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https://issues.apache.org/jira/browse/SOLR-5402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13809833#comment-13809833
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Sai Gadde commented on SOLR-5402:
---------------------------------
I even tried adding 1 document at a time. Still the problem is present.
If there is only one server there no errors, everything works fine. updating
even 500 documents is fine.
But when another node comes online SolrCmdDistributor gets these exceptions
from remote server response. New Solr node also prints it's own error stack as
explained in the report above.
This exact same setup works without issues in 4.4.0. I tried with both 4.5.0
and 4.5.1 and both produce same errors
> SolrCloud 4.5 bulk add errors in cloud setup
> --------------------------------------------
>
> Key: SOLR-5402
> URL: https://issues.apache.org/jira/browse/SOLR-5402
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.5, 4.5.1
> Reporter: Sai Gadde
> Fix For: 4.6
>
>
> We use out of the box Solr 4.5.1 no customization done. If we merge documents
> via SolrJ to a single server it is perfectly working fine.
> But as soon as we add another node to the cloud we are getting following
> while merging documents. We merge about 500 at a time using SolrJ. These 500
> documents in total are about few MB (1-3) in size.
> This is the error we are getting on the server (10.10.10.116 - IP is
> irrelavent just for clarity)where merging is happening. 10.10.10.119 is the
> new node here. This server gets RemoteSolrException
> shard update error StdNode:
> http://10.10.10.119:8980/solr/mycore/:org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:
> Illegal to have multiple roots (start tag in epilog?).
> at [row,col {unknown-source}]: [1,12468]
> at
> org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:425)
> at
> org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:180)
> at
> org.apache.solr.update.SolrCmdDistributor$1.call(SolrCmdDistributor.java:401)
> at
> org.apache.solr.update.SolrCmdDistributor$1.call(SolrCmdDistributor.java:1)
> at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
> at java.util.concurrent.FutureTask.run(Unknown Source)
> at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
> at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
> at java.util.concurrent.FutureTask.run(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
> On the other server 10.10.10.119 we get following error
> org.apache.solr.common.SolrException: Illegal to have multiple roots (start
> tag in epilog?).
> at [row,col {unknown-source}]: [1,12468]
> at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:176)
> at
> org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92)
> at
> org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:1859)
> at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:703)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:406)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:195)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
> at
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: com.ctc.wstx.exc.WstxParsingException: Illegal to have multiple
> roots (start tag in epilog?).
> at [row,col {unknown-source}]: [1,12369]
> at
> com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:630)
> at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:461)
> at
> com.ctc.wstx.sr.BasicStreamReader.handleExtraRoot(BasicStreamReader.java:2155)
> at
> com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2070)
> at
> com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2647)
> at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1019)
> at
> org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:213)
> at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:174)
> ... 22 more
> We tried with 4.5.0 first and then with 4.5.1 later. Both produce exact same
> error.
> Note: This error is not present when we switched exact setup to 4.4.0
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