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https://issues.apache.org/jira/browse/FLINK-8268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16308137#comment-16308137
]
ASF GitHub Bot commented on FLINK-8268:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5193#discussion_r159220879
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/api/functions/sink/ContentDump.java
---
@@ -0,0 +1,134 @@
+/*
+ * 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.api.functions.sink;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static org.apache.flink.util.Preconditions.checkArgument;
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
+
+/**
+ * Utility class to simulate in memory file like writes, flushes and
closing.
+ */
+public class ContentDump {
+ private boolean writable = true;
+ private Map<String, List<String>> filesContent = new HashMap<>();
+
+ public Set<String> listFiles() {
+ return filesContent.keySet();
+ }
+
+ public void setWritable(boolean writable) {
+ this.writable = writable;
+ }
+
+ /**
+ * Creates an empty file.
+ */
+ public ContentWriter createWriter(String name) {
+ checkArgument(!filesContent.containsKey(name), "File [%s]
already exists", name);
+ filesContent.put(name, new ArrayList<>());
+ return new ContentWriter(name, this);
+ }
+
+ public static void move(String name, ContentDump source, ContentDump
target) {
+ Collection<String> content = source.read(name);
+ try (ContentWriter contentWriter = target.createWriter(name)) {
+ contentWriter.write(content).flush();
+ }
+ source.delete(name);
+ }
+
+ public void delete(String name) {
+ filesContent.remove(name);
+ }
+
+ public Collection<String> read(String name) {
+ List<String> content = filesContent.get(name);
+ checkState(content != null, "Unknown file [%s]", name);
+ List<String> result = new ArrayList<>(content);
+ content.clear();
--- End diff --
Hmm, I was thinking more in a manner of reading from a file descriptor,
where subsequent reads return only new data. But now when I think about it,
that would be more expected behaviour for some `ContentReader` class and
dropping `content.clear()` here makes more sense.
> Test instability for 'TwoPhaseCommitSinkFunctionTest'
> -----------------------------------------------------
>
> Key: FLINK-8268
> URL: https://issues.apache.org/jira/browse/FLINK-8268
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.5.0
> Reporter: Stephan Ewen
> Assignee: Piotr Nowojski
> Priority: Critical
> Labels: test-stability
>
> The following exception / failure message occurs.
> {code}
> Tests run: 5, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.824 sec <<<
> FAILURE! - in
> org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunctionTest
> testIgnoreCommitExceptionDuringRecovery(org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunctionTest)
> Time elapsed: 0.068 sec <<< ERROR!
> java.lang.Exception: Could not complete snapshot 0 for operator MockTask
> (1/1).
> at java.io.FileOutputStream.writeBytes(Native Method)
> at java.io.FileOutputStream.write(FileOutputStream.java:326)
> at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
> at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
> at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295)
> at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
> at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
> at java.io.BufferedWriter.flush(BufferedWriter.java:254)
> at
> org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunctionTest$FileBasedSinkFunction.preCommit(TwoPhaseCommitSinkFunctionTest.java:313)
> at
> org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunctionTest$FileBasedSinkFunction.preCommit(TwoPhaseCommitSinkFunctionTest.java:288)
> at
> org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction.snapshotState(TwoPhaseCommitSinkFunction.java:290)
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.trySnapshotFunctionState(StreamingFunctionUtils.java:118)
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.snapshotFunctionState(StreamingFunctionUtils.java:99)
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotState(AbstractUdfStreamOperator.java:90)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:357)
> at
> org.apache.flink.streaming.util.AbstractStreamOperatorTestHarness.snapshot(AbstractStreamOperatorTestHarness.java:459)
> at
> org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunctionTest.testIgnoreCommitExceptionDuringRecovery(TwoPhaseCommitSinkFunctionTest.java:208)
> {code}
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