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https://issues.apache.org/jira/browse/SOLR-6146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14025352#comment-14025352
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Jessica Cheng commented on SOLR-6146:
-------------------------------------
[~shalinmangar], we pointed the solrj instance at the wrong zookeeper chroot
(where there's no solrcloud pointing and writing to it), and it seems like the
code blew up because there's no live_nodes. (See stacktrace in description,
"KeeperErrorCode = NoNode for /live_nodes".)
> Leak in CloudSolrServer causing "Too many open files"
> -----------------------------------------------------
>
> Key: SOLR-6146
> URL: https://issues.apache.org/jira/browse/SOLR-6146
> Project: Solr
> Issue Type: Bug
> Components: clients - java, SolrCloud
> Affects Versions: 4.7
> Reporter: Jessica Cheng
> Assignee: Shalin Shekhar Mangar
> Labels: solrcloud, solrj
> Attachments: SOLR-6146.patch, SOLR-6146.patch
>
>
> Due to a misconfiguration in one of our QA clusters, we uncovered a leak in
> CloudSolrServer. If this line throws:
> https://github.com/apache/lucene-solr/blob/branch_4x/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java#L242
> then the instantiated ZkStateReader is leaked.
> Here's the stacktrace of the Exception (we're using a custom build so the
> line numbers won't quite match up, but it gives the idea):
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.connect(CloudSolrServer.java:304)
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.requestWithRetryOnStaleState(CloudSolrServer.java:568)
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.request(CloudSolrServer.java:557)
> at
> org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:117)
> at
> org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:33)
> at
> com.apple.cie.search.client.crossdc.MirroredSolrRequestHandler.handleItem(MirroredSolrRequestHandler.java:100)
> at
> com.apple.cie.search.client.crossdc.MirroredSolrRequestHandler.handleItem(MirroredSolrRequestHandler.java:33)
> at
> com.apple.coda.queueing.CodaQueueConsumer$StreamProcessor.run(CodaQueueConsumer.java:147)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722) Caused by:
> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode =
> NoNode for /live_nodes at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:111) at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at
> org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1468) at
> org.apache.solr.common.cloud.SolrZkClient$6.execute(SolrZkClient.java:256) at
> org.apache.solr.common.cloud.SolrZkClient$6.execute(SolrZkClient.java:253) at
> org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:73)
> at
> org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:253)
> at
> org.apache.solr.common.cloud.ZkStateReader.createClusterStateWatchersAndUpdate(ZkStateReader.java:305)
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.createZkStateReader(CloudSolrServer.java:935)
> at
> org.apache.solr.client.solrj.impl.CloudSolrServer.connect(CloudSolrServer.java:298)
> ... 10 more
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