/// <exception cref="System.IO.IOException"/> public virtual void TestInputStreamClosedTwice() { //HADOOP-4760 according to Closeable#close() closing already-closed //streams should have no effect. Org.Apache.Hadoop.FS.Path src = Path("/test/hadoop/file"); CreateFile(src); FSDataInputStream @in = fs.Open(src); @in.Close(); @in.Close(); }
public virtual void TestFallbackRead() { HdfsConfiguration conf = InitZeroCopyTest(); MiniDFSCluster cluster = null; Path TestPath = new Path("/a"); int TestFileLength = 16385; int RandomSeed = 23453; FSDataInputStream fsIn = null; DistributedFileSystem fs = null; try { cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, RandomSeed); try { DFSTestUtil.WaitReplication(fs, TestPath, (short)1); } catch (Exception e) { NUnit.Framework.Assert.Fail("unexpected InterruptedException during " + "waitReplication: " + e); } catch (TimeoutException e) { NUnit.Framework.Assert.Fail("unexpected TimeoutException during " + "waitReplication: " + e); } fsIn = fs.Open(TestPath); byte[] original = new byte[TestFileLength]; IOUtils.ReadFully(fsIn, original, 0, TestFileLength); fsIn.Close(); fsIn = fs.Open(TestPath); TestFallbackImpl(fsIn, original); } finally { if (fsIn != null) { fsIn.Close(); } if (fs != null) { fs.Close(); } if (cluster != null) { cluster.Shutdown(); } } }
/// <exception cref="System.IO.IOException"/> public override void Close() { datas.Close(); if (sums != null) { sums.Close(); } Set(fs.verifyChecksum, null, 1, 0); }
public virtual void TestBufferedFSInputStream() { Configuration conf = new Configuration(); conf.SetClass("fs.file.impl", typeof(RawLocalFileSystem), typeof(FileSystem)); conf.SetInt(CommonConfigurationKeysPublic.IoFileBufferSizeKey, 4096); FileSystem fs = FileSystem.NewInstance(conf); byte[] buf = new byte[10 * 1024]; new Random().NextBytes(buf); // Write random bytes to file FSDataOutputStream stream = fs.Create(TestPath); try { stream.Write(buf); } finally { stream.Close(); } Random r = new Random(); FSDataInputStream stm = fs.Open(TestPath); // Record the sequence of seeks and reads which trigger a failure. int[] seeks = new int[10]; int[] reads = new int[10]; try { for (int i = 0; i < 1000; i++) { int seekOff = r.Next(buf.Length); int toRead = r.Next(Math.Min(buf.Length - seekOff, 32000)); seeks[i % seeks.Length] = seekOff; reads[i % reads.Length] = toRead; VerifyRead(stm, buf, seekOff, toRead); } } catch (Exception afe) { StringBuilder sb = new StringBuilder(); sb.Append("Sequence of actions:\n"); for (int j = 0; j < seeks.Length; j++) { sb.Append("seek @ ").Append(seeks[j]).Append(" ").Append("read ").Append(reads[j ]).Append("\n"); } System.Console.Error.WriteLine(sb.ToString()); throw; } finally { stm.Close(); } }
/// <exception cref="System.IO.IOException"/> private string ReadFile(string @out) { Path path = new Path(@out); FileStatus stat = lfs.GetFileStatus(path); FSDataInputStream @in = lfs.Open(path); byte[] buffer = new byte[(int)stat.GetLen()]; @in.ReadFully(buffer); @in.Close(); lfs.Delete(path, false); return(Runtime.GetStringForBytes(buffer)); }
/// <exception cref="System.IO.IOException"/> public virtual void Map(Text key, LongWritable value, OutputCollector <K, LongWritable > collector, Reporter reporter) { string name = key.ToString(); long size = value.Get(); long seed = long.Parse(name); if (size == 0) { return; } reporter.SetStatus("opening " + name); FSDataInputStream @in = fs.Open(new Path(DataDir, name)); try { for (int i = 0; i < SeeksPerFile; i++) { // generate a random position long position = Math.Abs(random.NextLong()) % size; // seek file to that position reporter.SetStatus("seeking " + name); @in.Seek(position); byte b = @in.ReadByte(); // check that byte matches byte checkByte = 0; // advance random state to that position random.SetSeed(seed); for (int p = 0; p <= position; p += check.Length) { reporter.SetStatus("generating data for " + name); if (fastCheck) { checkByte = unchecked ((byte)random.Next(byte.MaxValue)); } else { random.NextBytes(check); checkByte = check[(int)(position % check.Length)]; } } NUnit.Framework.Assert.AreEqual(b, checkByte); } } finally { @in.Close(); } }
/// <exception cref="System.IO.IOException"/> internal static string ReadFile(FileSystem fs, Path name, int buflen) { byte[] b = new byte[buflen]; int offset = 0; FSDataInputStream @in = fs.Open(name); for (int remaining; (remaining = b.Length - offset) > 0 && (n = @in.Read(b, offset , remaining)) != -1; offset += n) { } Assert.Equal(offset, Math.Min(b.Length, @in.GetPos())); @in.Close(); string s = Runtime.GetStringForBytes(b, 0, offset); return(s); }
/// <exception cref="System.IO.IOException"/> private void VerifyFile(FileSystem fs, Path file, int bytesToVerify, byte[] expectedBytes ) { FSDataInputStream @in = fs.Open(file); try { byte[] readBuf = new byte[bytesToVerify]; @in.ReadFully(readBuf, 0, bytesToVerify); for (int i = 0; i < bytesToVerify; i++) { Assert.Equal(expectedBytes[i], readBuf[i]); } } finally { @in.Close(); } }
/// <exception cref="System.IO.IOException"/> internal override object DoIO(Reporter reporter, string name, long offset) { // open file FSDataInputStream @in = null; Path p = new Path(name); try { @in = fs.Open(p); } catch (IOException) { return(name + "@(missing)"); } @in.Seek(offset); long actualSize = 0; try { long blockSize = fs.GetDefaultBlockSize(p); reporter.SetStatus("reading " + name + "@" + offset + "/" + blockSize); for (int curSize = bufferSize; curSize == bufferSize && actualSize < blockSize; actualSize += curSize) { curSize = @in.Read(buffer, 0, bufferSize); } } catch (IOException) { Log.Info("Corrupted block detected in \"" + name + "\" at " + offset); return(name + "@" + offset); } finally { @in.Close(); } return(actualSize); }
public virtual void TestTruncatedChecksum() { Path testPath = new Path(TestRootDir, "testtruncatedcrc"); FSDataOutputStream fout = localFs.Create(testPath); fout.Write(Runtime.GetBytesForString("testing truncation")); fout.Close(); // Read in the checksum Path checksumFile = localFs.GetChecksumFile(testPath); FileSystem rawFs = localFs.GetRawFileSystem(); FSDataInputStream checksumStream = rawFs.Open(checksumFile); byte[] buf = new byte[8192]; int read = checksumStream.Read(buf, 0, buf.Length); checksumStream.Close(); // Now rewrite the checksum file with the last byte missing FSDataOutputStream replaceStream = rawFs.Create(checksumFile); replaceStream.Write(buf, 0, read - 1); replaceStream.Close(); // Now reading the file should fail with a ChecksumException try { FileSystemTestHelper.ReadFile(localFs, testPath, 1024); NUnit.Framework.Assert.Fail("Did not throw a ChecksumException when reading truncated " + "crc file"); } catch (ChecksumException) { } // telling it not to verify checksums, should avoid issue. localFs.SetVerifyChecksum(false); string str = FileSystemTestHelper.ReadFile(localFs, testPath, 1024).ToString(); Assert.True("read", "testing truncation".Equals(str)); }
/// <summary>Write a file and read it in, validating the result.</summary> /// <remarks> /// Write a file and read it in, validating the result. Optional flags control /// whether file overwrite operations should be enabled, and whether the /// file should be deleted afterwards. /// If there is a mismatch between what was written and what was expected, /// a small range of bytes either side of the first error are logged to aid /// diagnosing what problem occurred -whether it was a previous file /// or a corrupting of the current file. This assumes that two /// sequential runs to the same path use datasets with different character /// moduli. /// </remarks> /// <param name="path">path to write to</param> /// <param name="len">length of data</param> /// <param name="overwrite">should the create option allow overwrites?</param> /// <param name="delete"> /// should the file be deleted afterwards? -with a verification /// that it worked. Deletion is not attempted if an assertion has failed /// earlier -it is not in a <code>finally{}</code> block. /// </param> /// <exception cref="System.IO.IOException">IO problems</exception> protected internal virtual void WriteAndRead(Org.Apache.Hadoop.FS.Path path, byte [] src, int len, bool overwrite, bool delete) { Assert.True("Not enough data in source array to write " + len + " bytes", src.Length >= len); fs.Mkdirs(path.GetParent()); FSDataOutputStream @out = fs.Create(path, overwrite, fs.GetConf().GetInt("io.file.buffer.size" , 4096), (short)1, GetBlockSize()); @out.Write(src, 0, len); @out.Close(); Assert.True("Exists", fs.Exists(path)); Assert.Equal("Length", len, fs.GetFileStatus(path).GetLen()); FSDataInputStream @in = fs.Open(path); byte[] buf = new byte[len]; @in.ReadFully(0, buf); @in.Close(); Assert.Equal(len, buf.Length); int errors = 0; int first_error_byte = -1; for (int i = 0; i < len; i++) { if (src[i] != buf[i]) { if (errors == 0) { first_error_byte = i; } errors++; } } if (errors > 0) { string message = string.Format(" %d errors in file of length %d", errors, len); Log.Warn(message); // the range either side of the first error to print // this is a purely arbitrary number, to aid user debugging int overlap = 10; for (int i_1 = Math.Max(0, first_error_byte - overlap); i_1 < Math.Min(first_error_byte + overlap, len); i_1++) { byte actual = buf[i_1]; byte expected = src[i_1]; string letter = ToChar(actual); string line = string.Format("[%04d] %2x %s\n", i_1, actual, letter); if (expected != actual) { line = string.Format("[%04d] %2x %s -expected %2x %s\n", i_1, actual, letter, expected , ToChar(expected)); } Log.Warn(line); } Fail(message); } if (delete) { bool deleted = fs.Delete(path, false); Assert.True("Deleted", deleted); NUnit.Framework.Assert.IsFalse("No longer exists", fs.Exists(path)); } }
/// <summary> /// Test that we can zero-copy read cached data even without disabling /// checksums. /// </summary> /// <exception cref="System.Exception"/> public virtual void TestZeroCopyReadOfCachedData() { BlockReaderTestUtil.EnableShortCircuitShmTracing(); BlockReaderTestUtil.EnableBlockReaderFactoryTracing(); BlockReaderTestUtil.EnableHdfsCachingTracing(); int TestFileLength = BlockSize; Path TestPath = new Path("/a"); int RandomSeed = 23453; HdfsConfiguration conf = InitZeroCopyTest(); conf.SetBoolean(DFSConfigKeys.DfsClientReadShortcircuitSkipChecksumKey, false); string Context = "testZeroCopyReadOfCachedData"; conf.Set(DFSConfigKeys.DfsClientContext, Context); conf.SetLong(DFSConfigKeys.DfsDatanodeMaxLockedMemoryKey, DFSTestUtil.RoundUpToMultiple (TestFileLength, (int)NativeIO.POSIX.GetCacheManipulator().GetOperatingSystemPageSize ())); MiniDFSCluster cluster = null; ByteBuffer result = null; ByteBuffer result2 = null; cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); FsDatasetSpi <object> fsd = cluster.GetDataNodes()[0].GetFSDataset(); DistributedFileSystem fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, RandomSeed); DFSTestUtil.WaitReplication(fs, TestPath, (short)1); byte[] original = DFSTestUtil.CalculateFileContentsFromSeed(RandomSeed, TestFileLength ); // Prior to caching, the file can't be read via zero-copy FSDataInputStream fsIn = fs.Open(TestPath); try { result = fsIn.Read(null, TestFileLength / 2, EnumSet.NoneOf <ReadOption>()); NUnit.Framework.Assert.Fail("expected UnsupportedOperationException"); } catch (NotSupportedException) { } // expected // Cache the file fs.AddCachePool(new CachePoolInfo("pool1")); long directiveId = fs.AddCacheDirective(new CacheDirectiveInfo.Builder().SetPath( TestPath).SetReplication((short)1).SetPool("pool1").Build()); int numBlocks = (int)Math.Ceil((double)TestFileLength / BlockSize); DFSTestUtil.VerifyExpectedCacheUsage(DFSTestUtil.RoundUpToMultiple(TestFileLength , BlockSize), numBlocks, cluster.GetDataNodes()[0].GetFSDataset()); try { result = fsIn.Read(null, TestFileLength, EnumSet.NoneOf <ReadOption>()); } catch (NotSupportedException) { NUnit.Framework.Assert.Fail("expected to be able to read cached file via zero-copy" ); } Assert.AssertArrayEquals(Arrays.CopyOfRange(original, 0, BlockSize), ByteBufferToArray (result)); // Test that files opened after the cache operation has finished // still get the benefits of zero-copy (regression test for HDFS-6086) FSDataInputStream fsIn2 = fs.Open(TestPath); try { result2 = fsIn2.Read(null, TestFileLength, EnumSet.NoneOf <ReadOption>()); } catch (NotSupportedException) { NUnit.Framework.Assert.Fail("expected to be able to read cached file via zero-copy" ); } Assert.AssertArrayEquals(Arrays.CopyOfRange(original, 0, BlockSize), ByteBufferToArray (result2)); fsIn2.ReleaseBuffer(result2); fsIn2.Close(); // check that the replica is anchored ExtendedBlock firstBlock = DFSTestUtil.GetFirstBlock(fs, TestPath); ShortCircuitCache cache = ClientContext.Get(Context, new DFSClient.Conf(conf)).GetShortCircuitCache (); WaitForReplicaAnchorStatus(cache, firstBlock, true, true, 1); // Uncache the replica fs.RemoveCacheDirective(directiveId); WaitForReplicaAnchorStatus(cache, firstBlock, false, true, 1); fsIn.ReleaseBuffer(result); WaitForReplicaAnchorStatus(cache, firstBlock, false, false, 1); DFSTestUtil.VerifyExpectedCacheUsage(0, 0, fsd); fsIn.Close(); fs.Close(); cluster.Shutdown(); }
/// <summary> /// When mark() is used on BufferedInputStream, the request /// size on the checksum file system can be small. /// </summary> /// <remarks> /// When mark() is used on BufferedInputStream, the request /// size on the checksum file system can be small. However, /// checksum file system currently depends on the request size /// >= bytesPerSum to work properly. /// </remarks> /// <exception cref="System.IO.IOException"/> public virtual void TestTruncatedInputBug() { int ioBufSize = 512; int fileSize = ioBufSize * 4; int filePos = 0; Configuration conf = new Configuration(); conf.SetInt("io.file.buffer.size", ioBufSize); FileSystem fileSys = FileSystem.GetLocal(conf); try { // First create a test input file. Path testFile = new Path(TestRootDir, "HADOOP-1489"); WriteFile(fileSys, testFile, fileSize); Assert.True(fileSys.Exists(testFile)); Assert.True(fileSys.GetFileStatus(testFile).GetLen() == fileSize ); // Now read the file for ioBufSize bytes FSDataInputStream @in = fileSys.Open(testFile, ioBufSize); // seek beyond data buffered by open filePos += ioBufSize * 2 + (ioBufSize - 10); @in.Seek(filePos); // read 4 more bytes before marking for (int i = 0; i < 4; ++i) { if (@in.Read() == -1) { break; } ++filePos; } // Now set mark() to trigger the bug // NOTE: in the fixed code, mark() does nothing (not supported) and // hence won't trigger this bug. @in.Mark(1); System.Console.Out.WriteLine("MARKED"); // Try to read the rest while (filePos < fileSize) { if (@in.Read() == -1) { break; } ++filePos; } @in.Close(); System.Console.Out.WriteLine("Read " + filePos + " bytes." + " file size=" + fileSize ); Assert.True(filePos == fileSize); } finally { try { fileSys.Close(); } catch (Exception) { } } }
public virtual void TestClientMmapDisable() { HdfsConfiguration conf = InitZeroCopyTest(); conf.SetBoolean(DFSConfigKeys.DfsClientMmapEnabled, false); MiniDFSCluster cluster = null; Path TestPath = new Path("/a"); int TestFileLength = 16385; int RandomSeed = 23453; string Context = "testClientMmapDisable"; FSDataInputStream fsIn = null; DistributedFileSystem fs = null; conf.Set(DFSConfigKeys.DfsClientContext, Context); try { // With DFS_CLIENT_MMAP_ENABLED set to false, we should not do memory // mapped reads. cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, RandomSeed); DFSTestUtil.WaitReplication(fs, TestPath, (short)1); fsIn = fs.Open(TestPath); try { fsIn.Read(null, 1, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.Fail("expected zero-copy read to fail when client mmaps " + "were disabled."); } catch (NotSupportedException) { } } finally { if (fsIn != null) { fsIn.Close(); } if (fs != null) { fs.Close(); } if (cluster != null) { cluster.Shutdown(); } } fsIn = null; fs = null; cluster = null; try { // Now try again with DFS_CLIENT_MMAP_CACHE_SIZE == 0. It should work. conf.SetBoolean(DFSConfigKeys.DfsClientMmapEnabled, true); conf.SetInt(DFSConfigKeys.DfsClientMmapCacheSize, 0); conf.Set(DFSConfigKeys.DfsClientContext, Context + ".1"); cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, RandomSeed); DFSTestUtil.WaitReplication(fs, TestPath, (short)1); fsIn = fs.Open(TestPath); ByteBuffer buf = fsIn.Read(null, 1, EnumSet.Of(ReadOption.SkipChecksums)); fsIn.ReleaseBuffer(buf); // Test EOF behavior IOUtils.SkipFully(fsIn, TestFileLength - 1); buf = fsIn.Read(null, 1, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.AreEqual(null, buf); } finally { if (fsIn != null) { fsIn.Close(); } if (fs != null) { fs.Close(); } if (cluster != null) { cluster.Shutdown(); } } }
public virtual void TestZeroCopyReads() { HdfsConfiguration conf = InitZeroCopyTest(); MiniDFSCluster cluster = null; Path TestPath = new Path("/a"); FSDataInputStream fsIn = null; int TestFileLength = 3 * BlockSize; FileSystem fs = null; try { cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, 7567L); try { DFSTestUtil.WaitReplication(fs, TestPath, (short)1); } catch (Exception e) { NUnit.Framework.Assert.Fail("unexpected InterruptedException during " + "waitReplication: " + e); } catch (TimeoutException e) { NUnit.Framework.Assert.Fail("unexpected TimeoutException during " + "waitReplication: " + e); } fsIn = fs.Open(TestPath); byte[] original = new byte[TestFileLength]; IOUtils.ReadFully(fsIn, original, 0, TestFileLength); fsIn.Close(); fsIn = fs.Open(TestPath); ByteBuffer result = fsIn.Read(null, BlockSize, EnumSet.Of(ReadOption.SkipChecksums )); NUnit.Framework.Assert.AreEqual(BlockSize, result.Remaining()); HdfsDataInputStream dfsIn = (HdfsDataInputStream)fsIn; NUnit.Framework.Assert.AreEqual(BlockSize, dfsIn.GetReadStatistics().GetTotalBytesRead ()); NUnit.Framework.Assert.AreEqual(BlockSize, dfsIn.GetReadStatistics().GetTotalZeroCopyBytesRead ()); Assert.AssertArrayEquals(Arrays.CopyOfRange(original, 0, BlockSize), ByteBufferToArray (result)); fsIn.ReleaseBuffer(result); } finally { if (fsIn != null) { fsIn.Close(); } if (fs != null) { fs.Close(); } if (cluster != null) { cluster.Shutdown(); } } }
public virtual void TestZeroCopyMmapCache() { HdfsConfiguration conf = InitZeroCopyTest(); MiniDFSCluster cluster = null; Path TestPath = new Path("/a"); int TestFileLength = 5 * BlockSize; int RandomSeed = 23453; string Context = "testZeroCopyMmapCacheContext"; FSDataInputStream fsIn = null; ByteBuffer[] results = new ByteBuffer[] { null, null, null, null }; DistributedFileSystem fs = null; conf.Set(DFSConfigKeys.DfsClientContext, Context); cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, RandomSeed); try { DFSTestUtil.WaitReplication(fs, TestPath, (short)1); } catch (Exception e) { NUnit.Framework.Assert.Fail("unexpected InterruptedException during " + "waitReplication: " + e); } catch (TimeoutException e) { NUnit.Framework.Assert.Fail("unexpected TimeoutException during " + "waitReplication: " + e); } fsIn = fs.Open(TestPath); byte[] original = new byte[TestFileLength]; IOUtils.ReadFully(fsIn, original, 0, TestFileLength); fsIn.Close(); fsIn = fs.Open(TestPath); ShortCircuitCache cache = ClientContext.Get(Context, new DFSClient.Conf(conf)).GetShortCircuitCache (); cache.Accept(new TestEnhancedByteBufferAccess.CountingVisitor(0, 5, 5, 0)); results[0] = fsIn.Read(null, BlockSize, EnumSet.Of(ReadOption.SkipChecksums)); fsIn.Seek(0); results[1] = fsIn.Read(null, BlockSize, EnumSet.Of(ReadOption.SkipChecksums)); // The mmap should be of the first block of the file. ExtendedBlock firstBlock = DFSTestUtil.GetFirstBlock(fs, TestPath); cache.Accept(new _CacheVisitor_373(firstBlock)); // The replica should not yet be evictable, since we have it open. // Read more blocks. results[2] = fsIn.Read(null, BlockSize, EnumSet.Of(ReadOption.SkipChecksums)); results[3] = fsIn.Read(null, BlockSize, EnumSet.Of(ReadOption.SkipChecksums)); // we should have 3 mmaps, 1 evictable cache.Accept(new TestEnhancedByteBufferAccess.CountingVisitor(3, 5, 2, 0)); // After we close the cursors, the mmaps should be evictable for // a brief period of time. Then, they should be closed (we're // using a very quick timeout) foreach (ByteBuffer buffer in results) { if (buffer != null) { fsIn.ReleaseBuffer(buffer); } } fsIn.Close(); GenericTestUtils.WaitFor(new _Supplier_407(cache), 10, 60000); cache.Accept(new TestEnhancedByteBufferAccess.CountingVisitor(0, -1, -1, -1)); fs.Close(); cluster.Shutdown(); }
/// <exception cref="System.IO.IOException"/> public virtual void Close() { stream.Close(); }
public virtual void Test2GBMmapLimit() { Assume.AssumeTrue(BlockReaderTestUtil.ShouldTestLargeFiles()); HdfsConfiguration conf = InitZeroCopyTest(); long TestFileLength = 2469605888L; conf.Set(DFSConfigKeys.DfsChecksumTypeKey, "NULL"); conf.SetLong(DFSConfigKeys.DfsBlockSizeKey, TestFileLength); MiniDFSCluster cluster = null; Path TestPath = new Path("/a"); string Context = "test2GBMmapLimit"; conf.Set(DFSConfigKeys.DfsClientContext, Context); FSDataInputStream fsIn = null; FSDataInputStream fsIn2 = null; ByteBuffer buf1 = null; ByteBuffer buf2 = null; try { cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build(); cluster.WaitActive(); DistributedFileSystem fs = cluster.GetFileSystem(); DFSTestUtil.CreateFile(fs, TestPath, TestFileLength, (short)1, unchecked ((int)(0xB ))); DFSTestUtil.WaitReplication(fs, TestPath, (short)1); fsIn = fs.Open(TestPath); buf1 = fsIn.Read(null, 1, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.AreEqual(1, buf1.Remaining()); fsIn.ReleaseBuffer(buf1); buf1 = null; fsIn.Seek(2147483640L); buf1 = fsIn.Read(null, 1024, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.AreEqual(7, buf1.Remaining()); NUnit.Framework.Assert.AreEqual(int.MaxValue, buf1.Limit()); fsIn.ReleaseBuffer(buf1); buf1 = null; NUnit.Framework.Assert.AreEqual(2147483647L, fsIn.GetPos()); try { buf1 = fsIn.Read(null, 1024, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.Fail("expected UnsupportedOperationException"); } catch (NotSupportedException) { } // expected; can't read past 2GB boundary. fsIn.Close(); fsIn = null; // Now create another file with normal-sized blocks, and verify we // can read past 2GB Path TestPath2 = new Path("/b"); conf.SetLong(DFSConfigKeys.DfsBlockSizeKey, 268435456L); DFSTestUtil.CreateFile(fs, TestPath2, 1024 * 1024, TestFileLength, 268435456L, (short )1, unchecked ((int)(0xA))); fsIn2 = fs.Open(TestPath2); fsIn2.Seek(2147483640L); buf2 = fsIn2.Read(null, 1024, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.AreEqual(8, buf2.Remaining()); NUnit.Framework.Assert.AreEqual(2147483648L, fsIn2.GetPos()); fsIn2.ReleaseBuffer(buf2); buf2 = null; buf2 = fsIn2.Read(null, 1024, EnumSet.Of(ReadOption.SkipChecksums)); NUnit.Framework.Assert.AreEqual(1024, buf2.Remaining()); NUnit.Framework.Assert.AreEqual(2147484672L, fsIn2.GetPos()); fsIn2.ReleaseBuffer(buf2); buf2 = null; } finally { if (buf1 != null) { fsIn.ReleaseBuffer(buf1); } if (buf2 != null) { fsIn2.ReleaseBuffer(buf2); } IOUtils.Cleanup(null, fsIn, fsIn2); if (cluster != null) { cluster.Shutdown(); } } }