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[HIVE-10163] CommonMergeJoinOperator calls WritableComparator.get() in the inner loop - Hive - [issue]
...The CommonMergeJoinOperator wastes CPU looking up the correct comparator for each WritableComparable in each row.@SuppressWarnings("rawtypes")  private int compareKeys(List<Obje...
http://issues.apache.org/jira/browse/HIVE-10163    Author: Gopal V, 2015-03-31, 09:48
[HIVE-10164] LLAP: ORC BIGINT SARGs regressed after Parquet PPD fixes (HIVE-8122) - Hive - [issue]
...HIVE-8122 seems to have introduced a toString() to the ORC PPD codepath for BIGINT.https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/sarg/SearchArgumentImpl....
http://issues.apache.org/jira/browse/HIVE-10164    Author: Gopal V, 2015-03-31, 09:22
[HIVE-10162] LLAP: Avoid deserializing the plan > 1 times in a single thread - Hive - [issue]
...Kryo shows up in the critical hot-path for LLAP when using a plan with a very large filter condition, due to the fact that the plan is deserialized more than once for each task....
http://issues.apache.org/jira/browse/HIVE-10162    Author: Gopal V, 2015-03-31, 08:27
[HIVE-10161] LLAP: IO buffers seem to be hard-coded to 256kb - Hive - [issue]
...The EncodedReaderImpl will die when reading from the cache, when reading data written by the regular ORC writer Caused by: java.io.IOException: java.lang.IllegalArgumentException: Buffer siz...
http://issues.apache.org/jira/browse/HIVE-10161    Author: Gopal V, 2015-03-31, 08:16
[HIVE-10158] LLAP: Varchar columns are not handled in encoded readers - Hive - [issue]
...ORC Varchar columns can't be read off the cacheCaused by: java.io.IOException: java.lang.ClassCastException: org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl$VarcharTreeReader cannot be cas...
http://issues.apache.org/jira/browse/HIVE-10158    Author: Gopal V, 2015-03-31, 05:43
[HIVE-10128] BytesBytesMultiHashMap does not allow concurrent read-only access - Hive - [issue]
...The multi-threaded performance takes a serious hit when LLAP shares hashtables between the probe threads running in parallel. This is an explicit synchronized block inside ReusableRowContain...
http://issues.apache.org/jira/browse/HIVE-10128    Author: Gopal V, 2015-03-31, 05:26
[HIVE-10156] SimpleFetchOptimizer - disable all threshold check for an unfiltered select - Hive - [issue]
...SimpleFetchOptimizer does not optimize simple projections without a filter on an extremely large table by skipping to the FetchTask with -1 limit....
http://issues.apache.org/jira/browse/HIVE-10156    Author: Gopal V, 2015-03-31, 04:39
[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, 2015-03-28, 06:01
[HIVE-10121] Implement a hive --service udflint command to check UDF jars for common shading mistakes - Hive - [issue]
...Several SerDe and UDF jars tend to shade in various parts of the dependencies including hadoop-common or guava without relocation.Implement a simple udflint tool which automates some part of...
http://issues.apache.org/jira/browse/HIVE-10121    Author: Gopal V, 2015-03-27, 21:07
[HIVE-10103] LLAP: Cancelling tasks fails to stop cache filling threads - Hive - [issue]
...Running a bad query (~1Tb scan on a 1Gb cache) and killing the tasks via the container launcher fails to free up the cache filler threads.The cache filler threads with no consumers get stuck...
http://issues.apache.org/jira/browse/HIVE-10103    Author: Gopal V, 2015-03-26, 21:04
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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