| /** |
| * 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 static org.junit.Assert.assertEquals; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys; |
| import org.apache.hadoop.hdfs.client.impl.BlockReaderTestUtil; |
| import org.junit.Test; |
| |
| /** |
| * This class tests disabling client connection caching in a single node |
| * mini-cluster. |
| */ |
| public class TestDisableConnCache { |
| static final Log LOG = LogFactory.getLog(TestDisableConnCache.class); |
| |
| static final int BLOCK_SIZE = 4096; |
| static final int FILE_SIZE = 3 * BLOCK_SIZE; |
| |
| /** |
| * Test that the socket cache can be disabled by setting the capacity to |
| * 0. Regression test for HDFS-3365. |
| * @throws Exception |
| */ |
| @Test |
| public void testDisableCache() throws Exception { |
| HdfsConfiguration confWithoutCache = new HdfsConfiguration(); |
| // Configure a new instance with no peer caching, ensure that it doesn't |
| // cache anything |
| confWithoutCache.setInt( |
| HdfsClientConfigKeys.DFS_CLIENT_SOCKET_CACHE_CAPACITY_KEY, 0); |
| BlockReaderTestUtil util = new BlockReaderTestUtil(1, confWithoutCache); |
| final Path testFile = new Path("/testConnCache.dat"); |
| util.writeFile(testFile, FILE_SIZE / 1024); |
| FileSystem fsWithoutCache = FileSystem.newInstance(util.getConf()); |
| try { |
| DFSTestUtil.readFile(fsWithoutCache, testFile); |
| assertEquals(0, ((DistributedFileSystem)fsWithoutCache). |
| dfs.getClientContext().getPeerCache().size()); |
| } finally { |
| fsWithoutCache.close(); |
| util.shutdown(); |
| } |
| } |
| } |