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[HIVE-12491] Column Statistics: 3 attribute join on a 2-source table is off - Hive - [issue]
...The eased out denominator has to detect duplicate row-stats from different attributes.  private Long getEasedOutDenominator(List<Long> distinctVals) {      // Expon...
http://issues.apache.org/jira/browse/HIVE-12491    Author: Gopal V, 2015-11-25, 18:24
[HIVE-12490] Metastore: Mysql ANSI_QUOTES is not there for some cases - Hive - [issue]
...Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right synta...
http://issues.apache.org/jira/browse/HIVE-12490    Author: Gopal V, 2015-11-25, 10:26
[HIVE-12479] Vectorization: Vectorized Date UDFs with up-stream Joins - Hive - [issue]
...The row-counts expected with and without vectorization differ.The attached small-scale repro case produces 5 rows with vectorized multi-key joins and 53 rows without the vectorized join....
http://issues.apache.org/jira/browse/HIVE-12479    Author: Gopal V, 2015-11-25, 10:16
[HIVE-12473] DPP: UDFs on the partition column side does not evaluate correctly - Hive - [issue]
...Related to HIVE-12462select count(1) from accounts a, transactions t where year(a.dt) = year(t.dt) and account_id = 22;$hdt$_0:$hdt$_1:a  TableScan (TS_2)    alias: a  &n...
http://issues.apache.org/jira/browse/HIVE-12473    Author: Gopal V, 2015-11-25, 10:05
[HIVE-12463] VectorMapJoinFastKeyStore has Array OOB errors - Hive - [issue]
...When combining different sized keys, observing an occasional error in hashtable probes.Caused by: java.lang.ArrayIndexOutOfBoundsException: 162046429 at org.apache.hadoop.hive.ql.exec.vector...
http://issues.apache.org/jira/browse/HIVE-12463    Author: Gopal V, 2015-11-25, 09:09
[HIVE-12462] DPP: DPP optimizers need to run on the TS predicate not FIL - Hive - [issue]
...HIVE-11398 + HIVE-11791, the partition-condition-remover became more effective.This removes predicates from the FilterExpression which involve partition columns, causing a miss for dynamic-p...
http://issues.apache.org/jira/browse/HIVE-12462    Author: Gopal V, 2015-11-25, 08:58
[HIVE-9820] LLAP: Use a share-nothing scoreboard /status implementation - Hive - [issue]
...To prevent thread-conflicts in executor information, the Apache HTTP servers use a share-nothing data structure known as a scoreboard.This is read by various systems like mod_status to read ...
http://issues.apache.org/jira/browse/HIVE-9820    Author: Gopal V, 2015-11-24, 02:45
[HIVE-12492] MapJoin: 4 million unique integers seems to be a probe plateau - Hive - [issue]
...After 4 million keys, the map-join implementation seems to suffer from a performance degradation. The hashtable build & probe time makes this very inefficient, even if the data is very c...
http://issues.apache.org/jira/browse/HIVE-12492    Author: Gopal V, 2015-11-23, 19:32
[HIVE-12477] CBO: Left Semijoins are incompatible with a cross-product - Hive - [issue]
...with HIVE-12017 in place, a few queries generate left sem-joins without a key.This is an invalid plan and can be produced by doing.explain logical select count(1) from store_sales where ss_s...
http://issues.apache.org/jira/browse/HIVE-12477    Author: Gopal V, 2015-11-20, 03:39
[HIVE-10132] LLAP: Tez heartbeats are delayed by ~500+ ms due to Hadoop IPC client - Hive - [issue]
...HADOOP-11772 has a clearer bug report of the core issue inside hadoop-common.Due to the delayed heartbeats reaching the AM, the reducers are losing up-to a couple of seconds for a 60ms (x10 ...
http://issues.apache.org/jira/browse/HIVE-10132    Author: Gopal V, 2015-11-18, 02:15
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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