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[HDFS-7314] When the DFSClient lease cannot be renewed, abort open-for-write files rather than the entire DFSClient - HDFS - [issue]
...It happened in YARN nodemanger scenario. But it could happen to any long running service that use cached instance of DistrbutedFileSystem.1. Active NN is under heavy load. So it became unava...
http://issues.apache.org/jira/browse/HDFS-7314    Author: Ming Ma, 2015-09-03, 23:43
[HDFS-9016] Display upgrade domain information in fsck - HDFS - [issue]
...We can add a new command line parameter called "-upgradedomain" to fsck to display the upgrade domain value of each replica....
http://issues.apache.org/jira/browse/HDFS-9016    Author: Ming Ma, 2015-09-03, 15:44
[HDFS-9015] Refactor TestReplicationPolicy to test different block placement policies - HDFS - [issue]
...TestReplicationPolicy can be parameterized so that default policy, upgrade domain policy and other policies can share some common test cases....
http://issues.apache.org/jira/browse/HDFS-9015    Author: Ming Ma, 2015-09-03, 15:40
[HDFS-9004] Add upgrade domain to DatanodeInfo - HDFS - [issue]
...As part of upgrade domain feature, we first need to add upgrade domain string to DatanodeInfo. It includes things like: Add a new field to DatanodeInfo. Modify protobuf for DatanodeInfo. Upd...
http://issues.apache.org/jira/browse/HDFS-9004    Author: Ming Ma, 2015-09-03, 04:34
[HDFS-9007] Fix HDFS Balancer to honor upgrade domain policy - HDFS - [issue]
...In the current design of HDFS Balancer, it doesn't use BlockPlacementPolicy used by namenode runtime. Instead, it has somewhat redundant code to make sure block allocation conforms with the ...
http://issues.apache.org/jira/browse/HDFS-9007    Author: Ming Ma, 2015-09-02, 04:26
[HDFS-9006] Provide BlockPlacementPolicy that supports upgrade domain - HDFS - [issue]
...As part of the upgrade domain feature, we need to provide the actual upgrade domain block placement.Namenode provides a mechanism to specify custom block placement policy. We can use that to...
http://issues.apache.org/jira/browse/HDFS-9006    Author: Ming Ma, 2015-09-02, 04:13
[HDFS-9005] Provide support for upgrade domain script - HDFS - [issue]
...As part of the upgrade domain feature, we need to provide a mechanism to specify upgrade domain for each datanode. One way to accomplish that is to allow admins specify an upgrade domain scr...
http://issues.apache.org/jira/browse/HDFS-9005    Author: Ming Ma, 2015-09-02, 04:09
[HDFS-8874] Add DN metrics for balancer and other block movement scenarios - HDFS - [issue]
...For balancer, mover and migrator (HDFS-8789), we want to know how close it is to the DN's throttling thresholds. Although DN has existing metrics such as BytesWritten, BytesRead, CopyBlockOp...
http://issues.apache.org/jira/browse/HDFS-8874    Author: Ming Ma, 2015-09-02, 01:56
[HDFS-8940] Support for large-scale multi-tenant inotify service - HDFS - [issue]
...HDFS-6634 provides the core inotify functionality. We would like to extend that to provide a large-scale service that ten of thousands of clients can subscribe to....
http://issues.apache.org/jira/browse/HDFS-8940    Author: Ming Ma, 2015-09-02, 01:17
[HDFS-7182] JMX metrics aren't accessible when NN is busy - HDFS - [issue]
...HDFS-5693 has addressed all NN JMX metrics in hadoop 2.0.5. Since then couple new metrics have been added. It turns out "RollingUpgradeStatus" requires FSNamesystem read lock....
http://issues.apache.org/jira/browse/HDFS-7182    Author: Ming Ma, 2015-08-31, 05:31
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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