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[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
[HADOOP-9451] Node with one topology layer should be handled as fault topology when NodeGroup layer is enabled - Hadoop - [issue]
...Currently, nodes with one layer topology are allowed to join in the cluster that with enabling NodeGroup layer which cause some exception cases. When NodeGroup layer is enabled, the cluster ...
http://issues.apache.org/jira/browse/HADOOP-9451    Author: Junping Du, 2013-06-20, 09:46
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