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[HDFS-6919] Enforce a single limit for RAM disk usage and replicas cached via locking - HDFS - [issue]
...The DataNode can have a single limit for memory usage which applies to both replicas cached via CCM and replicas on RAM disk.See comments 1, 2 and 3 for discussion....
http://issues.apache.org/jira/browse/HDFS-6919    Author: Arpit Agarwal, 2014-10-16, 23:58
[HDFS-6744] Improve decommissioning nodes and dead nodes access on the new NN webUI - HDFS - [issue]
...The new NN webUI lists live node at the top of the page, followed by dead node and decommissioning node. From admins point of view:1. Decommissioning nodes and dead nodes are more interestin...
http://issues.apache.org/jira/browse/HDFS-6744    Author: Ming Ma, 2014-10-16, 19:39
[HDFS-7255] Customize Java Heap min/max settings for individual processes - HDFS - [issue]
...The NameNode and JournalNode (and ZKFC) can all run on the same machine. However, they get their heap settings from HADOOP_HEAPSIZE/JAVA_HEAP_MAX. There are scenarios where the NameNode proc...
http://issues.apache.org/jira/browse/HDFS-7255    Author: Mark Tse, 2014-10-16, 19:22
[HDFS-7185] The active NameNode will not accept an fsimage sent from the standby during rolling upgrade - HDFS - [issue]
...The active NameNode will not accept an fsimage sent from the standby during rolling upgrade.  The active fails with the exception:18:25:07,620  WARN ImageServlet:198 - Received an ...
http://issues.apache.org/jira/browse/HDFS-7185    Author: Colin Patrick McCabe, 2014-10-16, 14:59
[HDFS-5089] When a LayoutVersion support SNAPSHOT, it must support FSIMAGE_NAME_OPTIMIZATION. - HDFS - [issue]
...The SNAPSHOT layout requires FSIMAGE_NAME_OPTIMIZATION as a prerequisite.  However, RESERVED_REL1_3_0 supports SNAPSHOT but not FSIMAGE_NAME_OPTIMIZATION....
http://issues.apache.org/jira/browse/HDFS-5089    Author: Tsz Wo Nicholas Sze, 2014-10-16, 14:59
[HDFS-7208] NN doesn't schedule replication when a DN storage fails - HDFS - [issue]
...We found the following problem. When a storage device on a DN fails, NN continues to believe replicas of those blocks on that storage are valid and doesn't schedule replication.A DN has 12 s...
http://issues.apache.org/jira/browse/HDFS-7208    Author: Ming Ma, 2014-10-16, 14:59
[HDFS-6982] nntop: topĀ­-like tool for name node users - HDFS - [issue]
...In this jira we motivate the need for nntop, a tool that, similarly to what top does in Linux, gives the list of top users of the HDFS name node and gives insight about which users are sendi...
http://issues.apache.org/jira/browse/HDFS-6982    Author: Maysam Yabandeh, 2014-10-16, 04:34
[HDFS-6943] Improve NN allocateBlock log to include replicas' datanode IPs - HDFS - [issue]
...Datanode storage ID used to use IP and port. It has changed to use UUID. This makes debugging harder when we want to understand which DNs are assigned when DFSClient calls addBlock. For exam...
http://issues.apache.org/jira/browse/HDFS-6943    Author: Ming Ma, 2014-10-16, 02:27
[HDFS-7253] getBlockLocationsUpdateTimes missing handle exception may cause fsLock dead lock - HDFS - [issue]
...One day my active namenode hanged and I dumped the program stacks by jstack.In the stacks file, I saw most threads were waiting FSNamesystem.fsLock, both  readLock and writeLock were un...
http://issues.apache.org/jira/browse/HDFS-7253    Author: Carrey Zhan, 2014-10-15, 13:14
[HDFS-7250] Store blocks in slabs rather than a Map inside BlocksMap - HDFS - [issue]
...Key to every block is the replication factor + slab key (address).When setting a different replication factor for a block we need to move its data from one slab to another....
http://issues.apache.org/jira/browse/HDFS-7250    Author: Amir Langer, 2014-10-14, 12:43
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