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Fw: read this - Hadoop - [mail # general]
...Hello! New message, please read  Hairong Kuang ...
   Author: Hairong Kuang, 2015-09-29, 05:53
[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, 2015-07-15, 21:27
[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, 2015-06-09, 13:17
[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, 2015-05-09, 16:30
[HADOOP-6897] FileSystem#mkdirs(FileSystem, Path, FsPermission) should not call setPermission if mkdirs failled - Hadoop - [issue]
...Here is the piece of code that has the bug. fs.setPermission should not be called if result is false.  public static boolean mkdirs(FileSystem fs, Path dir, FsPermission permission)&nbs...
http://issues.apache.org/jira/browse/HADOOP-6897    Author: Hairong Kuang, 2015-02-05, 02:14
[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
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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