Shixiong Zhu created SPARK-18729:
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Summary: MemorySink should not call DataFrame.collect when holding
a lock
Key: SPARK-18729
URL: https://issues.apache.org/jira/browse/SPARK-18729
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Reporter: Shixiong Zhu
Assignee: Shixiong Zhu
Otherwise, other threads cannot query the content in MemorySink when
`DataFrame.collect` takes long time to finish.
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