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[HDFS-8782] Upgrade to block ID-based DN storage layout delays DN registration - HDFS - [issue]
...We have seen multiple incidents at production sites that there are long delays for DNs to register to the NN when upgrading to post 2.6 release.Further investigation shows that the DN is blo...    Author: Haohui Mai , 2016-03-31, 10:05
[HDFS-10184] Introduce unit tests framework for HDFS UI - HDFS - [issue]
...The current HDFS UI is based on HTML5 and it does not have unit tests yet. Occasionally things break and we can't catch it. We should investigate and introduce unit test frameworks such as M...    Author: Haohui Mai , 2016-03-22, 10:14
[HDFS-9815] Move o.a.h.fs.Hdfs to hadoop-hdfs-client - HDFS - [issue]
...the o.a.h.fs.Hdfs is used by the FileContext API. It should belong to the hadoop-hdfs-client module....    Author: Haohui Mai , 2016-02-16, 19:01
HDFS Abstract Filesystem and hadoop-client - HDFS - [mail # dev]
...Thanks for catching them. I think it should be moved as well. FiledHDFS-9815 to track the effort.~HaohuiOn Mon, Feb 15, 2016 at 4:01 AM, Steve Loughran  wrote:...
   Author: Haohui Mai , 2016-02-16, 05:56
Review HDFS-7588 please? - HDFS - [mail # dev]
...Thanks for the ping. I'll take a look at it.Regards,HaohuiOn Fri, Feb 12, 2016 at 3:56 PM, Ravi Prakash  wrote:...
   Author: Haohui Mai , 2016-02-15, 06:23
[HDFS-6565] Use jackson instead jetty json in hdfs-client - HDFS - [issue]
...hdfs-client should use Jackson instead of jetty to parse JSON....    Author: Haohui Mai , 2016-01-30, 02:50
[HDFS-9680] Doing a lsr against WebImageViewer is slow - HDFS - [issue]
...We have experienced a performance issue that doing lsr against the WebImageViewer.For a fsimage that has around 140m files, it takes around ~35 minutes to do the lsr across the live cluster,...    Author: Haohui Mai , 2016-01-22, 00:04
[HDFS-8767] RawLocalFileSystem.listStatus() returns null for UNIX pipefile - HDFS - [issue]
...Calling FileSystem.listStatus() on a UNIX pipe file returns null instead of the file. The bug breaks Hive when Hive loads data from UNIX pipe file....    Author: Haohui Mai , 2016-01-14, 14:06
[HDFS-9454] Remove guava usage in the hdfs-client module - HDFS - [issue]
...The following classes in hdfs-client use Google's guava library:./src/main/java/org/apache/hadoop/hdfs/    Author: Haohui Mai , 2015-12-18, 01:17
[HDFS-9417] Clean up the RAT warnings in the HDFS-8707 branch. - HDFS - [issue]
...Recent jenkins builds reveals that the pom.xml in the HDFS-8707 branch does not currently exclude third-party files. The RAT plugin generates warnings as these files do not have Apache heade...    Author: Haohui Mai , 2015-12-08, 22:44