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Date: Thu, 21 Apr 2016 20:48:13 +0000 (UTC)
From: "Anshum Gupta (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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 <JIRA.12934145.1453824547910@arcas>
Subject: [jira] [Reopened] (SOLR-8599) Errors in construction of
 SolrZooKeeper cause Solr to go into an inconsistent state
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     [ https://issues.apache.org/jira/browse/SOLR-8599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Anshum Gupta reopened SOLR-8599:
--------------------------------

I see this in the CHANGE log for 6.0 but there's no Fix version. I guess this was just a mistake. Please correct me if I'm missing something here.

> Errors in construction of SolrZooKeeper cause Solr to go into an inconsistent state
> -----------------------------------------------------------------------------------
>
>                 Key: SOLR-8599
>                 URL: https://issues.apache.org/jira/browse/SOLR-8599
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>            Reporter: Keith Laban
>            Assignee: Dennis Gove
>             Fix For: master, 6.0, 5.5.1
>
>         Attachments: SOLR-8599.patch, SOLR-8599.patch, SOLR-8599.patch, SOLR-8599.patch
>
>
> We originally saw this happen due to a DNS exception (see stack trace below). Although any exception thrown in the constructor of SolrZooKeeper or the parent class, ZooKeeper, will cause DefaultConnectionStrategy to fail to update the zookeeper client. Once it gets into this state, it will not try to connect again until the process is restarted. The node itself will also respond successfully to query requests, but not to update requests.
> Two things should be address here:
> 1) Fix the error handling and issue some number of retries
> 2) If we are stuck in a state like this stop responding to all requests 
> {code}
> 2016-01-23 13:49:20.222 ERROR ConnectionManager [main-EventThread] - :java.net.UnknownHostException: HOSTNAME: unknown error
> at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
> at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
> at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
> at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
> at java.net.InetAddress.getAllByName(InetAddress.java:1192)
> at java.net.InetAddress.getAllByName(InetAddress.java:1126)
> at org.apache.zookeeper.client.StaticHostProvider.<init>(StaticHostProvider.java:61)
> at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:445)
> at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:380)
> at org.apache.solr.common.cloud.SolrZooKeeper.<init>(SolrZooKeeper.java:41)
> at org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:53)
> at org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:132)
> at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:522)
> at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
> 2016-01-23 13:49:20.222 INFO ConnectionManager [main-EventThread] - Connected:false
> 2016-01-23 13:49:20.222 INFO ClientCnxn [main-EventThread] - EventThread shut down
> {code}



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