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[HIVE-7151] NULL keys should not be shuffled for inner equi joins - Hive - [issue]
...There is a huge skew in reducer load for NULL keys in shuffle joins, resulting in one slow reducer out of many.The NULL keys will not contribute towards the inner JOIN condition for equality...
http://issues.apache.org/jira/browse/HIVE-7151    Author: Gopal V, 2014-05-31, 20:18
[HIVE-6391] Use pre-warm APIs in Tez to improve hive query startup - Hive - [issue]
...With the addition of TEZ-766, Tez supports pre-warmed containers within the Tez session.Allow hive users to enable and use this feature from within the hive shell....
http://issues.apache.org/jira/browse/HIVE-6391    Author: Gopal V, 2014-04-23, 08:17
[HIVE-6787] ORC+ACID assumes all missing buckets are in ACID structure - Hive - [issue]
...ORC+ACID creates ACID structure splits for all missing buckets in a tablejava.lang.RuntimeException: java.io.IOException: java.io.IOException: Vectorization and ACID tables are incompatible....
http://issues.apache.org/jira/browse/HIVE-6787    Author: Gopal V, 2014-04-08, 16:12
[HIVE-6662] Vector Join operations with DATE columns fail - Hive - [issue]
...Trying to generate a DATE column as part of a JOIN's output throws an exceptionCaused by: org.apache.hadoop.hive.ql.metadata.HiveException: Incompatible Long vector column and primitive cate...
http://issues.apache.org/jira/browse/HIVE-6662    Author: Gopal V, 2014-03-29, 05:32
[HIVE-6748] FileSinkOperator needs to cleanup held references for container reuse - Hive - [issue]
...The current implementation of FileSinkOperator runs into trouble when reusing the same query pipeline aggressively with container reuse.This is due to a prevFSP writer which is left referenc...
http://issues.apache.org/jira/browse/HIVE-6748    Author: Gopal V, 2014-03-28, 05:52
[HIVE-6751] maxtaskfailures.per.node is set to too low a threshold - Hive - [issue]
...The node blacklisting results in a task retry system which can consume cluster resources excessively with queries which will eventually fail.For a large stage query, on a 20 node cluster, wi...
http://issues.apache.org/jira/browse/HIVE-6751    Author: Gopal V, 2014-03-26, 02:00
[HIVE-4051] Hive's metastore suffers from 1+N queries when querying partitions & is slow - Hive - [issue]
...Hive's query client takes a long time to initialize & start planning queries because of delays in creating all the MTable/MPartition objects.For a hive db with 1800 partitions, the metas...
http://issues.apache.org/jira/browse/HIVE-4051    Author: Gopal V, 2014-03-25, 07:28
[HIVE-6369] ORC Writer (int RLE v2) fails with ArrayIndexOutOfBounds - Hive - [issue]
...The ORC writer for store_sales TPC-DS table fails with 2014-01-30 09:23:07,819 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child : java.lang.ArrayIndexOutOfBoundsExcept...
http://issues.apache.org/jira/browse/HIVE-6369    Author: Gopal V, 2014-03-22, 06:31
[HIVE-6518] Add a GC canary to the VectorGroupByOperator to flush whenever a GC is triggered - Hive - [issue]
...The current VectorGroupByOperator implementation flushes the in-memory hashes when the maximum entries or fraction of memory is hit.This works for most cases, but there are some corner cases...
http://issues.apache.org/jira/browse/HIVE-6518    Author: Gopal V, 2014-03-17, 18:41
[HIVE-6654] SimpleFetchOptimizer ignores views - Hive - [issue]
...SimpleFetchOptimizer optimizes "select * from session_orc limit 1;"But when an alias view is created like "create view session as select * from session_orc";The simple fetch optimizer fails ...
http://issues.apache.org/jira/browse/HIVE-6654    Author: Gopal V, 2014-03-15, 14:40
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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