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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