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Posts: 11
Registered: ‎06-09-2016

Solr : The Cloudera Manager Agent is not able to communicate with this role's web server.

Hi

 

It is a 3 node cluster. TLS and Kerberos is enabled. TLS is enabled with self signed certificates. Everything thing except Solr is working in cluster.

 

in solr logs error , I notice following error

 

2016-06-09 16:37:06,944 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server ussltc9129v.dev.sltc.com/10.25.42.129:2181. Will not attempt to authenticate using SASL (unknown error)
2016-06-09 16:37:06,944 INFO org.apache.zookeeper.ClientCnxn: Socket connection established, initiating session, client: /10.25.42.129:30307, server: ussltc9129v.dev.sltc.com/10.25.42.129:2181
2016-06-09 16:37:06,946 INFO org.apache.zookeeper.ClientCnxn: Session establishment complete on server ussltc9129v.dev.sltc.com/10.25.42.129:2181, sessionid = 0x15536eb03610078, negotiated timeout = 30000
2016-06-09 16:37:06,946 INFO org.apache.solr.common.cloud.ConnectionManager: Watcher org.apache.solr.common.cloud.ConnectionManager@50d7dcac name:ZooKeeperConnection Watcher:ussltc9129v.dev.sltc.com:2181/solr got event WatchedEvent state:SyncConnected type:None path:null path:null type:None
2016-06-09 16:37:06,946 INFO org.apache.solr.common.cloud.ConnectionManager: Client is connected to ZooKeeper
2016-06-09 16:37:06,975 INFO org.apache.solr.cloud.ZkController: Register node as live in ZooKeeper:/live_nodes/ussltc9129v.dev.sltc.com:8983_solr
2016-06-09 16:37:06,977 INFO org.apache.solr.common.cloud.SolrZkClient: makePath: /live_nodes/ussltc9129v.dev.sltc.com:8983_solr
2016-06-09 16:37:06,979 ERROR org.apache.solr.cloud.ZkController:
org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode = NoAuth for /live_nodes/ussltc9129v.dev.sltc.com:8983_solr
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:113)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
        at org.apache.solr.common.cloud.SolrZkClient$10.execute(SolrZkClient.java:505)
        at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:61)
        at org.apache.solr.common.cloud.SolrZkClient.makePath(SolrZkClient.java:502)

 

 

I am not sure about reason of error. It seems to be somehow it is not able to authenticate.

a) I have regenerated Kerberos principals for all the servers.

b) I have also uninstalled Solr and then installed it again.

 

But this error remains still. Request help if someone can guide me , how to resolve it.

 

Thanks and Regards

Aniruddh

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