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https://issues.apache.org/jira/browse/FLINK-7265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16101711#comment-16101711
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ASF GitHub Bot commented on FLINK-7265:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4397#discussion_r129575803
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/fs/hdfs/HdfsKindTest.java
---
@@ -0,0 +1,59 @@
+/*
+ * 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.fs.hdfs;
+
+import org.apache.flink.core.fs.FileSystem;
+import org.apache.flink.core.fs.FileSystemKind;
+import org.apache.flink.core.fs.Path;
+
+import org.junit.Test;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+
+public class HdfsKindTest {
--- End diff --
This class will need a javadoc after a rebase (for master).
> FileSystems should describe their kind and consistency level
> ------------------------------------------------------------
>
> Key: FLINK-7265
> URL: https://issues.apache.org/jira/browse/FLINK-7265
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.3.1
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Fix For: 1.4.0, 1.3.2
>
>
> Currently, all {{FileSystem}} types look the same to Flink.
> However, certain operations should only be executed on certain kinds of file
> systems.
> For example, it makes no sense to attempt to delete an empty parent directory
> on S3, because there are no such thinks as directories, only hierarchical
> naming in the keys (file names).
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