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[HDFS-7412] Move RetryCache to NameNodeRpcServer - HDFS - [issue]
...The concept of RetryCache belongs to the RPC layer.It would be nice to separate it from the implementation of FSNameSystem....
http://issues.apache.org/jira/browse/HDFS-7412    Author: Haohui Mai, 2014-11-21, 15:52
[HDFS-7415] Move FSNameSystem.resolvePath() to FSDirectory - HDFS - [issue]
...It would be nice to move resolvePath() to FSDirectory as the concept belongs to FSDirectory and it is a simple wrapper for the calls in FSDirectory....
http://issues.apache.org/jira/browse/HDFS-7415    Author: Haohui Mai, 2014-11-21, 15:44
[HDFS-7413] Some unit tests should use NameNodeProtocols instead of FSNameSystem - HDFS - [issue]
...HDFS-7412 proposes to changes some of the method signatures in FSNameSystem. This jira fixes the unit tests affected by the changes. Particularly, these unit tests can use NameNodeProtocols ...
http://issues.apache.org/jira/browse/HDFS-7413    Author: Haohui Mai, 2014-11-21, 15:44
[HDFS-7420] Delegate permission checks to FSDirectory - HDFS - [issue]
...Many permission checks are in fact related to FSDirectory instead of FSNameSystem. It would be nice to move them to FSDirectory to reduce the effort of moving other functions from FSNameSyst...
http://issues.apache.org/jira/browse/HDFS-7420    Author: Haohui Mai, 2014-11-21, 14:27
[HDFS-7416] Revisit the abstraction between NameNodeRpcServer, FSNameSystem and FSDirectory - HDFS - [issue]
...NameNodeRpcServer, FSNameSystem and FSDirectory implement the namespace of the NN. In the current implementation the boundary of these classes are not fully clear.This jira tracks the effort...
http://issues.apache.org/jira/browse/HDFS-7416    Author: Haohui Mai, 2014-11-20, 21:30
[HDFS-7406] SimpleHttpProxyHandler puts incorrect "Connection: Close" header - HDFS - [issue]
...tcpdump reveals that SimpleHttpProxyHandler puts incorrect values of the Connection header:Connection: io.netty.channel.ChannelFutureListener$1@36866933which should beConnection: close...
http://issues.apache.org/jira/browse/HDFS-7406    Author: Haohui Mai, 2014-11-19, 15:26
[HDFS-7404] Remove o.a.h.hdfs.server.datanode.web.resources - HDFS - [issue]
...After HDFS-7279 both DatanodeWebHdfsMethods and OpenEntity are dead. The jira proposes to remove them....
http://issues.apache.org/jira/browse/HDFS-7404    Author: Haohui Mai, 2014-11-18, 19:08
[HDFS-7279] Use netty to implement DatanodeWebHdfsMethods - HDFS - [issue]
...Currently the DN implements all related webhdfs functionality using jetty. As the current jetty version the DN used (jetty 6) lacks of fine-grained buffer and connection management, DN often...
http://issues.apache.org/jira/browse/HDFS-7279    Author: Haohui Mai, 2014-11-18, 15:29
[HDFS-7270] Implementing congestion control in writing pipeline - HDFS - [issue]
...When a client writes to HDFS faster than the disk bandwidth of the DNs, it  saturates the disk bandwidth and put the DNs unresponsive. The client only backs off by aborting / recovering...
http://issues.apache.org/jira/browse/HDFS-7270    Author: Haohui Mai, 2014-11-18, 01:29
[HDFS-5923] Do not persist the ACL bit in the FsPermission - HDFS - [issue]
...The current implementation persists and ACL bit in FSImage and editlogs. Moreover, the security decisions also depend on whether the bit is set.The problem here is that we have to maintain t...
http://issues.apache.org/jira/browse/HDFS-5923    Author: Haohui Mai, 2014-11-14, 17:55
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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