[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | package org.apache.hadoop.fs; |
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| 19 | |
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| 20 | import junit.framework.TestCase; |
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| 21 | import java.io.*; |
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| 22 | import org.apache.hadoop.conf.Configuration; |
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| 23 | import org.apache.hadoop.fs.FSDataInputStream; |
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| 24 | import org.apache.hadoop.fs.FileSystem; |
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| 25 | import org.apache.hadoop.fs.LocalFileSystem; |
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| 26 | import org.apache.hadoop.fs.Path; |
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| 27 | import org.apache.hadoop.util.StringUtils; |
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| 28 | |
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| 29 | /** |
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| 30 | * test for the input truncation bug when mark/reset is used. |
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| 31 | * HADOOP-1489 |
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| 32 | */ |
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| 33 | public class TestTruncatedInputBug extends TestCase { |
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| 34 | private static String TEST_ROOT_DIR = |
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| 35 | new Path(System.getProperty("test.build.data","/tmp")) |
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| 36 | .toString().replace(' ', '+'); |
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| 37 | |
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| 38 | private void writeFile(FileSystem fileSys, |
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| 39 | Path name, int nBytesToWrite) |
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| 40 | throws IOException { |
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| 41 | DataOutputStream out = fileSys.create(name); |
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| 42 | for (int i = 0; i < nBytesToWrite; ++i) { |
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| 43 | out.writeByte(0); |
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| 44 | } |
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| 45 | out.close(); |
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| 46 | } |
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| 47 | |
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| 48 | /** |
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| 49 | * When mark() is used on BufferedInputStream, the request |
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| 50 | * size on the checksum file system can be small. However, |
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| 51 | * checksum file system currently depends on the request size |
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| 52 | * >= bytesPerSum to work properly. |
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| 53 | */ |
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| 54 | public void testTruncatedInputBug() throws IOException { |
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| 55 | final int ioBufSize = 512; |
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| 56 | final int fileSize = ioBufSize*4; |
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| 57 | int filePos = 0; |
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| 58 | |
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| 59 | Configuration conf = new Configuration(); |
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| 60 | conf.setInt("io.file.buffer.size", ioBufSize); |
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| 61 | FileSystem fileSys = FileSystem.getLocal(conf); |
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| 62 | |
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| 63 | try { |
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| 64 | // First create a test input file. |
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| 65 | Path testFile = new Path(TEST_ROOT_DIR, "HADOOP-1489"); |
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| 66 | writeFile(fileSys, testFile, fileSize); |
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| 67 | assertTrue(fileSys.exists(testFile)); |
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| 68 | assertTrue(fileSys.getLength(testFile) == fileSize); |
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| 69 | |
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| 70 | // Now read the file for ioBufSize bytes |
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| 71 | FSDataInputStream in = fileSys.open(testFile, ioBufSize); |
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| 72 | // seek beyond data buffered by open |
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| 73 | filePos += ioBufSize * 2 + (ioBufSize - 10); |
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| 74 | in.seek(filePos); |
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| 75 | |
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| 76 | // read 4 more bytes before marking |
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| 77 | for (int i = 0; i < 4; ++i) { |
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| 78 | if (in.read() == -1) { |
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| 79 | break; |
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| 80 | } |
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| 81 | ++filePos; |
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| 82 | } |
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| 83 | |
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| 84 | // Now set mark() to trigger the bug |
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| 85 | // NOTE: in the fixed code, mark() does nothing (not supported) and |
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| 86 | // hence won't trigger this bug. |
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| 87 | in.mark(1); |
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| 88 | System.out.println("MARKED"); |
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| 89 | |
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| 90 | // Try to read the rest |
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| 91 | while (filePos < fileSize) { |
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| 92 | if (in.read() == -1) { |
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| 93 | break; |
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| 94 | } |
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| 95 | ++filePos; |
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| 96 | } |
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| 97 | in.close(); |
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| 98 | |
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| 99 | System.out.println("Read " + filePos + " bytes." |
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| 100 | + " file size=" + fileSize); |
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| 101 | assertTrue(filePos == fileSize); |
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| 102 | |
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| 103 | } finally { |
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| 104 | try { |
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| 105 | fileSys.close(); |
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| 106 | } catch (Exception e) { |
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| 107 | // noop |
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| 108 | } |
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| 109 | } |
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| 110 | } // end testTruncatedInputBug |
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| 111 | } |
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