[
https://issues.apache.org/jira/browse/HIVE-6050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13851276#comment-13851276
]
Szehon Ho commented on HIVE-6050:
---------------------------------
As another note, the issue also exists for the other way (connecting Hive 0.10
driver with Hive 0.13 server).
Exception is almost same, except this time client complains about the
serverProtocolVersion.
{noformat}
"Could not establish connection to jdbc:hive2://localhost:10000: Required field
'serverProtocolVersion' is unset!
Struct:TOpenSessionResp(status:TStatus(statusCode:SUCCESS_STATUS),
serverProtocolVersion:null,
sessionHandle:TSessionHandle(sessionId:THandleIdentifier(guid:29 3C D5 F4 B0 DB
49 48 86 0D 16 2B 42 D5 76 49, secret:B5 33 C6 D3 4B CF 4E 58 AE 0B DD DC 7F 71
AD AD)), configuration:{})" type="java.sql.SQLException">java.sql.SQLException:
Could not establish connection to jdbc:hive2://localhost:10000: Required field
'serverProtocolVersion' is unset!
Struct:TOpenSessionResp(status:TStatus(statusCode:SUCCESS_STATUS),
serverProtocolVersion:null,
sessionHandle:TSessionHandle(sessionId:THandleIdentifier(guid:29 3C D5 F4 B0 DB
49 48 86 0D 16 2B 42 D5 76 49, secret:B5 33 C6 D3 4B CF 4E 58 AE 0B DD DC 7F 71
AD AD)), configuration:{})
at
org.apache.hive.jdbc.HiveConnection.openSession(HiveConnection.java:262)
at
org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:133)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:106)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at
org.apache.hive.jdbc.MyTestJdbcDriver2.getConnection(MyTestJdbcDriver2.java:73)
at
org.apache.hive.jdbc.MyTestJdbcDriver2.<init>(MyTestJdbcDriver2.java:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:187)
at
org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:236)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:233)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:523)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1063)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:914)
Caused by: org.apache.thrift.protocol.TProtocolException: Required field
'serverProtocolVersion' is unset!
Struct:TOpenSessionResp(status:TStatus(statusCode:SUCCESS_STATUS),
serverProtocolVersion:null,
sessionHandle:TSessionHandle(sessionId:THandleIdentifier(guid:29 3C D5 F4 B0 DB
49 48 86 0D 16 2B 42 D5 76 49, secret:B5 33 C6 D3 4B CF 4E 58 AE 0B DD DC 7F 71
AD AD)), configuration:{})
at
org.apache.hive.service.cli.thrift.TOpenSessionResp.validate(TOpenSessionResp.java:578)
at
org.apache.hive.service.cli.thrift.TOpenSessionResp$TOpenSessionRespStandardScheme.read(TOpenSessionResp.java:676)
at
org.apache.hive.service.cli.thrift.TOpenSessionResp$TOpenSessionRespStandardScheme.read(TOpenSessionResp.java:612)
at
org.apache.hive.service.cli.thrift.TOpenSessionResp.read(TOpenSessionResp.java:520)
at
org.apache.hive.service.cli.thrift.TCLIService$OpenSession_result$OpenSession_resultStandardScheme.read(TCLIService.java:2361)
at
org.apache.hive.service.cli.thrift.TCLIService$OpenSession_result$OpenSession_resultStandardScheme.read(TCLIService.java:2346)
at
org.apache.hive.service.cli.thrift.TCLIService$OpenSession_result.read(TCLIService.java:2293)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.hive.service.cli.thrift.TCLIService$Client.recv_OpenSession(TCLIService.java:160)
at
org.apache.hive.service.cli.thrift.TCLIService$Client.OpenSession(TCLIService.java:147)
at
org.apache.hive.jdbc.HiveConnection.openSession(HiveConnection.java:254)
... 26 more
{noformat}
> JDBC backward compatibility is broken
> -------------------------------------
>
> Key: HIVE-6050
> URL: https://issues.apache.org/jira/browse/HIVE-6050
> Project: Hive
> Issue Type: Bug
> Components: JDBC
> Reporter: Szehon Ho
>
> Connect from JDBC driver of Hive 0.13 (TProtocolVersion=v4) to HiveServer2 of
> Hive 0.10 (TProtocolVersion=v1), will return the following exception:
> {noformat}
> java.sql.SQLException: Could not establish connection to
> jdbc:hive2://localhost:10000/default: Required field 'client_protocol' is
> unset! Struct:TOpenSessionReq(client_protocol:null)
> at
> org.apache.hive.jdbc.HiveConnection.openSession(HiveConnection.java:336)
> at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:158)
> at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:105)
> at java.sql.DriverManager.getConnection(DriverManager.java:571)
> at java.sql.DriverManager.getConnection(DriverManager.java:187)
> at
> com.cloudera.itest.hiveserver.UnmanagedHiveServer.createConnection(UnmanagedHiveServer.java:73)
> at
> com.cloudera.itest.AbstractTestWithStaticConfiguration.createConnection(AbstractTestWithStaticConfiguration.java:68)
> at com.cloudera.itest.FirstTest.sanityConnectionTest(FirstTest.java:19)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:77)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> Caused by: org.apache.thrift.TApplicationException: Required field
> 'client_protocol' is unset! Struct:TOpenSessionReq(client_protocol:null)
> at
> org.apache.thrift.TApplicationException.read(TApplicationException.java:108)
> at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:71)
> at
> org.apache.hive.service.cli.thrift.TCLIService$Client.recv_OpenSession(TCLIService.java:160)
> at
> org.apache.hive.service.cli.thrift.TCLIService$Client.OpenSession(TCLIService.java:147)
> at
> org.apache.hive.jdbc.HiveConnection.openSession(HiveConnection.java:327)
> ... 37 more
> {noformat}
> On code analysis, it looks like the 'client_protocol' scheme is a ThriftEnum,
> which doesn't seem to be backward-compatible. Look at the code path in the
> generated file 'TOpenSessionReq.java', method
> TOpenSessionReqStandardScheme.read():
> 1. The method will call 'TProtocolVersion.findValue()' on the thrift
> protocol's byte stream, which returns null if the client is sending an enum
> value unknown to the server. (v4 is unknown to server)
> 2. The method will then call struct.validate(), which will throw the above
> exception because of null version.
> So doesn't look like the current backward-compatibility scheme will work.
--
This message was sent by Atlassian JIRA
(v6.1.4#6159)
