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https://issues.apache.org/jira/browse/FLINK-10887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687911#comment-16687911
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ASF GitHub Bot commented on FLINK-10887:
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aljoscha commented on a change in pull request #7099: [FLINK-10887] [jobmaster]
Add source watermark tracking to the JobMaster
URL: https://github.com/apache/flink/pull/7099#discussion_r233811969
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/watermark/SourceWatermark.java
##########
@@ -0,0 +1,68 @@
+/*
+ * 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.watermark;
+
+import java.io.Serializable;
+
+/**
+ * This represents the watermark for a single source partition.
+ */
+public class SourceWatermark implements Serializable {
Review comment:
One problem is that there is already a `Watermark` class, but I agree with
Thomas' comment. In the future, not all "sources" might be actual physical
sources in the pipeline.
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> Add source watermark tracking to the JobMaster
> ----------------------------------------------
>
> Key: FLINK-10887
> URL: https://issues.apache.org/jira/browse/FLINK-10887
> Project: Flink
> Issue Type: Sub-task
> Components: JobManager
> Reporter: Jamie Grier
> Assignee: Jamie Grier
> Priority: Major
> Labels: pull-request-available
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> We need to add a new RPC to the JobMaster such that the current watermark for
> every source sub-task can be reported and the current global minimum/maximum
> watermark can be retrieved so that each source can adjust their partition
> read rates in an attempt to keep sources roughly aligned in event time.
>
>
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