title: SocketException Broken pipe in Solr/tomcat
body: <p>I'm using Solr 4.3 with tomcat7. When the number of concurrent writes and reads increase it is crash throwing this SocketException error. I do concurrent commits and searches through multiple clients. Any kind of help is appreciated. Here is the tomcat log(catalina.out) and solr.log</p>
  
  <pre><code> tomcat log(catalina.out):
  
      59887611 [http-bio-8080-exec-988] ERROR org.apache.solr.servlet.SolrDispatchFilter  – null:ClientAbortException:  java.net.SocketException: Broken pipe
       at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:406)
       at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:342)
       at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:431)
       at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:419)
       at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:91)
       at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
       at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:282)
       at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
       at java.io.OutputStreamWriter.write(OutputStreamWriter.java:207)
       at org.apache.solr.util.FastWriter.flush(FastWriter.java:141)
       at org.apache.solr.util.FastWriter.write(FastWriter.java:126)
       at java.io.Writer.write(Writer.java:157)
       at org.apache.solr.response.XMLWriter.startTag(XMLWriter.java:144)
       at org.apache.solr.response.XMLWriter.writePrim(XMLWriter.java:347)
       at org.apache.solr.response.XMLWriter.writeLong(XMLWriter.java:305)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:139)
       at org.apache.solr.schema.TrieField.write(TrieField.java:221)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:130)
       at org.apache.solr.response.XMLWriter.writeSolrDocument(XMLWriter.java:199)
       at org.apache.solr.response.TextResponseWriter.writeDocuments(TextResponseWriter.java:275)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:172)
       at org.apache.solr.response.XMLWriter.writeResponse(XMLWriter.java:111)
       at org.apache.solr.response.XMLResponseWriter.write(XMLResponseWriter.java:39)
       at org.apache.solr.servlet.SolrDispatchFilter.writeResponse(SolrDispatchFilter.java:644)
       at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:372)
       at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
       at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
       at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
       at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
       at java.lang.Thread.run(Thread.java:724)
      Caused by: java.net.SocketException: Broken pipe
       at java.net.SocketOutputStream.socketWrite0(Native Method)
       at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
       at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
       at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:215)
       at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480)
       at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:366)
       at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:240)
       at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:119)
       at org.apache.coyote.http11.AbstractOutputBuffer.doWrite(AbstractOutputBuffer.java:192)
       at org.apache.coyote.Response.doWrite(Response.java:517)
       at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:401)
       ... 39 more
  
  
           solr.log:
  
  
  
      2013-09-19 05:32:13.978; org.apache.solr.common.SolrException; null:ClientAbortException:  java.net.SocketException: Broken pipe
       at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:406)
       at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:342)
       at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:431)
       at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:419)
       at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:91)
       at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
       at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:282)
       at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
       at java.io.OutputStreamWriter.write(OutputStreamWriter.java:207)
       at org.apache.solr.util.FastWriter.flush(FastWriter.java:141)
       at org.apache.solr.util.FastWriter.write(FastWriter.java:126)
       at java.io.Writer.write(Writer.java:157)
       at org.apache.solr.response.XMLWriter.startTag(XMLWriter.java:144)
       at org.apache.solr.response.XMLWriter.writePrim(XMLWriter.java:347)
       at org.apache.solr.response.XMLWriter.writeLong(XMLWriter.java:305)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:139)
       at org.apache.solr.schema.TrieField.write(TrieField.java:221)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:130)
       at org.apache.solr.response.XMLWriter.writeSolrDocument(XMLWriter.java:199)
       at org.apache.solr.response.TextResponseWriter.writeDocuments(TextResponseWriter.java:275)
       at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:172)
       at org.apache.solr.response.XMLWriter.writeResponse(XMLWriter.java:111)
       at org.apache.solr.response.XMLResponseWriter.write(XMLResponseWriter.java:39)
       at org.apache.solr.servlet.SolrDispatchFilter.writeResponse(SolrDispatchFilter.java:644)
       at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:372)
       at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
       at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
       at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
       at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
       at java.lang.Thread.run(Thread.java:724)
      Caused by: java.net.SocketException: Broken pipe
       at java.net.SocketOutputStream.socketWrite0(Native Me...
  </code></pre>