Shixiong Zhu 15b144d2bf [SPARK-19617][SS] Fix the race condition when starting and stopping a query quickly ... ## What changes were proposed in this pull request? The streaming thread in StreamExecution uses the following ways to check if it should exit: - Catch an InterruptException. - `StreamExecution.state` is TERMINATED. When starting and stopping a query quickly, the above two checks may both fail: - Hit [HADOOP-14084](https://issues.apache.org/jira/browse/HADOOP-14084) and swallow InterruptException - StreamExecution.stop is called before `state` becomes `ACTIVE`. Then [runBatches](dcc2d540a5/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamExecution.scala (L252)) changes the state from `TERMINATED` to `ACTIVE`. If the above cases both happen, the query will hang forever. This PR changes `state` to `AtomicReference` and uses`compareAndSet` to make sure we only change the state from `INITIALIZING` to `ACTIVE`. It also removes the `runUninterruptibly` hack from ``HDFSMetadata`, because HADOOP-14084 won't cause any problem after we fix the race condition. ## How was this patch tested? Jenkins Author: Shixiong Zhu <shixiong@databricks.com> Closes #16947 from zsxwing/SPARK-19617.		2017-02-17 19:04:45 -08:00
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src	[SPARK-19617][SS] Fix the race condition when starting and stopping a query quickly	2017-02-17 19:04:45 -08:00
pom.xml	[SPARK-17807][CORE] split test-tags into test-JAR	2016-12-21 16:37:20 -08:00