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https://issues.apache.org/jira/browse/HIVE-20797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16703004#comment-16703004
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Peter Vary commented on HIVE-20797:
-----------------------------------
[~belugabehr]: Could we do this without MoreObjects? :)
{code:java}
final List<HiveLock> locks = ctx.getHiveLocks();
LOG.info("Operation {} obtained {} locks", plan.getOperation(),
locks!=null?locks.size():0);{code}
Thanks,
Peter
> Print Number of Locks Acquired
> ------------------------------
>
> Key: HIVE-20797
> URL: https://issues.apache.org/jira/browse/HIVE-20797
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2, Locking
> Affects Versions: 4.0.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Labels: newbie, noob
> Attachments: HIVE-20797.1.patch
>
>
> The number of locks acquired by a query can greatly influence the performance
> and stability of the system, especially for ZK locks. Please add INFO level
> logging with the number of locks each query obtains.
> Log here:
> https://github.com/apache/hive/blob/3963c729fabf90009cb67d277d40fe5913936358/ql/src/java/org/apache/hadoop/hive/ql/Driver.java#L1670-L1672
> {quote}
> A list of acquired locks will be stored in the
> org.apache.hadoop.hive.ql.Context object and can be retrieved via
> org.apache.hadoop.hive.ql.Context#getHiveLocks.
> {quote}
> https://github.com/apache/hive/blob/758ff449099065a84c46d63f9418201c8a6731b1/ql/src/java/org/apache/hadoop/hive/ql/lockmgr/HiveTxnManager.java#L115-L127
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