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https://issues.apache.org/jira/browse/HBASE-20993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16624426#comment-16624426
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Reid Chan commented on HBASE-20993:
-----------------------------------

Ok to revert, thanks for report.

> [Auth] IPC client fallback to simple auth allowed doesn't work
> --------------------------------------------------------------
>
>                 Key: HBASE-20993
>                 URL: https://issues.apache.org/jira/browse/HBASE-20993
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, IPC/RPC, security
>    Affects Versions: 1.2.6, 1.3.2, 1.2.7, 1.4.7
>            Reporter: Reid Chan
>            Assignee: Jack Bearden
>            Priority: Critical
>             Fix For: 1.5.0, 1.4.8
>
>         Attachments: HBASE-20993.001.patch, 
> HBASE-20993.003.branch-1.flowchart.png, HBASE-20993.branch-1.002.patch, 
> HBASE-20993.branch-1.003.patch, HBASE-20993.branch-1.004.patch, 
> HBASE-20993.branch-1.005.patch, HBASE-20993.branch-1.006.patch, 
> HBASE-20993.branch-1.007.patch, HBASE-20993.branch-1.008.patch, 
> HBASE-20993.branch-1.009.patch, HBASE-20993.branch-1.009.patch, 
> HBASE-20993.branch-1.2.001.patch, HBASE-20993.branch-1.wip.002.patch, 
> HBASE-20993.branch-1.wip.patch, yetus-local-testpatch-output-009.txt
>
>
> It is easily reproducible.
> client's hbase-site.xml: hadoop.security.authentication:kerberos, 
> hbase.security.authentication:kerberos, 
> hbase.ipc.client.fallback-to-simple-auth-allowed:true, keytab and principal 
> are right set
> A simple auth hbase cluster, a kerberized hbase client application. 
> application trying to r/w/c/d table will have following exception:
> {code}
> javax.security.sasl.SaslException: GSS initiate failed [Caused by 
> GSSException: No valid credentials provided (Mechanism level: Failed to find 
> any Kerberos tgt)]
>       at 
> com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:211)
>       at 
> org.apache.hadoop.hbase.security.HBaseSaslRpcClient.saslConnect(HBaseSaslRpcClient.java:179)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupSaslConnection(RpcClientImpl.java:617)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.access$700(RpcClientImpl.java:162)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection$2.run(RpcClientImpl.java:743)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection$2.run(RpcClientImpl.java:740)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:422)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupIOstreams(RpcClientImpl.java:740)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.writeRequest(RpcClientImpl.java:906)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.tracedWriteRequest(RpcClientImpl.java:873)
>       at 
> org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1241)
>       at 
> org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:227)
>       at 
> org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:336)
>       at 
> org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$BlockingStub.isMasterRunning(MasterProtos.java:58383)
>       at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$MasterServiceStubMaker.isMasterRunning(ConnectionManager.java:1592)
>       at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStubNoRetries(ConnectionManager.java:1530)
>       at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStub(ConnectionManager.java:1552)
>       at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$MasterServiceStubMaker.makeStub(ConnectionManager.java:1581)
>       at 
> org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getKeepAliveMasterService(ConnectionManager.java:1738)
>       at 
> org.apache.hadoop.hbase.client.MasterCallable.prepare(MasterCallable.java:38)
>       at 
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:134)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:4297)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:4289)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.createTableAsyncV2(HBaseAdmin.java:753)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:674)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:607)
>       at 
> org.playground.hbase.KerberizedClientFallback.main(KerberizedClientFallback.java:55)
> Caused by: GSSException: No valid credentials provided (Mechanism level: 
> Failed to find any Kerberos tgt)
>       at 
> sun.security.jgss.krb5.Krb5InitCredential.getInstance(Krb5InitCredential.java:147)
>       at 
> sun.security.jgss.krb5.Krb5MechFactory.getCredentialElement(Krb5MechFactory.java:122)
>       at 
> sun.security.jgss.krb5.Krb5MechFactory.getMechanismContext(Krb5MechFactory.java:187)
>       at 
> sun.security.jgss.GSSManagerImpl.getMechanismContext(GSSManagerImpl.java:224)
>       at 
> sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:212)
>       at 
> sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:179)
>       at 
> com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:192)
> {code}



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