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https://issues.apache.org/jira/browse/SOLR-13591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16876970#comment-16876970
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Jason Gerlowski commented on SOLR-13591:
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AlreadyClosedException sounds like it _could_ be ZooKeeper connection issues.
Have you looked at the ZK logs to rule that out? With just the stacktrace (for
an IO issue that comes up frequently), I'm not sure this JIRA is very
actionable.
> AlreadyClosedException in SolrJ
> -------------------------------
>
> Key: SOLR-13591
> URL: https://issues.apache.org/jira/browse/SOLR-13591
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 8.1.1
> Reporter: Markus Jelsma
> Priority: Major
> Fix For: master (9.0), 8.2
>
>
> Since upgrading from 7.7 to 8.1, we regulary get the following exception in
> SolrJ. The message is null, the stack trace is:
> {code}
> org.apache.solr.common.AlreadyClosedException
> at
> org.apache.solr.client.solrj.impl.ZkClientClusterStateProvider.getZkStateReader(ZkClientClusterStateProvider.java:165)
> at
> org.apache.solr.client.solrj.impl.ZkClientClusterStateProvider.connect(ZkClientClusterStateProvider.java:160)
> at
> org.apache.solr.client.solrj.impl.BaseCloudSolrClient.connect(BaseCloudSolrClient.java:329)
> at
> org.apache.solr.client.solrj.impl.BaseCloudSolrClient.requestWithRetryOnStaleState(BaseCloudSolrClient.java:779)
> at
> org.apache.solr.client.solrj.impl.BaseCloudSolrClient.request(BaseCloudSolrClient.java:769)
> at
> org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:207)
> at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:987)
> at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1002)
> {code}
> The clients are always 8.1.1, the servers are either 7.5 or 8.1.1. There are
> no indications in the server logs, although they are set to log level WARN.
> We run Zookeeper 3.4.13.
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