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[HIVE-10331] ORC : Is null SARG filters out all row groups written in old ORC format - Hive - [issue]
...Queries are returning wrong results as all row groups gets filtered out and no rows get scanned.SELECT   count(*)    FROM        store_sales...
http://issues.apache.org/jira/browse/HIVE-10331    Author: Mostafa Mokhtar, 2015-04-17, 20:42
[HIVE-10350] CBO: Use total size instead of bucket count to determine number of splits & parallelism - Hive - [issue]
...Not an overflow but parallelism ends up being -1 as it uses number of buckets final int parallelism = RelMetadataQuery.splitCount(join) == null           &...
http://issues.apache.org/jira/browse/HIVE-10350    Author: Mostafa Mokhtar, 2015-04-17, 03:52
[HIVE-10369] CBO: Don't use HiveDefaultCostModel when With Tez and hive.cbo.costmodel.extended enabled - Hive - [issue]
...When calculating parallelism, we end up using  HiveDefaultCostModel. getSplitCount which returns null instead of  HiveOnTezCostModel.getSplitCount which results in wrong parallelis...
http://issues.apache.org/jira/browse/HIVE-10369    Author: Mostafa Mokhtar, 2015-04-17, 03:52
[HIVE-10244] Vectorization : TPC-DS Q80 fails with java.lang.ClassCastException when hive.vectorized.execution.reduce.enabled is enabled - Hive - [issue]
...Query set hive.vectorized.execution.reduce.enabled=true;with ssr as (select  s_store_id as store_id,          sum(ss_ext_sales_price) as sales, &...
http://issues.apache.org/jira/browse/HIVE-10244    Author: Mostafa Mokhtar, 2015-04-16, 19:36
[HIVE-8306] Map join sizing done by auto.convert.join.noconditionaltask.size doesn't take into account Hash table overhead and results in OOM - Hive - [issue]
...When hive.auto.convert.join.noconditionaltask = true we check noconditionaltask.size and if the sum of tables sizes in the map join is less than  noconditionaltask.size the plan would g...
http://issues.apache.org/jira/browse/HIVE-8306    Author: Mostafa Mokhtar, 2015-04-16, 02:20
[HIVE-10337] CBO (Calcite Return Path): java.lang.IndexOutOfBoundsException for query with rank() over(partition ...) - Hive - [issue]
...CBO throws Index out of bound exception for TPC-DS Q70.Query explainselect    sum(ss_net_profit) as total_sum   ,s_state   ,s_county   ,grouping_...
http://issues.apache.org/jira/browse/HIVE-10337    Author: Mostafa Mokhtar, 2015-04-14, 23:14
[HIVE-9695] Redundant filter operator in reducer Vertex when CBO is disabled - Hive - [issue]
...There is a redundant filter operator in reducer Vertex when CBO is disabled.Query select         ss_item_sk, ss_ticket_number, ss_store_sk    from&nbs...
http://issues.apache.org/jira/browse/HIVE-9695    Author: Mostafa Mokhtar, 2015-04-14, 06:42
[HIVE-7723] Explain plan for complex query with lots of partitions is slow due to in-efficient collection used to find a matching ReadEntity - Hive - [issue]
...Explain on TPC-DS query 64 took 11 seconds, when the CLI was profiled it showed that ReadEntity.equals is taking ~40% of the CPU.ReadEntity.equals is called from the snippet below.Again and ...
http://issues.apache.org/jira/browse/HIVE-7723    Author: Mostafa Mokhtar, 2015-04-12, 10:48
[HIVE-9647] Discrepancy in cardinality estimates between partitioned and un-partitioned tables - Hive - [issue]
...High-level summaryHiveRelMdSelectivity.computeInnerJoinSelectivity relies on per column number of distinct value to estimate join selectivity.The way statistics are aggregated for partitione...
http://issues.apache.org/jira/browse/HIVE-9647    Author: Mostafa Mokhtar, 2015-04-10, 06:13
[HIVE-10118] CBO (Calcite Return Path): Internal error: Cannot find common type for join keys - Hive - [issue]
...Query explain  select  ss_items.item_id       ,ss_item_rev       ,ss_item_rev/(ss_item_rev+cs_item_rev+ws_item_rev)/3 * 100 ss_dev ...
http://issues.apache.org/jira/browse/HIVE-10118    Author: Mostafa Mokhtar, 2015-04-07, 17:43
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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