Tim Armstrong created IMPALA-9274:
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Summary: Implement phased barrier synchronisation construct
Key: IMPALA-9274
URL: https://issues.apache.org/jira/browse/IMPALA-9274
Project: IMPALA
Issue Type: Sub-task
Reporter: Tim Armstrong
We need a synchronisation primitive that allows n threads to synchronise by
joining on a barrier, then having the last arriving thread execute some code
and then wake up all of the other threads.
This is required for implementing phases of the hash join algorithm.
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