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* 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.server.namenode.ha;
import static org.junit.Assert.assertEquals;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.tools.DFSck;
import org.apache.hadoop.util.ToolRunner;
import org.junit.Test;
public class TestHAAppend {
/**
* Test to verify the processing of PendingDataNodeMessageQueue in case of
* append. One block will marked as corrupt if the OP_ADD, OP_UPDATE_BLOCKS
* comes in one edit log segment and OP_CLOSE edit comes in next log segment
* which is loaded during failover. Regression test for HDFS-3605.
*/
@Test
public void testMultipleAppendsDuringCatchupTailing() throws Exception {
Configuration conf = new Configuration();
// Set a length edits tailing period, and explicit rolling, so we can
// control the ingest of edits by the standby for this test.
conf.set(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, "5000");
conf.setInt(DFSConfigKeys.DFS_HA_LOGROLL_PERIOD_KEY, -1);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.nnTopology(MiniDFSNNTopology.simpleHATopology())
.numDataNodes(3).build();
FileSystem fs = null;
try {
cluster.transitionToActive(0);
fs = HATestUtil.configureFailoverFs(cluster, conf);
Path fileToAppend = new Path("/FileToAppend");
// Create file, write some data, and hflush so that the first
// block is in the edit log prior to roll.
FSDataOutputStream out = fs.create(fileToAppend);
out.writeBytes("/data");
out.hflush();
// Let the StandbyNode catch the creation of the file.
cluster.getNameNode(0).getRpcServer().rollEditLog();
cluster.getNameNode(1).getNamesystem().getEditLogTailer().doTailEdits();
out.close();
// Append and re-close a few time, so that many block entries are queued.
for (int i = 0; i < 5; i++) {
DFSTestUtil.appendFile(fs, fileToAppend, "data");
}
// Ensure that blocks have been reported to the SBN ahead of the edits
// arriving.
cluster.triggerBlockReports();
// Failover the current standby to active.
cluster.shutdownNameNode(0);
cluster.transitionToActive(1);
// Check the FSCK doesn't detect any bad blocks on the SBN.
int rc = ToolRunner.run(new DFSck(cluster.getConfiguration(1)),
new String[] { "/", "-files", "-blocks" });
assertEquals(0, rc);
assertEquals("CorruptBlocks should be empty.", 0, cluster.getNameNode(1)
.getNamesystem().getCorruptReplicaBlocks());
} finally {
if (null != cluster) {
cluster.shutdown();
}
if (null != fs) {
fs.close();
}
}
}
}