## What is the purpose of the change This PR fixes a jdk9 incompatibility caused by lambdas. The problem 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.
[ Full content available at: https://github.com/apache/flink/pull/6652 ] This message was relayed via gitbox.apache.org for [email protected]
