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https://issues.apache.org/jira/browse/FLINK-5069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15709567#comment-15709567
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ASF GitHub Bot commented on FLINK-5069:
---------------------------------------
Github user greghogan commented on a diff in the pull request:
https://github.com/apache/flink/pull/2809#discussion_r90306783
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/stats/PendingCheckpointStats.java
---
@@ -0,0 +1,187 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.checkpoint.stats;
+
+import org.apache.flink.runtime.jobgraph.JobVertexID;
+
+import java.io.Serializable;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * Statistics for a pending checkpoint.
+ */
+public class PendingCheckpointStats implements Serializable {
--- End diff --
Can this be refactored into `org.apache.flink.runtime.metrics.groups`?
> Pending checkpoint statistics gauge
> -----------------------------------
>
> Key: FLINK-5069
> URL: https://issues.apache.org/jira/browse/FLINK-5069
> Project: Flink
> Issue Type: Improvement
> Components: Metrics
> Reporter: zhuhaifeng
> Assignee: zhuhaifeng
> Priority: Minor
> Fix For: 1.2.0
>
>
> Add the statistics of pending checkpoints as a gauge metric. When the
> checkpoint appears not to be completed, this metric would help to get the
> state of a pending checkpoint , e.g which task did not complete the
> checkpoint.
> The statistic will be as the follows：
> checkpointID,
> Number Of Acknowledged Tasks,
> Number Of Not yet Acknowledged Tasks,
> The detail of not yet acknowledged JobVertexID, taskID
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