Yes, excactly, that's it. But is it a Lucene or a Solr problem? Should Solr use a different reader from DBQ or can Lucene do something to solve this because it is reported as a Lucene issue?
Regards Bernd Am 04.08.2016 um 16:02 schrieb Mikhail Khludnev: > Hello, > There is https://issues.apache.org/jira/browse/LUCENE-7049 > > > On Thu, Aug 4, 2016 at 4:35 PM, Michael McCandless < > luc...@mikemccandless.com> wrote: > >> Lucene's merging is concurrent, but Solr unfortunately uses >> UninvertingReader on each DBQ ... I'm not sure why. I think you should ask >> on the solr-user list? >> >> Or maybe try to change your deletes to be by Term instead of Query? >> >> Mike McCandless >> >> http://blog.mikemccandless.com >> >> On Thu, Aug 4, 2016 at 7:03 AM, Bernd Fehling < >> bernd.fehl...@uni-bielefeld.de> wrote: >> >>> While increasing the indexing load of version 5.5.3 I see >>> threads where one merging thread is blocking other merging threads. >>> But is this concurrent merging? >>> >>> Bernd >>> >>> "Lucene Merge Thread #6" - Thread t@40280 java.lang.Thread.State: >>> BLOCKED >>> at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4008) >>> - waiting to lock <6d75db> (a org.apache.solr.update.SolrIndexWriter) >>> owned by "Lucene Merge Thread #8" t@53896 >>> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3655) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626) >>> Locked ownable synchronizers: - None >>> >>> "Lucene Merge Thread #7" - Thread t@40281 java.lang.Thread.State: >>> BLOCKED >>> at >> org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4166) >>> - waiting to lock <6d75db> (a org.apache.solr.update.SolrIndexWriter) >>> owned by "Lucene Merge Thread #8" t@53896 >>> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3655) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626) >>> Locked ownable synchronizers: - None >>> >>> "Lucene Merge Thread #8" - Thread t@53896 java.lang.Thread.State: >>> RUNNABLE >>> at java.lang.System.identityHashCode(Native Method) >>> at org.apache.lucene.index.IndexReader.hashCode(IndexReader.java:302) >>> at java.util.WeakHashMap.hash(WeakHashMap.java:298) >>> at java.util.WeakHashMap.put(WeakHashMap.java:449) >>> at java.util.Collections$SetFromMap.add(Collections.java:5461) >>> at >> java.util.Collections$SynchronizedCollection.add(Collections.java:2035) >>> - locked <4c8b5399> (a java.util.Collections$SynchronizedSet) >>> at >>> >> org.apache.lucene.index.IndexReader.registerParentReader(IndexReader.java:138) >>> at >>> >> org.apache.lucene.index.FilterLeafReader.<init>(FilterLeafReader.java:306) >>> at >>> >> org.apache.lucene.uninverting.UninvertingReader.<init>(UninvertingReader.java:184) >>> at >>> >> org.apache.solr.update.DeleteByQueryWrapper.wrap(DeleteByQueryWrapper.java:52) >>> at >>> >> org.apache.solr.update.DeleteByQueryWrapper.createWeight(DeleteByQueryWrapper.java:72) >>> at >>> >> org.apache.lucene.search.IndexSearcher.createWeight(IndexSearcher.java:904) >>> at >>> >> org.apache.lucene.search.IndexSearcher.createNormalizedWeight(IndexSearcher.java:887) >>> at >>> >> org.apache.lucene.index.BufferedUpdatesStream.applyQueryDeletes(BufferedUpdatesStream.java:713) >>> at >>> >> org.apache.lucene.index.BufferedUpdatesStream.applyDeletesAndUpdates(BufferedUpdatesStream.java:246) >>> - locked <9f8d81c> (a org.apache.lucene.index.BufferedUpdatesStream) >>> at org.apache.lucene.index.IndexWriter._mergeInit(IndexWriter.java:3834) >>> - locked <6d75db> (a org.apache.solr.update.SolrIndexWriter) >>> at org.apache.lucene.index.IndexWriter.mergeInit(IndexWriter.java:3792) >>> - locked <6d75db> (a org.apache.solr.update.SolrIndexWriter) >>> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3646) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588) >>> at >>> >> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626) >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>> >>> >> > > > -- ************************************************************* Bernd Fehling Bielefeld University Library Dipl.-Inform. (FH) LibTec - Library Technology Universitätsstr. 25 and Knowledge Management 33615 Bielefeld Tel. +49 521 106-4060 bernd.fehling(at)uni-bielefeld.de BASE - Bielefeld Academic Search Engine - www.base-search.net ************************************************************* --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
