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https://issues.apache.org/jira/browse/SPARK-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell resolved SPARK-1934.
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Resolution: Fixed
Fix Version/s: 1.3.0
Assignee: Sean Owen
> "this" reference escape to "selectorThread" during construction in
> ConnectionManager
> ------------------------------------------------------------------------------------
>
> Key: SPARK-1934
> URL: https://issues.apache.org/jira/browse/SPARK-1934
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: Shixiong Zhu
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 1.3.0
>
>
> `selectorThread` starts in the construction of
> `org.apache.spark.network.ConnectionManager`, which may cause
> `writeRunnableStarted` and `readRunnableStarted` are uninitialized before
> them are used.
> Indirectly, `BlockManager.this` also escape since it calls `new
> ConnectionManager(...)` and will be used in some threads of
> `ConnectionManager`. Some threads may view an uninitialized `BlockManager`.
> In summary, it's dangerous and hard to analyse the correctness of
> concurrency. Such escape should be avoided.
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