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[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, 2014-07-30, 19:34
[HADOOP-414] replace class UTF8 with class Text - Hadoop - [issue]
...Since class UTF8 is deprecated, all references of UTF8 in hadoop should be replaced with class Text if the change does not break the system....
http://issues.apache.org/jira/browse/HADOOP-414    Author: Hairong Kuang, 2014-07-18, 06:00
[HADOOP-2975] IPC server should not allocate a buffer for each request - Hadoop - [issue]
...Currently the IPC server allocates a buffer for each incoming request. The buffer is thrown away after the request is serialized. This leads to very inefficient heap utilization. It would be...
http://issues.apache.org/jira/browse/HADOOP-2975    Author: Hairong Kuang, 2014-07-17, 22:35
[HADOOP-2864] Improve the Scalability and Robustness of IPC - Hadoop - [issue]
...This jira is intended to enhance IPC's scalability and robustness. Currently an IPC server can easily hung due to a disk failure or garbage collection, during which it cannot respond to the ...
http://issues.apache.org/jira/browse/HADOOP-2864    Author: Hairong Kuang, 2014-07-17, 22:00
[HADOOP-1464] IPC server should not log thread stacks at the info level - Hadoop - [issue]
...Currently when IPC server get a call which becomes too old, i.e. the call has not been served for too long time, it dumps all thread stacks to logs at the info level. Because the size of all...
http://issues.apache.org/jira/browse/HADOOP-1464    Author: Hairong Kuang, 2014-07-17, 18:15
[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-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
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