Peter Slawski created HIVE-13512:
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Summary: Make initializing dag ids in TezWork thread safe for
parallel compilation
Key: HIVE-13512
URL: https://issues.apache.org/jira/browse/HIVE-13512
Project: Hive
Issue Type: Bug
Components: HiveServer2, Query Planning
Affects Versions: 2.0.0
Reporter: Peter Slawski
Assignee: Peter Slawski
Priority: Minor
When parallel query compilation is enabled, it is possible for concurrent
running threads to create TezWork objects that have the same dag id. This is
because the counter used to obtain the next dag id is not thread safe. The
counter should be an AtomicInteger rather than an int.
{code:java}
private static int counter;
...
public TezWork(String queryId, Configuration conf) {
this.dagId = queryId + ":" + (++counter);
...
}
{code}
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