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https://issues.apache.org/jira/browse/HBASE-27908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729358#comment-17729358
 ] 

Rushabh Shah commented on HBASE-27908:
--------------------------------------

[~ibrar1761] JIRA is not a forum to seek help regarding configuration issues or 
dev setup. Please send an email to d...@hbase.apache.org
 or u...@hbase.apache.org and hopefully someone will reply there. I am closing 
this bug as INVALID.

> Can't get connection to ZooKeeper
> ---------------------------------
>
>                 Key: HBASE-27908
>                 URL: https://issues.apache.org/jira/browse/HBASE-27908
>             Project: HBase
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 1.4.13
>            Reporter: Ibrar Ahmed
>            Priority: Major
>
> I am using Hbase cluster along with apache kylin, the connection between Edge 
> node and the Hbase cluster is good.
> following are the logs from Kylin side which shows Error exception:
> {code:java}
> java.net.SocketTimeoutException: callTimeout=1200000, callDuration=1275361: 
> org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to 
> ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase 
>     at 
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:178)
>     at 
> org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:4551)
>     at 
> org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:561)
>     at 
> org.apache.hadoop.hbase.client.HTable.getTableDescriptor(HTable.java:585)
>     at 
> org.apache.kylin.storage.hbase.steps.HFileOutputFormat3.configureIncrementalLoad(HFileOutputFormat3.java:328)
>     at 
> org.apache.kylin.storage.hbase.steps.CubeHFileJob.run(CubeHFileJob.java:101)
>     at 
> org.apache.kylin.engine.mr.common.MapReduceExecutable.doWork(MapReduceExecutable.java:144)
>     at 
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:179)
>     at 
> org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:71)
>     at 
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:179)
>     at 
> org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:114)
>     at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>     at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>     at java.lang.Thread.run(Thread.java:750)
> Caused by: org.apache.hadoop.hbase.MasterNotRunningException: 
> org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to 
> ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStub(ConnectionManager.java:1618)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$MasterServiceStubMaker.makeStub(ConnectionManager.java:1638)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getKeepAliveMasterService(ConnectionManager.java:1795)
>     at 
> org.apache.hadoop.hbase.client.MasterCallable.prepare(MasterCallable.java:38)
>     at 
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:140)
>     ... 13 more
> Caused by: org.apache.hadoop.hbase.MasterNotRunningException: Can't get 
> connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.checkIfBaseNodeAvailable(ConnectionManager.java:971)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.access$400(ConnectionManager.java:566)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStubNoRetries(ConnectionManager.java:1567)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStub(ConnectionManager.java:1609)
>     ... 17 more
> Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: 
> KeeperErrorCode = ConnectionLoss for /hbase
>     at org.apache.zookeeper.KeeperException.create(KeeperException.java:102)
>     at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
>     at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1111)
>     at 
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:220)
>     at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:425)
>     at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.checkIfBaseNodeAvailable(ConnectionManager.java:960)
>     ... 20 more {code}
> Following are the logs from Hbase cluster master NOde which accepts the 
> connection from Edge NOde(Kylin):
> {code:java}
> 2023-06-05 10:00:30,336 [myid:0] - INFO 
> [CommitProcessor:0:NIOServerCnxn@1056] - Closed socket connection for client 
> /10.127.2.201:37328 which had sessionid 0x7311c000c
> 2023-06-05 13:14:48,346 [myid:0] - INFO 
> [PurgeTask:DatadirCleanupManager$PurgeTask@138] - Purge task started.
> 2023-06-05 13:14:48,346 [myid:0] - INFO 
> [PurgeTask:DatadirCleanupManager$PurgeTask@144] - Purge task completed.
> 2023-06-05 13:22:39,872 [myid:0] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@222] - 
> Accepted socket connection from /10.127.2.233:42364
> 2023-06-05 13:22:39,873 [myid:0] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@949] - Client 
> attempting to establish new session at /10.127.2.233:42364
> 2023-06-05 13:22:39,874 [myid:0] - INFO 
> [CommitProcessor:0:ZooKeeperServer@694] - Established session 0x7311c0022 
> with negotiated timeout 40000 for client /10.127.2.233:42364 {code}
> have check all the permission in HDFS and S3. Any leads would be really 
> appreciated.



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