Shixiong Zhu created SPARK-1934:
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Summary: "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
Priority: Minor
`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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