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https://issues.apache.org/jira/browse/SPARK-33352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-33352.
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Fix Version/s: 3.1.0
Resolution: Fixed
Issue resolved by pull request 30255
[https://github.com/apache/spark/pull/30255]
> Fix procedure-like declaration compilation warning in Scala 2.13
> ----------------------------------------------------------------
>
> Key: SPARK-33352
> URL: https://issues.apache.org/jira/browse/SPARK-33352
> Project: Spark
> Issue Type: Sub-task
> Components: Build
> Affects Versions: 3.1.0
> Reporter: Yang Jie
> Assignee: Yang Jie
> Priority: Minor
> Fix For: 3.1.0
>
>
> Similar to spark-29291, just to track Spark 3.1.0.
> There are two similar compilation warnings about procedure-like declaration
> in Scala 2.13.3:
>
> {code:java}
> [WARNING] [Warn]
> /spark/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala:70:
> procedure syntax is deprecated for constructors: add `=`, as in method
> definition
> [WARNING] [Warn]
> /spark/core/src/main/scala/org/apache/spark/storage/BlockManagerDecommissioner.scala:211:
> procedure syntax is deprecated: instead, add `: Unit =` to explicitly
> declare `run`'s return type
> {code}
>
> For constructors method definition should be `this(...) = \{ }` not
> `this(...) \{ }`, for without
> `return type` methods definition should be `def methodName(...): Unit = {}`
> not `def methodName(...) {}`
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