Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2146#discussion_r68071111
--- Diff:
flink-runtime/src/main/scala/org/apache/flink/runtime/jobmanager/JobManager.scala
---
@@ -149,6 +154,9 @@ class JobManager(
var leaderSessionID: Option[UUID] = None
+ private var metricsRegistry : FlinkMetricRegistry = _
+ private var jobManagerMetricGroup : JobManagerMetricGroup = _
--- End diff --
i know about Options but @StephanEwen changed it.
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