[
https://issues.apache.org/jira/browse/HBASE-20586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16541887#comment-16541887
]
Sean Busbey commented on HBASE-20586:
-------------------------------------
I'm not sure it's possible to get a unit test going for this, especially if
MiniKDC can't do it. If we do this as an integration test outside of maven that
manually runs two different MiniKDCs could we do it?
> SyncTable tool: Add support for cross-realm remote clusters
> -----------------------------------------------------------
>
> Key: HBASE-20586
> URL: https://issues.apache.org/jira/browse/HBASE-20586
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce, Replication
> Affects Versions: 1.2.0, 2.0.0
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Minor
> Attachments: HBASE-20586.master.001.patch
>
>
> One possible scenario for HashTable/SyncTable is for synchronize different
> clusters, for instance, when replication has been enabled but data existed
> already, or due replication issues that may had caused long lags in the
> replication.
> For secured clusters under different kerberos realms (with cross-realm
> properly set), though, current SyncTable version would fail to authenticate
> with the remote cluster when trying to read HashTable outputs (when
> *sourcehashdir* is remote) and also when trying to read table data on the
> remote cluster (when *sourcezkcluster* is remote).
> The hdfs error would look like this:
> {noformat}
> INFO mapreduce.Job: Task Id : attempt_1524358175778_105392_m_000000_0, Status
> : FAILED
> Error: java.io.IOException: Failed on local exception: java.io.IOException:
> org.apache.hadoop.security.AccessControlException: Client cannot authenticate
> via:[TOKEN, KERBEROS]; Host Details : local host is: "local-host/1.1.1.1";
> destination host is: "remote-nn":8020;
> at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:772)
> at org.apache.hadoop.ipc.Client.call(Client.java:1506)
> at org.apache.hadoop.ipc.Client.call(Client.java:1439)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230)
> at com.sun.proxy.$Proxy13.getBlockLocations(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getBlockLocations(ClientNamenodeProtocolTranslatorPB.java:256)
> ...
> at
> org.apache.hadoop.hbase.mapreduce.HashTable$TableHash.readPropertiesFile(HashTable.java:144)
> at
> org.apache.hadoop.hbase.mapreduce.HashTable$TableHash.read(HashTable.java:105)
> at
> org.apache.hadoop.hbase.mapreduce.SyncTable$SyncMapper.setup(SyncTable.java:188)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
> ...
> Caused by: java.io.IOException:
> org.apache.hadoop.security.AccessControlException: Client cannot authenticate
> via:[TOKEN, KERBEROS]{noformat}
> The above can be sorted if the SyncTable job acquires a DT for the remote NN.
> Once hdfs related authentication is done, it's also necessary to authenticate
> against remote HBase, as the below error would arise:
> {noformat}
> INFO mapreduce.Job: Task Id : attempt_1524358175778_172414_m_000000_0, Status
> : FAILED
> Error: org.apache.hadoop.hbase.client.RetriesExhaustedException: Can't get
> the location
> at
> org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.getRegionLocations(RpcRetryingCallerWithReadReplicas.java:326)
> ...
> at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:867)
> at
> org.apache.hadoop.hbase.mapreduce.SyncTable$SyncMapper.syncRange(SyncTable.java:331)
> ...
> Caused by: java.io.IOException: Could not set up IO Streams to
> remote-rs-host/1.1.1.2:60020
> at
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupIOstreams(RpcClientImpl.java:786)
> ...
> Caused by: java.lang.RuntimeException: SASL authentication failed. The most
> likely cause is missing or invalid credentials. Consider 'kinit'.
> ...
> Caused by: GSSException: No valid credentials provided (Mechanism level:
> Failed to find any Kerberos tgt)
> ...{noformat}
> The above would need additional authentication logic against the remote hbase
> cluster.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
