Reporting of (seemingly inconsequential) transport exception has major impact
on performance
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Key: HIVE-1816
URL: https://issues.apache.org/jira/browse/HIVE-1816
Project: Hive
Issue Type: Improvement
Components: Drivers
Affects Versions: 0.5.0
Environment: Custom Java application using the Hive JDBC driver to
connect to a Hive server, execute a Hive query and process the results.
Reporter: Guy le Mar
Priority: Minor
During the process of executing a hive query and then fetching the results, the
following stack track is continually output to seterr.
For the query I executed, 47Mb of this text was generated. As a consequence,
the performance of the application itself suffered.
(Redirecting stderr to file halved the time it took my application to fetch the
results - from 2 minutes down to 70 sec.)
Note, this also occurs if you use an application such as SQuirrel SQL
(http://www.squirrelsql.org) to execute a Hive query using the Hive JDBC driver.
The stack trace that is repeatedly reported is...
org.apache.thrift.transport.TTransportException
at
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:132)
at
org.apache.hadoop.hive.serde2.thrift.TCTLSeparatedProtocol$SimpleTransportTokenizer.fillTokenizer(TCTLSeparatedProtocol.java:215)
at
org.apache.hadoop.hive.serde2.thrift.TCTLSeparatedProtocol$SimpleTransportTokenizer.<init>(TCTLSeparatedProtocol.java:210)
at
org.apache.hadoop.hive.serde2.thrift.TCTLSeparatedProtocol.internalInitialize(TCTLSeparatedProtocol.java:336)
at
org.apache.hadoop.hive.serde2.thrift.TCTLSeparatedProtocol.initialize(TCTLSeparatedProtocol.java:417)
at
org.apache.hadoop.hive.serde2.dynamic_type.DynamicSerDe.initialize(DynamicSerDe.java:94)
at
org.apache.hadoop.hive.jdbc.HiveResultSet.initDynamicSerde(HiveResultSet.java:117)
at
org.apache.hadoop.hive.jdbc.HiveResultSet.<init>(HiveResultSet.java:74)
at
org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:178)
at com.quest.orahive.HiveJdbcClient.main(HiveJdbcClient.java:117)
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