org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out:

[bramsreddy <br...@gmail.com>]

Hi,

I have solr master slave setup.On master i keep on updating the index using
DIH.I am delta-import requests one after other using some batch job.And my
slave polls for every 20 min to get the updated index from master.But for
delta-import i am getting the following exception 

Error creating document :
SolrInputDocument[{title_nl=title_nl(1.0)={Vodafone  12 maanden icm Sony
Ericsson Xperia X10 mini Pro}, category_nl=category_nl(1.0)={GSM},
id=id(1.0)={474420120}, last_modified=last_modified(1.0)={2011-06-07
01:37:25.066422}}]: org.apache.lucene.store.LockObtainFailedException: Lock
obtain timed out:
SimpleFSLock@/data/solr/data/df-stream-store/index/lucene-47510fa3e31f1e71e7408a128e1ebac1-write.lock
	at org.apache.lucene.store.Lock.obtain(Lock.java:85) [:2.9.3 951790 -
2010-06-06 01:30:55]
	at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1565) [:2.9.3
951790 - 2010-06-06 01:30:55]
	at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1421)
[:2.9.3 951790 - 2010-06-06 01:30:55]
	at org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:191)
[:1.4.1 955763M - mark - 2010-06-17 18:06:42]
	at
org.apache.solr.update.UpdateHandler.createMainIndexWriter(UpdateHandler.java:98)
[:1.4.1 955763M - mark - 2010-06-17 18:06:42]
	at
org.apache.solr.update.DirectUpdateHandler2.openWriter(DirectUpdateHandler2.java:173)
[:1.4.1 955763M - mark - 2010-06-17 18:06:42]
	at
org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:220)
[:1.4.1 955763M - mark - 2010-06-17 18:06:42]
	at
org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProcessorFactory.java:61)
[:1.4.1 955763M - mark - 2010-06-17 18:06:42]
	at org.apache.solr.handler.dataimport.SolrWriter.upload(SolrWriter.java:75)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DataImportHandler$1.upload(DataImportHandler.java:292)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:392)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DocBuilder.doDelta(DocBuilder.java:276)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:172)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DataImporter.doDeltaImport(DataImporter.java:352)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:391)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53]
	at
org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:370)
[:1.4.1 955763M - mark - 2010-06-17 18:06:53] 

Please tell me what are possible reasons for this exception.
Please let me know if you need more information

Thank You.

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