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[HDFS-6148] LeaseManager crashes while initiating block recovery - HDFS - [issue]
...While running branch-2.4, the LeaseManager crashed with an NPE. This does not always happen on block recovery.Exception in thread"org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@...
http://issues.apache.org/jira/browse/HDFS-6148    Author: Kihwal Lee, 2014-03-25, 17:58
[HDFS-5138] Support HDFS upgrade in HA - HDFS - [issue]
...With HA enabled, NN wo't start with "-upgrade". Since there has been a layout version change between 2.0.x and 2.1.x, starting NN in upgrade mode was necessary when deploying 2.1.x to an exi...
http://issues.apache.org/jira/browse/HDFS-5138    Author: Kihwal Lee, 2014-03-25, 14:03
[HDFS-3087] Decomissioning on NN restart can complete without blocks being replicated - HDFS - [issue]
...If a data node is added to the exclude list and the name node is restarted, the decomissioning happens right away on the data node registration. At this point the initial block report has no...
http://issues.apache.org/jira/browse/HDFS-3087    Author: Kihwal Lee, 2014-03-25, 14:03
[HDFS-6105] NN web UI for DN list loads the same jmx page multiple times. - HDFS - [issue]
...When loading "Datanodes" page of the NN web UI, the same jmx query is made multiple times. For a big cluster, that's a lot of data and overhead....
http://issues.apache.org/jira/browse/HDFS-6105    Author: Kihwal Lee, 2014-03-20, 15:00
[HDFS-6088] Add configurable maximum block count for datanode - HDFS - [issue]
...Currently datanode resources are protected by the free space check and the balancer.  But datanodes can run out of memory simply storing too many blocks. If the sizes of blocks are smal...
http://issues.apache.org/jira/browse/HDFS-6088    Author: Kihwal Lee, 2014-03-14, 20:59
[HDFS-5796] The file system browser in the namenode UI requires SPNEGO. - HDFS - [issue]
...After HDFS-5382, the browser makes webhdfs REST calls directly, requiring SPNEGO to work between user's browser and namenode.  This won't work if the cluster's security infrastructure i...
http://issues.apache.org/jira/browse/HDFS-5796    Author: Kihwal Lee, 2014-03-06, 15:09
Re: [VOTE] Merge HDFS-5535 Rolling Upgrade Improvement - HDFS - [mail # dev]
...+1 ...
   Author: Kihwal Lee, 2014-02-28, 03:03
[HDFS-6020] Fix the five findbugs warnings - HDFS - [issue]
...The latest build of the HDFS-5535 branch (rolling upgrades) shows five new findbugs warnings....
http://issues.apache.org/jira/browse/HDFS-6020    Author: Kihwal Lee, 2014-02-27, 00:57
[HDFS-5583] Make DN send an OOB Ack on shutdown before restarting - HDFS - [issue]
...Add an ability for data nodes to send an OOB response in order to indicate an upcoming upgrade-restart. Client should ignore the pipeline error from the node for a configured amount of time ...
http://issues.apache.org/jira/browse/HDFS-5583    Author: Kihwal Lee, 2014-02-25, 19:53
[HDFS-5924] Utilize OOB upgrade message processing for writes - HDFS - [issue]
...After HDFS-5585 and HDFS-5583, clients and datanodes can coordinate shutdown-restart in order to minimize failures or locality loss.In this jira, HDFS client is made aware of the restart OOB...
http://issues.apache.org/jira/browse/HDFS-5924    Author: Kihwal Lee, 2014-02-25, 19:29
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