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[HADOOP-6569] FsShell#cat should avoid calling unecessary getFileStatus before opening a file to read - Hadoop - [issue]
...Since FileSystem#open throws a FileNotFoundException when the file to be read does not exist, there is no need to check if the file is a directory or not before open. In case of HDFS, this c...
http://issues.apache.org/jira/browse/HADOOP-6569    Author: Hairong Kuang, 2013-08-14, 05:54
[HADOOP-1995] Path can not handle a file name that contains a back slash - Hadoop - [issue]
...When normalizing a path name, Path incorrectly converts a back slash to a path separator even if  the path name is of the unix style. This prohibs a glob from using a back slash to esca...
http://issues.apache.org/jira/browse/HADOOP-1995    Author: Hairong Kuang, 2013-03-25, 15:53
[HADOOP-2575] Shell command ls should support option -d - Hadoop - [issue]
...Shell command "ls" currently does not support option -d. Meanwhile the shell supports command "stat", but needs to supply the print format specifying which attributes to print on the screen....
http://issues.apache.org/jira/browse/HADOOP-2575    Author: Hairong Kuang, 2012-10-15, 22:13
[HADOOP-6732] Improve FsShell's heap consumption by switching to listStatus that returns an iterator - Hadoop - [issue]
...When listing a large directory from the command line using the default heap configuration, FsShell often runs out of memory. This is because all stats of the entries under the directory need...
http://issues.apache.org/jira/browse/HADOOP-6732    Author: Hairong Kuang, 2012-09-22, 10:45
[HADOOP-7165] listLocatedStatus(path, filter) is not redefined in FilterFs - Hadoop - [issue]
...listLocatedStatus(path, filter) is not redefined in FilterFs. So if a job client uses a FilterFs to talk to NameNode, it does not trigger the bulk location optimization....
http://issues.apache.org/jira/browse/HADOOP-7165    Author: Hairong Kuang, 2012-09-22, 09:23
[HADOOP-6889] Make RPC to have an option to timeout - Hadoop - [issue]
...Currently Hadoop RPC does not timeout when the RPC server is alive. What it currently does is that a RPC client sends a ping to the server whenever a socket timeout happens. If the server is...
http://issues.apache.org/jira/browse/HADOOP-6889    Author: Hairong Kuang, 2012-08-22, 22:04
[HADOOP-692] Rack-aware Replica Placement - Hadoop - [issue]
...This issue assumes that HDFS runs on a cluster of computers that spread across many racks. Communication between two nodes on different racks needs to go through switches. Bandwidth in/out o...
http://issues.apache.org/jira/browse/HADOOP-692    Author: Hairong Kuang, 2012-05-19, 18:05
[HADOOP-6904] A baby step towards inter-version RPC communications - Hadoop - [issue]
...Currently RPC communications in Hadoop is very strict. If a client has a different version from that of the server, a VersionMismatched exception is thrown and the client can not connect to ...
http://issues.apache.org/jira/browse/HADOOP-6904    Author: Hairong Kuang, 2012-04-06, 23:07
[HADOOP-6502] DistributedFileSystem#listStatus is very slow when listing a directory with a size of 1300 - Hadoop - [issue]
...When listing a directory of around 1300 children, it takes hundreds of milliseconds. It turns out the slowdowness is caused by the change made by HADOOP-4187. The return value of listStatus ...
http://issues.apache.org/jira/browse/HADOOP-6502    Author: Hairong Kuang, 2012-03-28, 09:19
[HDFS-186] directory browser should paginate the list of files - Hadoop - [issue]
...The DFS Web UI directory browser should paginate the list, so that directories with large no. of files in them can still be displayed in constant time (and not require too much load on the n...
http://issues.apache.org/jira/browse/HDFS-186    Author: Hairong Kuang, 2011-07-18, 13:59
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