Hello,
I'm having an issue with the IndexWriter in Lucene 2.3.1. Specifically, the
IndexWriter.close() method is non-deterministically hanging with the following
stack:
"""
Thread 23044: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be
imprecise)
- java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
- org.apache.lucene.index.IndexWriter.finishMerges(boolean) @bci=306,
line=2063 (Interpreted frame)
- org.apache.lucene.index.IndexWriter.closeInternal(boolean) @bci=35,
line=1208 (Interpreted frame)
- org.apache.lucene.index.IndexWriter.close(boolean) @bci=41, line=1178
(Interpreted frame)
- org.apache.lucene.index.IndexWriter.close() @bci=2, line=1153 (Interpreted
frame)
- us.webmail.solr.merge.MergeTask.execute() @bci=234, line=237 (Interpreted
frame)
- us.webmail.solr.merge.MergeAgent.run(java.lang.String[]) @bci=455, line=521
(Interpreted frame)
- org.apache.hadoop.util.ToolRunner.run(org.apache.hadoop.conf.Configuration,
org.apache.hadoop.util.Tool, java.lang.String[]) @bci=38, line=65 (Interpreted
frame)
- org.apache.hadoop.util.ToolBase.doMain(org.apache.hadoop.conf.Configuration,
java.lang.String[]) @bci=3, line=54 (Interpreted frame)
- us.webmail.solr.merge.MergeAgent.main(java.lang.String[]) @bci=17, line=572
(Interpreted frame)
- sun.reflect.NativeMethodAccessorImpl.invoke0(java.lang.reflect.Method,
java.lang.Object, java.lang.Object[]) @bci=0 (Interpreted frame)
- sun.reflect.NativeMethodAccessorImpl.invoke(java.lang.Object,
java.lang.Object[]) @bci=87, line=39 (Interpreted frame)
- sun.reflect.DelegatingMethodAccessorImpl.invoke(java.lang.Object,
java.lang.Object[]) @bci=6, line=25 (Interpreted frame)
- java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[])
@bci=161, line=597 (Interpreted frame)
- org.apache.hadoop.util.RunJar.main(java.lang.String[]) @bci=538, line=155
(Interpreted frame)
"""
My IndexWriter opening code looks like this:
"""
// open the destination index
this.targetDirectory = null;
try{
this.targetDirectory = FSDirectory.getDirectory(getDD(this.targetInstance),
new NativeFSLockFactory(getDD(this.targetInstance)));
this.targetIndex = new IndexWriter(this.targetDirectory, null, false);
this.targetIndex.setMergeFactor(MERGE_FACTOR);
this.targetIndex.setUseCompoundFile(false);
// this.targetIndex.setInfoStream(System.out);
this.targetIndex.setMergeScheduler(new SerialMergeScheduler());
} catch (Exception e){
if(this.targetDirectory != null){
this.targetDirectory.close();
}
throw new IOException("Could not open target instance: " + e.toString());
}
"""
After adding a bunch of indexes with IndexWriter.addIndexes(Directory[]), I run
"""
System.out.println("Closing the target index...");
this.targetIndex.close();
System.out.println("...done.\nClosing the target directory...");
this.targetDirectory.close();
System.out.println("...done.");
"""
... and the output clearly shows that we get stuck in close.
-------------------------------------------------------------
Is this a known bug? Does anyone know of a workaround?
Stu Hood
Architecture Software Developer
Mailtrust, a Division of Rackspace
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