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Posted to dev@lucene.apache.org by "Reuben Firmin (JIRA)" <ji...@apache.org> on 2010/08/03 18:28:21 UTC
[jira] Created: (SOLR-2024) StreamingUpdateSolrServer encounters
ConcurrentModificationException
StreamingUpdateSolrServer encounters ConcurrentModificationException
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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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[jira] Commented: (SOLR-2024) StreamingUpdateSolrServer encounters
ConcurrentModificationException
Posted by "Reuben Firmin (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-2024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12894921#action_12894921 ]
Reuben Firmin commented on SOLR-2024:
-------------------------------------
FWIW this appears to be SOLR-1711, but I opened a new bug rather than commenting on that, since it is closed.
> 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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