segments ; isCommit = false]
IFD [http-8080-1]: now checkpoint "segments_1k" [1 segments ; isCommit = false]
IFD [http-8080-1]: delete "_18.nrm"
IFD [http-8080-1]: delete "_18.frq"
IFD [http-8080-1]: delete "_18.fdx"
IFD [http-8080-1]: delete "_18.tii"
IFD [http-8080-1]: delete "_18.fdt"
IFD [http-8080-1]: delete "_18.prx"
IFD [http-8080-1]: delete "_18.fnm"
IFD [http-8080-1]: delete "_18.tis"
IFD [http-8080-1]: now checkpoint "segments_1k" [1 segments ; isCommit = false]
IW 1 [http-8080-1]: LMP: findMerges: 1 segments
IW 1 [http-8080-1]: LMP: level 6.2247195 to 6.6112633: 1 segments
IW 1 [http-8080-1]: CMS: now merge
IW 1 [http-8080-1]: CMS: index: _18:c2765
IW 1 [http-8080-1]: CMS: no more merges pending; now return
IW 1 [http-8080-1]: CMS: now merge
IW 1 [http-8080-1]: CMS: index: _18:c2765
IW 1 [http-8080-1]: CMS: no more merges pending; now return
IW 1 [http-8080-1]: now call final commit()
IW 1 [http-8080-1]: startCommit(): start sizeInBytes=0
IW 1 [http-8080-1]: startCommit index=_18:c2765 changeCount=5
IW 1 [http-8080-1]: now sync _18.cfs
IW 1 [http-8080-1]: done all syncs
IW 1 [http-8080-1]: commit: pendingCommit != null
IW 1 [http-8080-1]: commit: wrote segments file "segments_1l"
IFD [http-8080-1]: now checkpoint "segments_1l" [1 segments ; isCommit = true]
IFD [http-8080-1]: deleteCommits: now decRef commit "segments_1k"
IFD [http-8080-1]: delete "segments_1k"
IFD [http-8080-1]: delete "_17.cfs"
IW 1 [http-8080-1]: commit: done
IW 1 [http-8080-1]: at close: _18:c2765
IFD [http-8080-1]: setInfoStream
deletionpolicy=org.apache.lucene.index.keeponlylastcommitdeletionpol...@7ceec1
IW 2 [http-8080-1]: setInfoStream:
dir=org.apache.lucene.store.simplefsdirect...@c:\Documents and
Settings\rvarlikli\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Clipbank3.5\lucene
autoCommit=false
mergepolicy=org.apache.lucene.index.logbytesizemergepol...@1edacc
mergescheduler=org.apache.lucene.index.concurrentmergeschedu...@1ae9ba8
ramBufferSizeMB=16.0 maxBufferedDocs=-1 maxBuffereDeleteTerms=-1
maxFieldLength=10000 index=
IW 2 [http-8080-1]: now flush at close
IW 2 [http-8080-1]: flush: segment=_19 docStoreSegment=_19 docStoreOffset=0
flushDocs=true flushDeletes=true flushDocStores=true numDocs=2765
numBufDelTerms=0
IW 2 [http-8080-1]: index before flush
IW 2 [http-8080-1]: DW: flush postings as segment _19 numDocs=2765
IW 2 [http-8080-1]: DW: closeDocStore: 2 files to flush to segment _19
numDocs=2765
IW 2 [http-8080-1]: DW: oldRAMSize=11188224 newFlushedSize=5229106
docs/MB=554.457 new/old=46.738%
IFD [http-8080-1]: now checkpoint "segments_1l" [1 segments ; isCommit = false]
IFD [http-8080-1]: now checkpoint "segments_1l" [1 segments ; isCommit = false]
IFD [http-8080-1]: delete "_19.tis"
IFD [http-8080-1]: delete "_19.prx"
IFD [http-8080-1]: delete "_19.nrm"
IFD [http-8080-1]: delete "_19.fnm"
IFD [http-8080-1]: delete "_19.fdx"
IFD [http-8080-1]: delete "_19.fdt"
IFD [http-8080-1]: delete "_19.tii"
IFD [http-8080-1]: delete "_19.frq"
IFD [http-8080-1]: now checkpoint "segments_1l" [1 segments ; isCommit = false]
IW 2 [http-8080-1]: LMP: findMerges: 1 segments
IW 2 [http-8080-1]: LMP: level 6.2247195 to 6.722014: 1 segments
IW 2 [http-8080-1]: CMS: now merge
IW 2 [http-8080-1]: CMS: index: _19:c2765
IW 2 [http-8080-1]: CMS: no more merges pending; now return
IW 2 [http-8080-1]: CMS: now merge
IW 2 [http-8080-1]: CMS: index: _19:c2765
IW 2 [http-8080-1]: CMS: no more merges pending; now return
IW 2 [http-8080-1]: now call final commit()
IW 2 [http-8080-1]: startCommit(): start sizeInBytes=0
IW 2 [http-8080-1]: startCommit index=_19:c2765 changeCount=5
IW 2 [http-8080-1]: now sync _19.cfs
IW 2 [http-8080-1]: done all syncs
IW 2 [http-8080-1]: commit: pendingCommit != null
IW 2 [http-8080-1]: commit: wrote segments file "segments_1m"
IFD [http-8080-1]: now checkpoint "segments_1m" [1 segments ; isCommit = true]
IFD [http-8080-1]: deleteCommits: now decRef commit "segments_1l"
IFD [http-8080-1]: delete "_18.cfs"
IFD [http-8080-1]: delete "segments_1l"
IW 2 [http-8080-1]: commit: done
IW 2 [http-8080-1]: at close: _19:c2765
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