[IMPALA-3029] Global filters may arrive before registration, causing crash

• Type: Improvement
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 2.5.0
• Fix Version/s: Impala 2.5.0
• Component/s: Distributed Exec
• Labels: runtime-filters
• Target Version: Impala 2.5.0
• Assignee: Henry Robinson
• Reporter: Henry Robinson
• Created: 18/Feb/16 23:16
• Updated: 22/Feb/16 06:20
• Resolved: 22/Feb/16 06:20

Description

If a fragment produces its filter very quickly, it may call FragmentExecState::PublishFilter() before FragmentExecState::Prepare() has completed. This can cause a crash as RuntimeFilterBank::PublishGlobalFilter() expects that the filters have all been registered before publication.

The fix is to introduce a mechanism to wait for Prepare() to finish.