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[HADOOP-10512] Document usage of node-group layer topology - Hadoop - [issue]
...For work under umbrella of HADOOP-8468, user can enable nodegroup layer between node and rack in some situations. We should document it after YARN-18 and YARN-19 is figured out....
http://issues.apache.org/jira/browse/HADOOP-10512    Author: Junping Du, 2014-04-16, 22:08
[HADOOP-9964] O.A.H.U.ReflectionUtils.printThreadInfo() is not thread-safe which cause TestHttpServer pending 10 minutes or longer. - Hadoop - [issue]
...The printThreadInfo() in ReflectionUtils is not thread-safe which cause two or more threads calling this method from StackServlet to deadlock....
http://issues.apache.org/jira/browse/HADOOP-9964    Author: Junping Du, 2014-01-25, 20:06
[HADOOP-8468] Umbrella of enhancements to support different failure and locality topologies - Hadoop - [issue]
...The current hadoop network topology (described in some previous issues like: Hadoop-692) works well in classic three-tiers network when it comes out. However, it does not take into account o...
http://issues.apache.org/jira/browse/HADOOP-8468    Author: Junping Du, 2014-01-11, 00:15
[HADOOP-10006] Compilation failure in trunk for o.a.h.fs.swift.util.JSONUtil - Hadoop - [issue]
...The error is like following:...[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project hadoop-openstack: Compilation ...
http://issues.apache.org/jira/browse/HADOOP-10006    Author: Junping Du, 2013-09-30, 09:59
[HADOOP-9998] Provide methods to clear only part of the DNSToSwitchMapping - Hadoop - [issue]
...After HDFS-4521, once a DN is registered with invalid networktopology, all cached rack info in DNSToSwitchMapping will be cleared. We should only clear cache on specific nodes....
http://issues.apache.org/jira/browse/HADOOP-9998    Author: Junping Du, 2013-09-27, 15:16
[HADOOP-9980] LightWeightGSet's modification field should be volatile so that detect changes by other thread in iteration. - Hadoop - [issue]
...LightWeightGSet should have a volatile modification field (like: LightWeightHashSet or LightWeightLinkedSet) that is used to detect updates while iterating so they can throw a ConcurrentModi...
http://issues.apache.org/jira/browse/HADOOP-9980    Author: Junping Du, 2013-09-27, 04:22
[HADOOP-10001] Document topology with NodeGroup layer configuration in branch-1 - Hadoop - [issue]
...NodeGroup layer in NetworkTopology is supported after 1.2.0 release for hadoop better running on virtualization or other additional layer cases. A document settings in hdfs-site.xml and mapr...
http://issues.apache.org/jira/browse/HADOOP-10001    Author: Junping Du, 2013-09-27, 00:08
[HADOOP-8470] Implementation of 4-layer subclass of NetworkTopology (NetworkTopologyWithNodeGroup) - Hadoop - [issue]
...To support the four-layer hierarchical topology shown in attached figure as a subclass of NetworkTopology, NetworkTopologyWithNodeGroup was developed along with unit tests. NetworkTopologyWi...
http://issues.apache.org/jira/browse/HADOOP-8470    Author: Junping Du, 2013-08-27, 23:06
[HADOOP-9784] Add a builder for HttpServer - Hadoop - [issue]
...There are quite a lot of constructors in class of HttpServer to create instance. Create a builder class to abstract the building steps which helps to avoid more constructors in the future....
http://issues.apache.org/jira/browse/HADOOP-9784    Author: Junping Du, 2013-08-21, 15:57
[HADOOP-9756] Additional cleanup RPC code - Hadoop - [issue]
...HADOOP-9754 already did good job to address most of work for cleanup RPC code. Here is some additional work, include: Remove some unused deprecated code. Narrow "throws Exception" to throw s...
http://issues.apache.org/jira/browse/HADOOP-9756    Author: Junping Du, 2013-07-27, 08:12
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