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[SPARK-1015] Visualize the DAG of RDD - Spark - [issue]
...The DAG of RDD can help user understand the data flow and how spark get the final RDD executed.  It could help user to find chances to optimize the execution of some complex RDD.  ...
http://issues.apache.org/jira/browse/SPARK-1015    Author: Jeff Zhang, 2015-02-27, 09:52
[TEZ-2070] Controller class of output should be committer rather than initializer in DAG's dot file - Tez - [issue]
http://issues.apache.org/jira/browse/TEZ-2070    Author: Jeff Zhang, 2015-02-27, 02:49
[TEZ-2094] TEZ-UI Running Task/TaskAttempt are not excluded when choosing other status in the Dropdownlist - Tez - [issue]
http://issues.apache.org/jira/browse/TEZ-2094    Author: Jeff Zhang, 2015-02-26, 11:22
[TEZ-1972] Visualize Vertex Group as subgraph - Tez - [issue]
...In the dot file, the vertex group info is missed, we can group the vertex group as subgraph.  Attachment is a simple example....
http://issues.apache.org/jira/browse/TEZ-1972    Author: Jeff Zhang, 2015-02-26, 06:33
[TEZ-2038] TEZ-UI DAG is always running in tez-ui when the app is failed but no DAGFinishedEvent is logged - Tez - [issue]
...If AM crashed before DAG is finished, there wouldn't be DAGFinishedEvent.  In this case, DAG is always shown as running in tez-ui, but the yarn application is actually finished....
http://issues.apache.org/jira/browse/TEZ-2038    Author: Jeff Zhang, 2015-02-17, 02:32
[expand - 1 more] - Re: Could not open ambari web ui - Ambari - [mail # user]
...thanks, it worksOn Mon, Feb 16, 2015 at 11:35 PM, Erin Boyd  wrote:Best RegardsJeff Zhang ...
   Author: Jeff Zhang, 2015-02-17, 01:46
[PIG-4418] NullPointerException in JVMReuseImpl - Pig - [issue]
...2015-02-13 15:17:11,067 INFO [TezChild] task.TezTaskRunner: Encounted an error while executing task: attempt_1423730493153_0019_1_04_000002_0java.lang.NullPointerException at org.apache.pig....
http://issues.apache.org/jira/browse/PIG-4418    Author: Jeff Zhang, 2015-02-16, 08:31
[TEZ-2110] Display locality info on tez-ui - Tez - [issue]
...May also show locality statistics at vertex level on vertex view....
http://issues.apache.org/jira/browse/TEZ-2110    Author: Jeff Zhang, 2015-02-16, 05:37
[TEZ-2111] Show duration histogram of TaskAttempt on tez-ui - Tez - [issue]
...It could help user to identify which task attempt is slow, may due to data skew or other reasons....
http://issues.apache.org/jira/browse/TEZ-2111    Author: Jeff Zhang, 2015-02-16, 03:01
[TEZ-2109] Add locality info in TaskAttemptStartedEvent - Tez - [issue]
http://issues.apache.org/jira/browse/TEZ-2109    Author: Jeff Zhang, 2015-02-16, 02:36
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NEW: Monitor These Apps!
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