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ASF GitHub Bot commented on FLINK-7856: --------------------------------------- Github user tillrohrmann commented on a diff in the pull request: https://github.com/apache/flink/pull/5397#discussion_r165290983 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java --- @@ -358,6 +361,18 @@ public void start() throws Exception { } } + @Override + public CompletableFuture<Optional<OperatorBackPressureStats>> getOperatorBackPressureStats( --- End diff -- I think `Optional` is not serializable. We should always return serializable objects as the result of a RPC. > Port JobVertexBackPressureHandler to REST endpoint > -------------------------------------------------- > > Key: FLINK-7856 > URL: https://issues.apache.org/jira/browse/FLINK-7856 > Project: Flink > Issue Type: Sub-task > Components: Distributed Coordination, REST, Webfrontend > Reporter: Fang Yong > Assignee: Gary Yao > Priority: Major > > Port JobVertexBackPressureHandler to REST endpoint -- This message was sent by Atlassian JIRA (v7.6.3#76005)