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From GitBox <...@apache.org>
Subject [GitHub] [hadoop] noslowerdna commented on a change in pull request #666: HADOOP-16221 add option to fail operation on metadata write failure
Date Mon, 01 Apr 2019 21:54:17 GMT
noslowerdna commented on a change in pull request #666: HADOOP-16221 add option to fail operation
on metadata write failure
URL: https://github.com/apache/hadoop/pull/666#discussion_r271065618

 File path: hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/MetadataPersistenceExceptionTest.java
 @@ -0,0 +1,84 @@
+ * 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.hadoop.fs.s3a;
+import static org.apache.hadoop.test.LambdaTestUtils.intercept;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doThrow;
+import java.io.IOException;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.s3a.s3guard.MetadataStore;
+import org.apache.hadoop.fs.s3a.s3guard.PathMetadata;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+ * Tests failed writes to metadata store generate the expected
+ * MetadataPersistenceException.
+ */
+public class MetadataPersistenceExceptionTest extends AbstractS3ATestBase {
+  private S3AFileSystem fs;
+  private MetadataStore originalMetadataStore;
+  private IOException ioException;
+  @Override
+  protected Configuration createConfiguration() {
+    Configuration conf = super.createConfiguration();
+    conf.set(Constants.FAIL_ON_METADATA_WRITE_ERROR, Boolean.toString(true));
 Review comment:
   add another test where the only difference is that this is flipped to false (or never set
since that's the default), that verifies no MetadataPersistenceException is thrown

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