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https://issues.apache.org/jira/browse/SPARK-9968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tathagata Das resolved SPARK-9968.
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Resolution: Fixed
Fix Version/s: 1.5.0
> BlockGenerator lock structure can cause lock starvation of the block updating
> thread
> ------------------------------------------------------------------------------------
>
> Key: SPARK-9968
> URL: https://issues.apache.org/jira/browse/SPARK-9968
> Project: Spark
> Issue Type: Sub-task
> Components: Streaming
> Reporter: Tathagata Das
> Assignee: Tathagata Das
> Fix For: 1.5.0
>
>
> When the rate limiter is actually limiting the rate at which data is inserted
> into the buffer, the synchronized block of BlockGenerator.addData stays
> blocked for long time. This causes the thread switching the buffer and
> generating blocks (synchronized with addData) to starve and not generate
> blocks for seconds. The correct solution is to not block on the rate limiter
> within the synchronized block for adding data to the buffer.
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