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https://issues.apache.org/jira/browse/FLINK-7876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16224642#comment-16224642
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ASF GitHub Bot commented on FLINK-7876:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4872#discussion_r147654224
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/operators/testutils/UnregisteredTaskMetricsGroup.java
---
@@ -28,15 +28,15 @@
import org.apache.flink.runtime.metrics.groups.TaskManagerJobMetricGroup;
import org.apache.flink.runtime.metrics.groups.TaskManagerMetricGroup;
import org.apache.flink.runtime.metrics.groups.TaskMetricGroup;
-import org.apache.flink.runtime.metrics.MetricRegistry;
+import org.apache.flink.runtime.metrics.MetricRegistryImpl;
import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import java.util.UUID;
public class UnregisteredTaskMetricsGroup extends TaskMetricGroup {
- private static final MetricRegistry EMPTY_REGISTRY = new
MetricRegistry(MetricRegistryConfiguration.defaultMetricRegistryConfiguration());
+ private static final MetricRegistryImpl EMPTY_REGISTRY = new
MetricRegistryImpl(MetricRegistryConfiguration.defaultMetricRegistryConfiguration());
--- End diff --
This could be a no-op registry.
> Register TaskManagerMetricGroup under ResourceID instead of InstanceID
> ----------------------------------------------------------------------
>
> Key: FLINK-7876
> URL: https://issues.apache.org/jira/browse/FLINK-7876
> Project: Flink
> Issue Type: Improvement
> Components: Metrics
> Affects Versions: 1.4.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Priority: Minor
> Labels: flip-6
>
> Currently, the {{TaskManager}} registers the {{TaskManagerMetricGroup}} under
> its {{InstanceID}} and thereby binding its metrics effectively to the
> lifetime of its registration with the {{JobManager}}. This has also
> implications how the REST handler retrieve the TaskManager metrics, namely by
> its {{InstanceID}}.
> I would actually propose to register the {{TaskManagerMetricGroup}} under the
> {{TaskManager}}/{{TaskExecutor}} {{ResourceID}} which is valid over the whole
> lifetime of the {{TaskManager}}/{{TaskExecutor}}. That way we would also be
> able to query metrics independent of the connection status to the
> {{JobManager}}.
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