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Posted to dev@drill.apache.org by "Vlad Rozov (JIRA)" <ji...@apache.org> on 2018/05/22 17:12:00 UTC
[jira] [Created] (DRILL-6435) MappingSet is stateful, so it can't
be shared between threads
Vlad Rozov created DRILL-6435:
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Summary: MappingSet is stateful, so it can't be shared between threads
Key: DRILL-6435
URL: https://issues.apache.org/jira/browse/DRILL-6435
Project: Apache Drill
Issue Type: Bug
Reporter: Vlad Rozov
Assignee: Vlad Rozov
There are several instances where static {{MappingSet}} instances are used (for example {{NestedLoopJoinBatch}} and {{BaseSortWrapper}}). This causes instance reuse across threads when queries are executed concurrently. As {{MappingSet}} is a stateful class with visitor design pattern, such reuse causes invalid state.
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