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https://issues.apache.org/jira/browse/FLINK-9366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500017#comment-16500017
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ASF GitHub Bot commented on FLINK-9366:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/6107#discussion_r192695040
--- Diff:
flink-fs-tests/src/test/java/org/apache/flink/hdfstests/DistributedCacheDfsTest.java
---
@@ -0,0 +1,160 @@
+/*
+ * 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.hdfstests;
+
+import org.apache.flink.api.common.functions.RichMapFunction;
+import org.apache.flink.core.fs.FileStatus;
+import org.apache.flink.core.fs.FileSystem;
+import org.apache.flink.core.fs.Path;
+import
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.test.util.MiniClusterResource;
+import org.apache.flink.util.NetUtils;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.net.URI;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for distributing files with {@link
org.apache.flink.api.common.cache.DistributedCache} via HDFS.
+ */
+public class DistributedCacheDfsTest {
+
+ private static final String testFileContent = "Goethe - Faust: Der
Tragoedie erster Teil\n" + "Prolog im Himmel.\n"
+ + "Der Herr. Die himmlischen Heerscharen. Nachher
Mephistopheles. Die drei\n" + "Erzengel treten vor.\n"
+ + "RAPHAEL: Die Sonne toent, nach alter Weise, In
Brudersphaeren Wettgesang,\n"
+ + "Und ihre vorgeschriebne Reise Vollendet sie mit Donnergang.
Ihr Anblick\n"
+ + "gibt den Engeln Staerke, Wenn keiner Sie ergruenden mag; die
unbegreiflich\n"
+ + "hohen Werke Sind herrlich wie am ersten Tag.\n"
+ + "GABRIEL: Und schnell und unbegreiflich schnelle Dreht sich
umher der Erde\n"
+ + "Pracht; Es wechselt Paradieseshelle Mit tiefer,
schauervoller Nacht. Es\n"
+ + "schaeumt das Meer in breiten Fluessen Am tiefen Grund der
Felsen auf, Und\n"
+ + "Fels und Meer wird fortgerissen Im ewig schnellem
Sphaerenlauf.\n"
+ + "MICHAEL: Und Stuerme brausen um die Wette Vom Meer aufs
Land, vom Land\n"
+ + "aufs Meer, und bilden wuetend eine Kette Der tiefsten
Wirkung rings umher.\n"
+ + "Da flammt ein blitzendes Verheeren Dem Pfade vor des
Donnerschlags. Doch\n"
+ + "deine Boten, Herr, verehren Das sanfte Wandeln deines Tags.";
+
+ @ClassRule
+ public static TemporaryFolder tempFolder = new TemporaryFolder();
--- End diff --
can be final.
> Distribute Cache only works for client-accessible files
> -------------------------------------------------------
>
> Key: FLINK-9366
> URL: https://issues.apache.org/jira/browse/FLINK-9366
> Project: Flink
> Issue Type: Bug
> Components: Client, Local Runtime
> Affects Versions: 1.6.0
> Reporter: Chesnay Schepler
> Assignee: Dawid Wysakowicz
> Priority: Blocker
> Fix For: 1.6.0
>
>
> In FLINK-8620 the distributed cache was modified to the distribute files via
> the blob store, instead of downloading them from a distributed filesystem.
> Previously, taskmanagers would download requested files from the DFS. Now,
> they retrieve it form the blob store. This requires the client to
> preemptively upload all files used with distributed cache.
> As a result it is no longer possible to use the distributed cache for files
> that reside in a cluster-internal DFS, as the client cannot download it. This
> is a regression from the previous behavior and may break existing setups.
> [~aljoscha] [~dawidwys]
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