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https://issues.apache.org/jira/browse/SOLR-2024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sami Siren resolved SOLR-2024.
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Resolution: Won't Fix
SOLR-1711 was fixed in 3.1 and 4.0.
I think that there will be no more releases from 1.4.x branch so I am closing
this as Won't Fix.
> StreamingUpdateSolrServer encounters ConcurrentModificationException
> --------------------------------------------------------------------
>
> Key: SOLR-2024
> URL: https://issues.apache.org/jira/browse/SOLR-2024
> Project: Solr
> Issue Type: Bug
> Components: clients - java
> Affects Versions: 1.4.1
> Reporter: Reuben Firmin
>
> We are intermittently encountering this bug when using the
> StreamingUpdateSolrServer. It appears to be caused by many near-simultaneous
> requests to the add method. We were initially using 1.4 dev, but have since
> updated to 1.4.1, and are still encountering the issue.
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> org.hibernate.collection.AbstractPersistentCollection$IteratorProxy.next(AbstractPersistentCollection.java:577)
> at
> org.apache.solr.client.solrj.util.ClientUtils.writeXML(ClientUtils.java:105)
> at
> org.apache.solr.client.solrj.request.UpdateRequest.writeXML(UpdateRequest.java:213)
> at
> org.apache.solr.client.solrj.impl.StreamingUpdateSolrServer$Runner$1.writeRequest(StreamingUpdateSolrServer.java:100)
> at
> org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:499)
> at
> org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:2114)
> at
> org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1096)
> at
> org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
> at
> org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
> at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
> at
> org.apache.solr.client.solrj.impl.StreamingUpdateSolrServer$Runner.run(StreamingUpdateSolrServer.java:137)
> 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:619)
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