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[HIVE-7710] Rename table across database might fail - Hive - [issue]
...If there is already a table d1.t2, the following rename statement would fail. alter table  d1.t1 rename to d2.t2; //Exception2014-08-13 03:32:40,512 ERROR Datastore.Persist (Log4JLogger...
http://issues.apache.org/jira/browse/HIVE-7710    Author: Chun Chen, 2014-08-18, 06:42
[HIVE-6309] Hive incorrectly removes TaskAttempt output files if MRAppMaster fails once - Hive - [issue]
...We recently upgrade to hadoop2.2 and sometimes find some tables lost several data files after a mid night ETL process. We find that these MapReduce jobs which generate the partial tables hav...
http://issues.apache.org/jira/browse/HIVE-6309    Author: Chun Chen, 2014-01-27, 02:39
[HIVE-5358] ReduceSinkDeDuplication should ignore column orders when check overlapping part of keys between parent and child - Hive - [issue]
...select key, value from (select key, value from src group by key, value) t group by key, value;This can be optimized by ReduceSinkDeDuplicationselect key, value from (select key, value from s...
http://issues.apache.org/jira/browse/HIVE-5358    Author: Chun Chen, 2013-10-20, 17:07
[HIVE-5575] ZooKeeper connection closed when unlock with retry - Hive - [issue]
...See the attachment, I have encountered a scenario that hive retries to  unlock all locks, but zookeeper session is closed. If there are hundreds of locks, say dynamic partition, the pro...
http://issues.apache.org/jira/browse/HIVE-5575    Author: Chun Chen, 2013-10-20, 06:10
[HIVE-5357] ReduceSinkDeDuplication optimizer pick the wrong keys in pRS-cGBYm-cRS-cGBYr scenario when there are distinct keys in child GBY - Hive - [issue]
...Example:select key, count(distinct value) from (select key, value from src group by key, value) t group by key;//result0 0 NULL10  10  NULL100 100 NULL103 103 NULL104 104 NULLObvio...
http://issues.apache.org/jira/browse/HIVE-5357    Author: Chun Chen, 2013-10-01, 02:03
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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