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[HDFS-6360] MiniDFSCluster can cause unexpected side effects due to sharing of config - HDFS - [issue]
...As noted in HDFS-6329 and HDFS-5522, certain use cases of MiniDFSCluster can result in unexpected results and falsely failing or passing unit tests.Since a Configuration object is shared for...
http://issues.apache.org/jira/browse/HDFS-6360    Author: Kihwal Lee, 2014-05-16, 02:36
[HDFS-6384] Provide an alternative offline file system analysis tool - HDFS - [issue]
...Per discussion in HDFS-6293, we need an alternative way of analyzing file system offline.  Some use cases can be covered by post-processing the new PB-based fsimage without consuming mu...
http://issues.apache.org/jira/browse/HDFS-6384    Author: Kihwal Lee, 2014-05-13, 17:01
[HDFS-5983] TestSafeMode#testInitializeReplQueuesEarly fails - HDFS - [issue]
...It was seen from one of the precommit build of HDFS-5962.  The test case creates 15 blocks and then shuts down all datanodes. Then the namenode is restarted with a low safe block thresh...
http://issues.apache.org/jira/browse/HDFS-5983    Author: Kihwal Lee, 2014-04-09, 20:32
[HDFS-4861] BlockPlacementPolicyDefault does not consider decommissioning racks - HDFS - [issue]
...getMaxNodesPerRack() calculates the max replicas/rack like this:int maxNodesPerRack = (totalNumOfReplicas-1)/clusterMap.getNumOfRacks()+2;Since this does not consider the racks that are bein...
http://issues.apache.org/jira/browse/HDFS-4861    Author: Kihwal Lee, 2014-04-05, 03:17
[HDFS-5870] The legacy local reader stops working on block token expiration - HDFS - [issue]
...HDFS-5637 fixed the issue for 2.0, but after the new domain socket based local reader, the fix won't work for the old "legacy" short-circuit local reader. This is because DFSInputStream#getB...
http://issues.apache.org/jira/browse/HDFS-5870    Author: Kihwal Lee, 2014-04-03, 22:43
[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-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
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-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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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB