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### _Why are the changes needed?_
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1. If you add a feature, you can talk about the use case of it.
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**ROOT CAUSE**
When server receive request of close session, will call `FrontendService#CloseSession`. When an error is encountered when closing the session, `CURRENT_SERVER_CONTEXT` will never be called.
```
2021-08-02 09:41:50.945 INFO service.FrontendService: Received request of closing SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72]
2021-08-02 09:41:50.946 INFO session.KyuubiSessionManager: SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72] is closed, current opening sessions 0
2021-08-02 09:41:50.949 WARN service.FrontendService: Error closing session:
org.apache.kyuubi.KyuubiSQLException: Error while cleaning up the engine resources
at org.apache.kyuubi.KyuubiSQLException$.apply(KyuubiSQLException.scala:68)
at org.apache.kyuubi.session.KyuubiSessionImpl.close(KyuubiSessionImpl.scala:89)
at org.apache.kyuubi.session.SessionManager.closeSession(SessionManager.scala:74)
at org.apache.kyuubi.service.AbstractBackendService.closeSession(AbstractBackendService.scala:49)
at org.apache.kyuubi.service.FrontendService.CloseSession(FrontendService.scala:218)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$CloseSession.getResult(TCLIService.java:1397)
at org.apache.hive.service.rpc.thrift.TCLIService$Processor$CloseSession.getResult(TCLIService.java:1382)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at org.apache.kyuubi.service.authentication.TSetIpAddressProcessor.process(TSetIpAddressProcessor.scala:36)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.thrift.transport.TTransportException
at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:132)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:86)
at org.apache.thrift.transport.TSaslTransport.readLength(TSaslTransport.java:376)
at org.apache.thrift.transport.TSaslTransport.readFrame(TSaslTransport.java:453)
at org.apache.thrift.transport.TSaslTransport.read(TSaslTransport.java:435)
at org.apache.thrift.transport.TSaslClientTransport.read(TSaslClientTransport.java:37)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:86)
at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:429)
at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:318)
at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:219)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:77)
at org.apache.hive.service.rpc.thrift.TCLIService$Client.recv_CloseSession(TCLIService.java:191)
at org.apache.hive.service.rpc.thrift.TCLIService$Client.CloseSession(TCLIService.java:178)
at org.apache.kyuubi.client.KyuubiSyncThriftClient.$anonfun$closeSession$1(KyuubiSyncThriftClient.scala:67)
at org.apache.kyuubi.client.KyuubiSyncThriftClient.withLockAcquired(KyuubiSyncThriftClient.scala:47)
at org.apache.kyuubi.client.KyuubiSyncThriftClient.closeSession(KyuubiSyncThriftClient.scala:67)
at org.apache.kyuubi.session.KyuubiSessionImpl.close(KyuubiSessionImpl.scala:86)
... 12 more
2021-08-02 09:41:50.953 INFO service.FrontendService: Finished closing SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72]
2021-08-02 09:41:50.957 INFO service.FrontendService: Session [SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72]] disconnected without closing properly, close it now
2021-08-02 09:41:50.963 INFO service.FrontendService: Session [SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72]] disconnected without closing properly, close it now
2021-08-02 09:41:50.964 WARN service.FrontendService: Failed closing session
org.apache.kyuubi.KyuubiSQLException: Invalid SessionHandle [f3545c54-2e94-4090-aaa6-4397e653bb72]
at org.apache.kyuubi.KyuubiSQLException$.apply(KyuubiSQLException.scala:68)
at org.apache.kyuubi.session.SessionManager.closeSession(SessionManager.scala:71)
at org.apache.kyuubi.service.AbstractBackendService.closeSession(AbstractBackendService.scala:49)
at org.apache.kyuubi.service.FrontendService$FeTServerEventHandler.deleteContext(FrontendService.scala:529)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:300)
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)
2021-08-02 09:42:30.908 INFO server.ZooKeeperServer: Expiring session 0x1000da7829f0002, timeout of 60000ms exceeded
2021-08-02 09:42:30.909 INFO server.PrepRequestProcessor: Processed session termination for sessionid: 0x1000da7829f0002
```
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request
Closes#879 from timothy65535/ky-821.
Closes#821
f485f580 [timothy65535] [KYUUBI #821] Improper exception for closing a non-existent session
Authored-by: timothy65535 <timothy65535@163.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
4b4cfa6ff6