badbye commented on issue #3409:
URL: https://github.com/apache/kyuubi/issues/3409#issuecomment-1486180297

   After fixing the connection between the zookeeper and Adb Spark, I got a 
`connect timeout error` on the client side:
   ```
   2023-03-28 11:47:11.728 INFO 
org.apache.kyuubi.ha.client.zookeeper.ZookeeperDiscoveryClient: Get service 
instance:21.25.1.59:45625 and version:Some(1.6.1-incubating) under 
/kyuubi_1.6.1-incubating_USER_SPARK_SQL/test/default
   2023-03-28 11:47:11.768 ERROR org.apache.kyuubi.session.KyuubiSessionImpl: 
Opening engine 
[kyuubi_USER_SPARK_SQL_test_default_32adf216-e872-48a9-a87e-6789ef2d4a4c 
21.25.1.59:45625] for test session failed
   org.apache.thrift.transport.TTransportException: 
java.net.SocketTimeoutException: connect timed out
        at org.apache.thrift.transport.TSocket.open(TSocket.java:226) 
~[libthrift-0.9.3.jar:0.9.3]
        at 
org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:266) 
~[libthrift-0.9.3.jar:0.9.3]
        at 
org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
 ~[libthrift-0.9.3.jar:0.9.3]
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createTProtocol(KyuubiSyncThriftClient.scala:455)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createClient(KyuubiSyncThriftClient.scala:471)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1(KyuubiSessionImpl.scala:128)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1$adapted(KyuubiSessionImpl.scala:113)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.ha.client.DiscoveryClientProvider$.withDiscoveryClient(DiscoveryClientProvider.scala:36)
 ~[kyuubi-ha_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.openEngineSession(KyuubiSessionImpl.scala:113)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
org.apache.kyuubi.operation.LaunchEngine.$anonfun$runInternal$2(LaunchEngine.scala:49)
 ~[kyuubi-server_2.12-1.6.1-incubating.jar:1.6.1-incubating]
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
~[?:1.8.0_271]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
~[?:1.8.0_271]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
~[?:1.8.0_271]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
~[?:1.8.0_271]
        at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_271]
   Caused by: java.net.SocketTimeoutException: connect timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_271]
        at 
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476) 
~[?:1.8.0_271]
        at 
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
 ~[?:1.8.0_271]
        at 
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200) 
~[?:1.8.0_271]
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) 
~[?:1.8.0_271]
        at java.net.Socket.connect(Socket.java:606) ~[?:1.8.0_271]
        at org.apache.thrift.transport.TSocket.open(TSocket.java:221) 
~[libthrift-0.9.3.jar:0.9.3]
        ... 14 more
   2023-03-28 11:47:11.774 INFO 
org.apache.curator.framework.imps.CuratorFrameworkImpl: 
backgroundOperationsLoop exiting
   2023-03-28 11:47:11.777 INFO org.apache.zookeeper.ZooKeeper: Session: 
0x10926b572df0001 closed
   2023-03-28 11:47:11.777 INFO org.apache.zookeeper.ClientCnxn: EventThread 
shut down for session: 0x10926b572df0001
   2023-03-28 11:47:11.789 INFO org.apache.kyuubi.operation.LaunchEngine: 
Processing test's query[19ab56d1-a2eb-429e-a858-6d96b0ffdbbb]: RUNNING_STATE -> 
ERROR_STATE, time taken: 60.261 seconds
   Error: org.apache.kyuubi.KyuubiSQLException: Error operating LaunchEngine: 
org.apache.thrift.transport.TTransportException: 
java.net.SocketTimeoutException: connect timed out
        at org.apache.thrift.transport.TSocket.open(TSocket.java:226)
        at 
org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:266)
        at 
org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createTProtocol(KyuubiSyncThriftClient.scala:455)
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createClient(KyuubiSyncThriftClient.scala:471)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1(KyuubiSessionImpl.scala:128)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1$adapted(KyuubiSessionImpl.scala:113)
        at 
org.apache.kyuubi.ha.client.DiscoveryClientProvider$.withDiscoveryClient(DiscoveryClientProvider.scala:36)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.openEngineSession(KyuubiSessionImpl.scala:113)
        at 
org.apache.kyuubi.operation.LaunchEngine.$anonfun$runInternal$2(LaunchEngine.scala:49)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        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:748)
   Caused by: java.net.SocketTimeoutException: connect timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at 
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
        at 
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
        at 
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
        at java.net.Socket.connect(Socket.java:606)
        at org.apache.thrift.transport.TSocket.open(TSocket.java:221)
        ... 14 more
   
        at 
org.apache.kyuubi.KyuubiSQLException$.apply(KyuubiSQLException.scala:69)
        at 
org.apache.kyuubi.operation.KyuubiOperation$$anonfun$onError$1.applyOrElse(KyuubiOperation.scala:75)
        at 
org.apache.kyuubi.operation.KyuubiOperation$$anonfun$onError$1.applyOrElse(KyuubiOperation.scala:56)
        at 
scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:38)
        at 
org.apache.kyuubi.operation.LaunchEngine.$anonfun$runInternal$2(LaunchEngine.scala:51)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   Caused by: org.apache.thrift.transport.TTransportException: 
java.net.SocketTimeoutException: connect timed out
        at org.apache.thrift.transport.TSocket.open(TSocket.java:226)
        at 
org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:266)
        at 
org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createTProtocol(KyuubiSyncThriftClient.scala:455)
        at 
org.apache.kyuubi.client.KyuubiSyncThriftClient$.createClient(KyuubiSyncThriftClient.scala:471)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1(KyuubiSessionImpl.scala:128)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.$anonfun$openEngineSession$1$adapted(KyuubiSessionImpl.scala:113)
        at 
org.apache.kyuubi.ha.client.DiscoveryClientProvider$.withDiscoveryClient(DiscoveryClientProvider.scala:36)
        at 
org.apache.kyuubi.session.KyuubiSessionImpl.openEngineSession(KyuubiSessionImpl.scala:113)
        at 
org.apache.kyuubi.operation.LaunchEngine.$anonfun$runInternal$2(LaunchEngine.scala:49)
        ... 5 more
   Caused by: java.net.SocketTimeoutException: connect timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at 
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
        at 
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
        at 
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
        at java.net.Socket.connect(Socket.java:606)
        at org.apache.thrift.transport.TSocket.open(TSocket.java:221)
        ... 14 more (state=,code=0)
   Beeline version 1.6.1-incubating by Apache Kyuubi (Incubating)
   ```
   
   any ideas to fix it? @pan3793 
   
   ```
   kyuubi.session.engine.login.timeout = 30
   kyuubi.session.engine.alive.probe.interval = 30
   kyuubi.session.engine.alive.timeout = 120
   kyuubi.session.engine.alive.probe.enabled = true
   ```


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