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https://issues.apache.org/jira/browse/FLINK-9295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16471789#comment-16471789
]
ASF GitHub Bot commented on FLINK-9295:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5977#discussion_r187592761
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/util/MockStreamConfig.java
---
@@ -0,0 +1,35 @@
+/*
+ * 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.streaming.util;
+
+import org.apache.flink.api.common.typeutils.base.IntSerializer;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.runtime.jobgraph.OperatorID;
+import org.apache.flink.streaming.api.graph.StreamConfig;
+
+/**
+ * Handy mock for {@link StreamConfig}.
+ */
+public class MockStreamConfig extends StreamConfig {
+ public MockStreamConfig() {
+ super(new Configuration());
+
+ setTypeSerializerIn1(IntSerializer.INSTANCE);
--- End diff --
Good point, fixed.
> FlinkKafkaProducer011 sometimes throws ProducerFencedExceptions when in
> EXACTLY_ONCE mode
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-9295
> URL: https://issues.apache.org/jira/browse/FLINK-9295
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector
> Affects Versions: 1.4.2
> Reporter: Christopher Ng
> Assignee: Piotr Nowojski
> Priority: Major
> Fix For: 1.5.0
>
>
> {{FlinkKafkaProducer011}} can throw {{ProducerFencedExceptions}} if multiple
> sinks are used within the same sub-task. This can happen when
> operator-chaining results in two different sinks in the same topology being
> chained into a task, and thus into each of its sub-tasks.
> The problem is that {{TransactionIdsGenerator}} only takes into account the
> task name, the subtask index, the number of subtasks, and a couple of other
> things. All the attributes are the same between different
> {{FlinkKafkaProducer011s}} within the same sub-task, so they get the same
> transaction ids and one of them ends up failing.
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