Keith Laban created SOLR-8599:
---------------------------------
Summary: Errors in construction of SolrZooKeeper cause Solr to
into inconsistent state
Key: SOLR-8599
URL: https://issues.apache.org/jira/browse/SOLR-8599
Project: Solr
Issue Type: Bug
Components: SolrCloud
Reporter: Keith Laban
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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