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Posted to issues@spark.apache.org by "Patrick Wendell (JIRA)" <ji...@apache.org> on 2015/01/28 21:45:34 UTC
[jira] [Resolved] (SPARK-1934) "this" reference escape to
"selectorThread" during construction in ConnectionManager
[ https://issues.apache.org/jira/browse/SPARK-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Patrick Wendell resolved SPARK-1934.
------------------------------------
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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