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https://issues.apache.org/jira/browse/HDFS-7073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14141934#comment-14141934
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Hudson commented on HDFS-7073:
------------------------------
SUCCESS: Integrated in Hadoop-Yarn-trunk #686 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/686/])
HDFS-7073. Allow falling back to a non-SASL connection on DataTransferProtocol
in several edge cases. Contributed by Chris Nauroth. (cnauroth: rev
f85cc14eb49a46e81d2edcdc1ffe4d0852f193a5)
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DNConf.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/sasl/SaslDataTransferClient.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestRetryCacheWithHA.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/WritableRpcEngine.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufRpcEngine.java
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRPC.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/HAUtil.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/ConfiguredFailoverProxyProvider.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/NameNodeProxies.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcEngine.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/sasl/SaslDataTransferServer.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/protocol/datatransfer/sasl/TestSaslDataTransfer.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
> Allow falling back to a non-SASL connection on DataTransferProtocol in
> several edge cases.
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-7073
> URL: https://issues.apache.org/jira/browse/HDFS-7073
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, hdfs-client, security
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Fix For: 2.6.0
>
> Attachments: HDFS-7073.1.patch, HDFS-7073.2.patch, HDFS-7073.3.patch
>
>
> HDFS-2856 implemented general SASL support on DataTransferProtocol. Part of
> that work also included a fallback mode in case the remote cluster is running
> under a different configuration without SASL. I've discovered a few edge
> case configurations that this did not support:
> * Cluster is unsecured, but has block access tokens enabled. This is not
> something I've seen done in practice, but I've heard historically it has been
> allowed. The HDFS-2856 code relied on seeing an empty block access token to
> trigger fallback, and this doesn't work if the unsecured cluster actually is
> using block access tokens.
> * The DataNode has an unpublicized testing configuration property that could
> be used to skip the privileged port check. However, the HDFS-2856 code is
> still enforcing requirement of SASL when the ports are not privileged, so
> this would force existing configurations to make changes to activate SASL.
> This patch will restore the old behavior so that these edge case
> configurations will continue to work the same way.
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