[jira] [Updated] (SPARK-22660) Use position() and limit() to fix ambiguity issue in scala-2.12 and JDK9

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen updated SPARK-22660:
------------------------------
    Priority: Minor  (was: Major)

You don't need reflective calls here; typically you just need a cast. That kind of thing can be safely added without breaking Scala 2.11 or Java 8.
[~kellyzly] let's not keep opening JIRAs for all these types of cases. We do not support Java 9 or Scala 2.12 yet, for reasons larger than this. It's OK to future-proof or clarify the code if it doesn't break things.
But one of your proposed changes already seems to do that.

> Use position() and limit() to fix ambiguity issue in scala-2.12 and JDK9
> ------------------------------------------------------------------------
>
>                 Key: SPARK-22660
>                 URL: https://issues.apache.org/jira/browse/SPARK-22660
>             Project: Spark
>          Issue Type: Improvement
>          Components: Build
>    Affects Versions: 2.2.0
>            Reporter: liyunzhang
>            Priority: Minor
>
> Based on SPARK-22659
> 1. compile with -Pscala-2.12 and get the error
> {code}
> Use position() and limit() to fix ambiguity issue
> {code}
> spark_source/core/src/main/scala/org/apache/spark/executor/Executor.scala:455: ambiguous reference to overloaded definition, method limit in class ByteBuffer of type (x$1: Int)java.nio.ByteBuffer
> method limit in class Buffer of type ()Int
> match expected type ?
>      val resultSize = serializedDirectResult.limit
> error                                         
> {code}



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