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From Jigar Shah <jigaronl...@gmail.com>
Subject Re: Lucene 6.6: "Too many open files"
Date Tue, 01 Aug 2017 03:56:55 GMT
I faced such problem when I used nomergepolicy, and did some code to manual
merging segments which had bug and I had same issue. Make sure you have
default AFAIR ConcurrentMergeStrategy enabled. And its is configured with
appropriate settings.

On Jul 31, 2017 11:21 PM, "Erick Erickson" <erickerickson@gmail.com> wrote:

> No, nothing's changed fundamentally. But you say:
>
> "We have some batch indexing scripts, which
> flood the solr servers with indexing requests (while keeping open-searcher
> false)"
>
> What is your commit interval? Regardless of whether openSearcher is false
> or not, background merging continues apace with every commit. By any chance
> did you change your merge policy (or not copy the one from 4x to 6x)? Shot
> in the dark...
>
> Best,
> Erick
>
> On Mon, Jul 31, 2017 at 7:15 PM, Nawab Zada Asad Iqbal <khichi@gmail.com>
> wrote:
> > Hi,
> >
> > I am upgrading from solr4.5 to solr6.6 and hitting this issue during
> > complete reindexing scenario.  We have some batch indexing scripts, which
> > flood the solr servers with indexing requests (while keeping
> open-searcher
> > false) for many hours and then perform one commit. This used to work fine
> > with 4.5, but with 6.6, i get 'Too many open files' within a couple of
> > minutes. I have checked that "ulimit" is same between old and new
> servers.
> >
> > Has something fundamentally changed in recent lucene versions, which
> keeps
> > file descriptors around for a longer time?
> >
> >
> > Here is a sample error message:
> >     at org.apache.lucene.index.IndexWriter.ensureOpen(
> IndexWriter.java:749)
> >     at org.apache.lucene.index.IndexWriter.ensureOpen(
> IndexWriter.java:763)
> >     at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3206)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.commit(
> DirectUpdateHandler2.java:644)
> >     at
> > org.apache.solr.update.processor.RunUpdateProcessor.processCommit(
> RunUpdateProcessorFactory.java:93)
> >     at
> > org.apache.solr.update.processor.UpdateRequestProcessor.processCommit(
> UpdateRequestProcessor.java:68)
> >     at
> > org.apache.solr.update.processor.DistributedUpdateProcessor.
> doLocalCommit(DistributedUpdateProcessor.java:1894)
> >     at
> > org.apache.solr.update.processor.DistributedUpdateProcessor.
> processCommit(DistributedUpdateProcessor.java:1871)
> >     at
> > org.apache.solr.update.processor.LogUpdateProcessorFactory$
> LogUpdateProcessor.processCommit(LogUpdateProcessorFactory.java:160)
> >     at
> > org.apache.solr.update.processor.UpdateRequestProcessor.processCommit(
> UpdateRequestProcessor.java:68)
> >     at
> > org.apache.solr.handler.RequestHandlerUtils.handleCommit(
> RequestHandlerUtils.java:68)
> >     at
> > org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(
> ContentStreamHandlerBase.java:62)
> >     at
> > org.apache.solr.handler.RequestHandlerBase.handleRequest(
> RequestHandlerBase.java:173)
> >     at org.apache.solr.core.SolrCore.execute(SolrCore.java:2477)
> >     at org.apache.solr.servlet.HttpSolrCall.execute(
> HttpSolrCall.java:723)
> >     at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:529)
> >     at
> > org.apache.solr.servlet.SolrDispatchFilter.doFilter(
> SolrDispatchFilter.java:361)
> >     at
> > org.apache.solr.servlet.SolrDispatchFilter.doFilter(
> SolrDispatchFilter.java:305)
> >     at
> > org.eclipse.jetty.servlet.ServletHandler$CachedChain.
> doFilter(ServletHandler.java:1691)
> >     at
> > org.eclipse.jetty.servlet.ServletHandler.doHandle(
> ServletHandler.java:582)
> >     at
> > org.eclipse.jetty.server.handler.ScopedHandler.handle(
> ScopedHandler.java:143)
> >     at
> > org.eclipse.jetty.security.SecurityHandler.handle(
> SecurityHandler.java:548)
> >     at
> > org.eclipse.jetty.server.session.SessionHandler.
> doHandle(SessionHandler.java:226)
> >     at
> > org.eclipse.jetty.server.handler.ContextHandler.
> doHandle(ContextHandler.java:1180)
> >     at
> > org.eclipse.jetty.servlet.ServletHandler.doScope(
> ServletHandler.java:512)
> >     at
> > org.eclipse.jetty.server.session.SessionHandler.
> doScope(SessionHandler.java:185)
> >     at
> > org.eclipse.jetty.server.handler.ContextHandler.
> doScope(ContextHandler.java:1112)
> >     at
> > org.eclipse.jetty.server.handler.ScopedHandler.handle(
> ScopedHandler.java:141)
> >     at
> > org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(
> ContextHandlerCollection.java:213)
> >     at
> > org.eclipse.jetty.server.handler.HandlerCollection.
> handle(HandlerCollection.java:119)
> >     at
> > org.eclipse.jetty.server.handler.HandlerWrapper.handle(
> HandlerWrapper.java:134)
> >     at
> > org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(
> RewriteHandler.java:335)
> >     at
> > org.eclipse.jetty.server.handler.HandlerWrapper.handle(
> HandlerWrapper.java:134)
> >     at org.eclipse.jetty.server.Server.handle(Server.java:534)
> >     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
> >     at
> > org.eclipse.jetty.server.HttpConnection.onFillable(
> HttpConnection.java:251)
> >     at
> > org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(
> AbstractConnection.java:273)
> >     at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
> >     at
> > org.eclipse.jetty.io.SelectChannelEndPoint$2.run(
> SelectChannelEndPoint.java:93)
> >     at
> > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.
> executeProduceConsume(ExecuteProduceConsume.java:303)
> >     at
> > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.
> produceConsume(ExecuteProduceConsume.java:148)
> >     at
> > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(
> ExecuteProduceConsume.java:136)
> >     at
> > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(
> QueuedThreadPool.java:671)
> >     at
> > org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(
> QueuedThreadPool.java:589)
> >     at java.lang.Thread.run(Thread.java:748)
> > Caused by: java.nio.file.FileSystemException:
> > /local/var/solr/shard2/filesearch/data/index/_34w5.fdx: Too many open
> files
> >     at
> > sun.nio.fs.UnixException.translateToIOException(UnixException.java:91)
> >     at sun.nio.fs.UnixException.rethrowAsIOException(
> UnixException.java:102)
> >     at sun.nio.fs.UnixException.rethrowAsIOException(
> UnixException.java:107)
> >     at
> > sun.nio.fs.UnixFileSystemProvider.newByteChannel(
> UnixFileSystemProvider.java:214)
> >     at
> > java.nio.file.spi.FileSystemProvider.newOutputStream(
> FileSystemProvider.java:434)
> >     at java.nio.file.Files.newOutputStream(Files.java:216)
> >     at
> > org.apache.lucene.store.FSDirectory$FSIndexOutput.&lt;
> init&gt;(FSDirectory.java:413)
> >     at
> > org.apache.lucene.store.FSDirectory$FSIndexOutput.&lt;
> init&gt;(FSDirectory.java:409)
> >     at
> > org.apache.lucene.store.FSDirectory.createOutput(FSDirectory.java:253)
> >     at
> > org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(
> LockValidatingDirectoryWrapper.java:44)
> >     at
> > org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(
> TrackingDirectoryWrapper.java:43)
> >     at
> > org.apache.lucene.codecs.compressing.CompressingStoredFieldsWriter.
> &lt;init&gt;(CompressingStoredFieldsWriter.java:114)
> >     at
> > org.apache.lucene.codecs.compressing.CompressingStoredFieldsFormat.
> fieldsWriter(CompressingStoredFieldsFormat.java:128)
> >     at
> > org.apache.lucene.codecs.lucene50.Lucene50StoredFieldsFormat.
> fieldsWriter(Lucene50StoredFieldsFormat.java:183)
> >     at
> > org.apache.lucene.index.StoredFieldsConsumer.initStoredFieldsWriter(
> StoredFieldsConsumer.java:39)
> >     at
> > org.apache.lucene.index.StoredFieldsConsumer.startDocument(
> StoredFieldsConsumer.java:46)
> >     at
> > org.apache.lucene.index.DefaultIndexingChain.startStoredFields(
> DefaultIndexingChain.java:364)
> >     at
> > org.apache.lucene.index.DefaultIndexingChain.processDocument(
> DefaultIndexingChain.java:398)
> >     at
> > org.apache.lucene.index.DocumentsWriterPerThread.updateDocument(
> DocumentsWriterPerThread.java:232)
> >     at
> > org.apache.lucene.index.DocumentsWriter.updateDocument(
> DocumentsWriter.java:478)
> >     at
> > org.apache.lucene.index.IndexWriter.updateDocument(
> IndexWriter.java:1571)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.updateDocument(
> DirectUpdateHandler2.java:924)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.updateDocOrDocValues(
> DirectUpdateHandler2.java:913)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.doNormalUpdate(
> DirectUpdateHandler2.java:302)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.addDoc0(
> DirectUpdateHandler2.java:239)
> >     at
> > org.apache.solr.update.DirectUpdateHandler2.addDoc(
> DirectUpdateHandler2.java:194)
> >     at
> > org.apache.solr.update.processor.RunUpdateProcessor.processAdd(
> RunUpdateProcessorFactory.java:67)
> >     at
> > org.apache.solr.update.processor.UpdateRequestProcessor.processAdd(
> UpdateRequestProcessor.java:55)
> >     at
> > org.apache.solr.update.processor.DistributedUpdateProcessor.versionAdd(
> DistributedUpdateProcessor.java:1005)
> >     at
> > org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(
> DistributedUpdateProcessor.java:748)
> >     at
> > org.apache.solr.update.processor.LogUpdateProcessorFactory$
> LogUpdateProcessor.processAdd(LogUpdateProcessorFactory.java:103)
> >     at
> > org.apache.solr.update.processor.UpdateRequestProcessor.processAdd(
> UpdateRequestProcessor.java:55)
> >     at
> > org.apache.solr.update.processor.LanguageIdentifierUpdateProces
> sor.processAdd(LanguageIdentifierUpdateProcessor.java:205)
> >     at
> > org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:
> 261)
> >     at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:188)
> >     at
> > org.apache.solr.handler.UpdateRequestHandler$1.load(
> UpdateRequestHandler.java:97)
> >     at
> > org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(
> ContentStreamHandlerBase.java:68)
> >     ... 33 more
> >
> >
> >
> > Thanks
> > Nawab
>
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