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Re: high availability - HDFS - [mail # user]
...I think a real fencing is not required in case that you're using QJM-based HA. If you are using ZKFC, a graceful fencing will first be triggered in which ZKFC will send a RPC request to the ...
   Author: Jing Zhao, 2013-10-15, 20:59
[HDFS-5327] Rename StandbyException to FailoverException - HDFS - [issue]
...After HDFS-5291, client's RPC level can determine whether to retry the same server or failover to another server based on the two types of exception: The new introduced RetriableException in...
http://issues.apache.org/jira/browse/HDFS-5327    Author: Jing Zhao, 2013-10-08, 23:41
[HDFS-5137] Improve WriteManager for processing stable write requests and commit requests - HDFS - [issue]
...WriteManager#handleCommit needs to block until all the data before the commitOffset has been received. This jira plans to improve the current concurrency implementation for this blocking cal...
http://issues.apache.org/jira/browse/HDFS-5137    Author: Jing Zhao, 2013-10-02, 00:49
[HDFS-5217] Namenode log directory link is inaccessible in secure cluster - HDFS - [issue]
...Currently in a secured HDFS cluster, 401 error is returned when clicking the "NameNode Logs" link.Looks like the cause of the issue is that the httpServer does not correctly set the security...
http://issues.apache.org/jira/browse/HDFS-5217    Author: Jing Zhao, 2013-09-26, 01:15
[HDFS-5212] Refactor RpcMessage and NFS3Response to support different types of authentication information - HDFS - [issue]
...Currently the authentication information is hard coded in RpcMessage (and its subclasses) and NFS3Response (and its subclasses) as AuthFlavor value and empty byte array. We need to refactor ...
http://issues.apache.org/jira/browse/HDFS-5212    Author: Jing Zhao, 2013-09-25, 00:33
[HDFS-5045] Add more unit tests for retry cache to cover all AtMostOnce methods - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-5045    Author: Jing Zhao, 2013-09-25, 00:33
[HDFS-4971] Move IO operations out of locking in OpenFileCtx - HDFS - [issue]
...Currently some IO operations (such as writing data to HDFS and dumping to local disk) in OpenFileCtx may hold a lock which can block processing incoming writing requests. This jira aims to o...
http://issues.apache.org/jira/browse/HDFS-4971    Author: Jing Zhao, 2013-09-24, 14:29
[HDFS-4096] Add snapshot information to namenode WebUI - HDFS - [issue]
...Add snapshot information to namenode WebUI....
http://issues.apache.org/jira/browse/HDFS-4096    Author: Jing Zhao, 2013-09-14, 14:42
[HDFS-5192] NameNode may fail to start when dfs.client.test.drop.namenode.response.number is set - HDFS - [issue]
...In HDFS-5118 we add a new configuration property "dfs.client.test.drop.namenode.response.number" for DFSClient, which controls if DFSClient drops RPC responses for testing purpose. Currently...
http://issues.apache.org/jira/browse/HDFS-5192    Author: Jing Zhao, 2013-09-13, 15:35
[HDFS-5038] Backport several branch-2 APIs to branch-1 - HDFS - [issue]
...Backport the following several simple API to branch-1:1. FileSystem#newInstance(Configuration)2. DFSClient#getNamenode()3. FileStatus#isDirectory()...
http://issues.apache.org/jira/browse/HDFS-5038    Author: Jing Zhao, 2013-09-11, 22:33
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