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Issue when upgrading from Spark 1.1.0 to 1.1.1: Exception of java.lang.NoClassDefFoundError: io/netty/util/TimerTask - Spark - [mail # user]
...Everything worked fine on Spark 1.1.0 until we upgrade to 1.1.1. For some of our unit tests we saw the following exceptions. Any idea how to solve it? Thanks!java.lang.NoClassDefFoundError: ...
   Author: S. Zhou, 2014-12-10, 18:49
[expand - 1 more] - Re: Spark executor lost - Spark - [mail # user]
...Here is a sample exception I collected from a spark worker node: (there are many such errors across over work nodes). It looks to me that spark worker failed to communicate to executor local...
   Author: S. Zhou, 2014-12-04, 19:01
[expand - 2 more] - Re: how to access workers from spark context - Spark - [mail # user]
...actually if you search the spark mail archives you will find many similar topics. At this time, I just want to manage it by myself.On Tuesday, August 12, 2014 8:46 PM, Stanley Shi  wrot...
   Author: S. Zhou, 2014-08-13, 03:55
[expand - 1 more] - Re: A wired producer connection timeout issue - Kafka - [mail # user]
...Thanks Guozhang. Any ideas on what could be wrong on that machine? We set up multiple producers in the same way but only one has this issue.On Friday, August 8, 2014 2:41 PM, Guozhang Wang &...
   Author: S. Zhou, 2014-08-08, 21:43
Hadoop exception: DFSInputStream.java: - Error making BlockReader. Closing stale NioInetPeer - Hadoop - [mail # user]
...The exception happens on hadoop 2.2 version. The whole error message is shown below. Notice that the level is DEBUG. Not sure if such exception is serious.=2014-06-05 14:39:31,135 DEBUG [poo...
   Author: S. Zhou, 2014-06-06, 17:08
HBase exception: Failed after retry of OutOfOrderScannerNextException - HBase - [mail # user]
...I saw the following exceptions happened frequently: any hints?Failed to scan rows on table XXXX: start=0000000004, end=0000000005, Failed after retry of OutOfOrderScannerNextException: was t...
   Author: S. Zhou, 2014-05-23, 18:21
how to get the failed rows when executing a batch PUT request? - HBase - [mail # user]
...I checked the Java doc on "put(List puts)" of HTableInterface and it does not say how to get the failed rows in case exception happened (see below): can I assume the failed rows are containe...
   Author: S. Zhou, 2013-12-31, 19:17
[expand - 1 more] - Re: How to delete multiple columns in the same row? - HBase - [mail # user]
...Thanks Ted & Lars. For the clarification of Java doc for "Delete",  I would say: adding some statement like "call this method once for each column to be deleted"      On Monda...
   Author: S. Zhou, 2013-12-31, 02:30
Re: AsyncHBase 1.5.0-rc1 available for download and testing (HBase 0.96 compatibility inside) - HBase - [mail # user]
...I am trying the new version and run into some problem: details here:  https://groups.google.com/forum/#!topic/asynchbase/zsIsLOZgiVc Could u please help? We are trying to migrate to Had...
   Author: S. Zhou, 2013-12-24, 16:34
copy data inter-cluster with different version of Hadoop - HBase - [mail # user]
...I need to copy data from Hadoop cluster A to cluster B. I know I can use "distCp" tool to do that. Now the problem is: cluster A has version 1.2.1 and cluster B has version 0.20.x.  So "dist...
   Author: S. Zhou, 2013-10-28, 19:14
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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