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[HDFS-5080] BootstrapStandby not working with QJM when the existing NN is active - HDFS - [issue]
...Currently when QJM is used, running BootstrapStandby while the existing NN is active can get the following exception:FATAL ha.BootstrapStandby: Unable to read transaction ids 6175397-6175405...
http://issues.apache.org/jira/browse/HDFS-5080    Author: Jing Zhao, 2013-11-05, 20:01
[HDFS-4052] BlockManager#invalidateWork should print logs outside the lock - HDFS - [issue]
...Info level log information printed holding the lock is long and is printed by traversing a list/array. It would be better to move it outside of the lock....
http://issues.apache.org/jira/browse/HDFS-4052    Author: Jing Zhao, 2013-10-31, 18:02
[HDFS-5384] Add a new TransitionState to indicate NN is in transition from standby state to active state - HDFS - [issue]
...Currently in HA setup, when a NameNode is transitioning from standby to active, the current code first sets the state of the NN to Active, then starts the active service, during which the NN...
http://issues.apache.org/jira/browse/HDFS-5384    Author: Jing Zhao, 2013-10-21, 22:29
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
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