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Re: thrift_transmit_timer very large - Impala - [mail # user]
...Most time is spent waiting for the client to fetch more rows:ClientFetchWaitTimer: 5s188msSince this is an HS2 connection, you might be paying the penalty for therelatively inefficient HS2 V...
   Author: Henry Robinson, 2014-09-25, 22:54
[expand - 1 more] - Re: impala statestored crashed because network issue - Impala - [mail # user]
...Hi Jung-Yup -Thanks for the stack trace! The error is thrown when Thrift closes a socketand flushes any pending writes. I have a patch written that deals with thisscenario, should be availab...
   Author: Henry Robinson, 2014-09-08, 23:50
[expand - 2 more] - Re: INSERT INTO parquet table not honoring 'location' while storing data on hdfs - Impala - [mail # user]
...Yep, I'm pretty sure that's the issue. Try upgrading to 1.4, if you'reable?HenryOn 27 August 2014 11:08, Hemalatha Chakrapani  wrote:Henry RobinsonSoftware EngineerCloudera415-994-6679T...
   Author: Henry Robinson, 2014-08-27, 18:26
Re: Data loss scenario - Zookeeper - [mail # user]
...IIRC, C cannot become the master because it does not have all the changesthat A and B have seen. The leader election protocol can take care ofensuring the invariant that the elected master m...
   Author: Henry Robinson, 2014-08-20, 17:34
Re: Is alter view atomic? - Impala - [mail # user]
...To add one small clarification: only the Impala demon that plans the queryneeds to have an up-to-date view of the metadata. So as long as your SELECTqueries are issued against the same node ...
   Author: Henry Robinson, 2014-08-07, 17:37
[HDFS-3227] Mavenise libhdfs tests - HDFS - [issue]
...There's a TODO in hadoop-hdfs/pom.xml that refers to getting the native tests wired up. hdfs_test is built as part of the compilation step. The trick is to get HADOOP_HOME set up correctly f...
http://issues.apache.org/jira/browse/HDFS-3227    Author: Henry Robinson, 2014-07-31, 18:50
Re: a newbie question about Impala on hdfs - Impala - [mail # user]
...Impala doesn't use MapReduce, but instead has a purpose-built executionengine that is much more efficient. Impala's SQL support is constantlyexpanding, but there are no fundamental limitatio...
   Author: Henry Robinson, 2014-07-30, 18:18
Re: Fighting the llama : errors in YARN - Impala - [mail # user]
...Hi Nico -This does indeed look like a bug; the question is how it's gettingtriggered and if we can fashion a workaround.Are you able to share your full Llama and Impala logs? Feel free to ma...
   Author: Henry Robinson, 2014-07-29, 23:27
Re: set query time in impala v1.1.1 - Impala - [mail # user]
...Hi -The query timeout feature only arrived in Impala 1.2.1 (seehttps://issues.cloudera.org//browse/IMPALA-470). I suggest upgrading to thelatest release of Impala anyhow, since there have be...
   Author: Henry Robinson, 2014-07-28, 18:28
Re: Impala Timestamp Data type valid date range - Impala - [mail # user]
...Hi -Yes, Impala handles timestamps only in the range 1400-Jan-01 to9999-Dec-31, thanks to the library which we use to parse dates from strings.Best,HenryOn 14 July 2014 10:29, jjaco4  w...
   Author: Henry Robinson, 2014-07-14, 21:58
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