/**
* 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 java.io.OutputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.profiling.DFSWriteProfilingData;
import org.apache.hadoop.io.WriteOptions;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestSlowWritePacketLogging {
private static Configuration conf;
private static MiniDFSCluster cluster;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
conf = new Configuration();
cluster = new MiniDFSCluster(conf, 3, true, null);
}
@AfterClass
public static void tearDownAfterClass() throws Exception {
cluster.shutdown();
}
@Test
/**
* This test just triggers the codepath and doesn't do any other verification.
*/
public void testSlowWritePacketLogging() throws Exception {
DistributedFileSystem fs = (DistributedFileSystem) cluster.getFileSystem();
WriteOptions options = new WriteOptions();
options.setLogSlowWriteProfileDataThreshold(1);
DFSWriteProfilingData data = new DFSWriteProfilingData();
DFSClient.setProfileDataForNextOutputStream(data);
OutputStream out = fs.create(new Path("/test"), null, true, 4096,
(short) 3, 1024, 512, null, null, options);
byte[] buffer = new byte[1024 * 1024];
out.write(buffer);
out.close();
}
}