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https://issues.apache.org/jira/browse/FLINK-10234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16618997#comment-16618997
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ASF GitHub Bot commented on FLINK-10234:
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StefanRRichter commented on issue #6652: [FLINK-10234][runtime] Fix ambiguous
lambda usage
URL: https://github.com/apache/flink/pull/6652#issuecomment-422362123
LGTM 👍
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> Lambda usage in FutureUtils is ambigouos with Java 9
> ----------------------------------------------------
>
> Key: FLINK-10234
> URL: https://issues.apache.org/jira/browse/FLINK-10234
> Project: Flink
> Issue Type: Sub-task
> Components: Core
> Affects Versions: 1.7.0
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.7.0
>
>
> In {{FutureUtils}} the following code doesn't compile with java 9:
> {code}
> ... = scheduledExecutor.schedule(
> () -> retryOperationWithDelay(resultFuture, operation, retries - 1,
> retryDelay,
> ...,
> ...,
> ...);
> {code}
> The reason is that the compiler cannot determine whether the lambda should be
> a {{Runnable}} or a {{Callable<V>}}, resulting in incompatible bounds for the
> return type.
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