HDFS-12541. Extend TestSafeModeWithStripedFile with a random EC policy. Contributed by Takanobu Asanuma.

(cherry picked from commit 793820823325e390bb671f4cc1b3bc6920bba5de)

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSafeModeWithStripedFile.java

@@ -42,13 +42,12 @@ import static org.junit.Assert.assertTrue;
 
 public class TestSafeModeWithStripedFile {
 
-  private final ErasureCodingPolicy ecPolicy =
-      StripedFileTestUtil.getDefaultECPolicy();
-  private final short dataBlocks = (short) ecPolicy.getNumDataUnits();
-  private final short parityBlocks = (short) ecPolicy.getNumParityUnits();
-  private final int numDNs = dataBlocks + parityBlocks;
-  private final int cellSize = ecPolicy.getCellSize();
-  private final int blockSize = cellSize * 2;
+  private ErasureCodingPolicy ecPolicy;
+  private short dataBlocks;
+  private short parityBlocks;
+  private int numDNs;
+  private int cellSize;
+  private int blockSize;
 
   private MiniDFSCluster cluster;
   private Configuration conf;
@@ -56,17 +55,27 @@ public class TestSafeModeWithStripedFile {
   @Rule
   public Timeout globalTimeout = new Timeout(300000);
 
+  public ErasureCodingPolicy getEcPolicy() {
+    return StripedFileTestUtil.getDefaultECPolicy();
+  }
+
   @Before
   public void setup() throws IOException {
+    ecPolicy = getEcPolicy();
+    dataBlocks = (short) ecPolicy.getNumDataUnits();
+    parityBlocks = (short) ecPolicy.getNumParityUnits();
+    numDNs = dataBlocks + parityBlocks;
+    cellSize = ecPolicy.getCellSize();
+    blockSize = cellSize * 2;
+
     conf = new HdfsConfiguration();
     conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, blockSize);
     conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 100);
     cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build();
+    cluster.getFileSystem().enableErasureCodingPolicy(getEcPolicy().getName());
     cluster.getFileSystem().getClient().setErasureCodingPolicy("/",
-        StripedFileTestUtil.getDefaultECPolicy().getName());
+        getEcPolicy().getName());
     cluster.waitActive();
-    cluster.getFileSystem().enableErasureCodingPolicy(
-        StripedFileTestUtil.getDefaultECPolicy().getName());
   }
 
   @After

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSafeModeWithStripedFileWithRandomECPolicy.java

@@ -0,0 +1,49 @@
+/**
+ * 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.hdfs;
+
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This test extends TestSafeModeWithStripedFile to use a random
+ * (non-default) EC policy.
+ */
+public class TestSafeModeWithStripedFileWithRandomECPolicy extends
+    TestSafeModeWithStripedFile {
+  private static final Logger LOG = LoggerFactory.getLogger(
+      TestSafeModeWithStripedFileWithRandomECPolicy.class);
+
+  private ErasureCodingPolicy ecPolicy;
+
+  public TestSafeModeWithStripedFileWithRandomECPolicy() {
+    // If you want to debug this test with a specific ec policy, please use
+    // SystemErasureCodingPolicies class.
+    // e.g. ecPolicy = SystemErasureCodingPolicies.getByID(RS_3_2_POLICY_ID);
+    ecPolicy = StripedFileTestUtil.getRandomNonDefaultECPolicy();
+    LOG.info("run {} with {}.",
+        TestSafeModeWithStripedFileWithRandomECPolicy.class
+            .getSuperclass().getSimpleName(), ecPolicy.getName());
+  }
+
+  @Override
+  public ErasureCodingPolicy getEcPolicy() {
+    return ecPolicy;
+  }
+}