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HDFS-1753. Resource Leak in StreamFile. Contributed by Uma Maheswara Rao G 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1143106 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Eli Collins 2011-07-05 15:31:58 +00:00
parent eadb1a0323
commit 1e5e03c73c
3 changed files with 171 additions and 24 deletions
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2
hdfs/CHANGES.txt
View File

@ -862,6 +862,8 @@ Release 0.22.0 - Unreleased
HDFS-528. Add ability for safemode to wait for a minimum number of
live datanodes (Todd Lipcon via eli)
HDFS-1753. Resource Leak in StreamFile. (Uma Maheswara Rao G via eli)
IMPROVEMENTS
HDFS-1304. Add a new unit test for HftpFileSystem.open(..). (szetszwo)

45
hdfs/src/java/org/apache/hadoop/hdfs/server/namenode/StreamFile.java
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@ -18,7 +18,6 @@
package org.apache.hadoop.hdfs.server.namenode;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Enumeration;
@ -85,31 +84,41 @@ public class StreamFile extends DfsServlet {
return;
}
final DFSInputStream in = dfs.open(filename);
final long fileLen = in.getFileLength();
OutputStream os = response.getOutputStream();
DFSInputStream in = null;
OutputStream out = null;
try {
in = dfs.open(filename);
out = response.getOutputStream();
final long fileLen = in.getFileLength();
if (reqRanges != null) {
List<InclusiveByteRange> ranges =
InclusiveByteRange.satisfiableRanges(reqRanges, fileLen);
StreamFile.sendPartialData(in, os, response, fileLen, ranges, true);
StreamFile.sendPartialData(in, out, response, fileLen, ranges);
} else {
// No ranges, so send entire file
response.setHeader("Content-Disposition", "attachment; filename=\"" +
filename + "\"");
response.setContentType("application/octet-stream");
response.setHeader(CONTENT_LENGTH, "" + fileLen);
StreamFile.copyFromOffset(in, os, 0L, fileLen, true);
StreamFile.copyFromOffset(in, out, 0L, fileLen);
}
} catch (IOException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("response.isCommitted()=" + response.isCommitted(), e);
}
throw e;
} finally {
in.close();
in = null;
out.close();
out = null;
dfs.close();
}
dfs = null;
} catch (IOException ioe) {
if (LOG.isDebugEnabled()) {
LOG.debug("response.isCommitted()=" + response.isCommitted(), ioe);
}
throw ioe;
} finally {
IOUtils.cleanup(LOG, in);
IOUtils.cleanup(LOG, out);
IOUtils.cleanup(LOG, dfs);
}
}
/**
@ -122,15 +131,13 @@ public class StreamFile extends DfsServlet {
* @param response http response to use
* @param contentLength for the response header
* @param ranges to write to respond with
* @param close whether to close the streams
* @throws IOException on error sending the response
*/
static void sendPartialData(FSInputStream in,
OutputStream out,
HttpServletResponse response,
long contentLength,
List<InclusiveByteRange> ranges,
boolean close)
List<InclusiveByteRange> ranges)
throws IOException {
if (ranges == null || ranges.size() != 1) {
response.setContentLength(0);
@ -145,14 +152,14 @@ public class StreamFile extends DfsServlet {
singleSatisfiableRange.toHeaderRangeString(contentLength));
copyFromOffset(in, out,
singleSatisfiableRange.getFirst(contentLength),
singleLength, close);
singleLength);
}
}
/* Copy count bytes at the given offset from one stream to another */
static void copyFromOffset(FSInputStream in, OutputStream out, long offset,
long count, boolean close) throws IOException {
long count) throws IOException {
in.seek(offset);
IOUtils.copyBytes(in, out, count, close);
IOUtils.copyBytes(in, out, count, false);
}
}

148
hdfs/src/test/hdfs/org/apache/hadoop/hdfs/server/namenode/TestStreamFile.java
View File

@ -20,18 +20,30 @@ package org.apache.hadoop.hdfs.server.namenode;
import static org.junit.Assert.assertArrayEquals;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.Vector;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.junit.Test;
import static org.junit.Assert.*;
import org.apache.hadoop.fs.FSInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.DFSInputStream;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.common.JspHelper;
import org.mockito.Mockito;
import org.mortbay.jetty.InclusiveByteRange;
/*
@ -188,7 +200,29 @@ class MockHttpServletResponse implements HttpServletResponse {
public class TestStreamFile {
private HdfsConfiguration CONF = new HdfsConfiguration();
private DFSClient clientMock = Mockito.mock(DFSClient.class);
private HttpServletRequest mockHttpServletRequest =
Mockito.mock(HttpServletRequest.class);
private HttpServletResponse mockHttpServletResponse =
Mockito.mock(HttpServletResponse.class);
private final ServletContext mockServletContext =
Mockito.mock(ServletContext.class);
StreamFile sfile = new StreamFile() {
private static final long serialVersionUID = -5513776238875189473L;
public ServletContext getServletContext() {
return mockServletContext;
}
@Override
protected DFSClient getDFSClient(HttpServletRequest request)
throws IOException, InterruptedException {
return clientMock;
}
};
// return an array matching the output of mockfsinputstream
private static byte[] getOutputArray(int start, int count) {
byte[] a = new byte[count];
@ -220,7 +254,7 @@ public class TestStreamFile {
assertTrue("Pairs array must be even", pairs.length % 2 == 0);
for (int i = 0; i < pairs.length; i+=2) {
StreamFile.copyFromOffset(fsin, os, pairs[i], pairs[i+1], false);
StreamFile.copyFromOffset(fsin, os, pairs[i], pairs[i+1]);
assertArrayEquals("Reading " + pairs[i+1]
+ " bytes from offset " + pairs[i],
getOutputArray(pairs[i], pairs[i+1]),
@ -246,7 +280,7 @@ public class TestStreamFile {
{
List<InclusiveByteRange> ranges = strToRanges("0-,10-300", 500);
MockHttpServletResponse response = new MockHttpServletResponse();
StreamFile.sendPartialData(in, os, response, 500, ranges, false);
StreamFile.sendPartialData(in, os, response, 500, ranges);
assertEquals("Multiple ranges should result in a 416 error",
416, response.getStatus());
}
@ -255,7 +289,7 @@ public class TestStreamFile {
{
os.reset();
MockHttpServletResponse response = new MockHttpServletResponse();
StreamFile.sendPartialData(in, os, response, 500, null, false);
StreamFile.sendPartialData(in, os, response, 500, null);
assertEquals("No ranges should result in a 416 error",
416, response.getStatus());
}
@ -264,7 +298,7 @@ public class TestStreamFile {
{
List<InclusiveByteRange> ranges = strToRanges("600-800", 500);
MockHttpServletResponse response = new MockHttpServletResponse();
StreamFile.sendPartialData(in, os, response, 500, ranges, false);
StreamFile.sendPartialData(in, os, response, 500, ranges);
assertEquals("Single (but invalid) range should result in a 416",
416, response.getStatus());
}
@ -274,7 +308,7 @@ public class TestStreamFile {
{
List<InclusiveByteRange> ranges = strToRanges("100-300", 500);
MockHttpServletResponse response = new MockHttpServletResponse();
StreamFile.sendPartialData(in, os, response, 500, ranges, false);
StreamFile.sendPartialData(in, os, response, 500, ranges);
assertEquals("Single (valid) range should result in a 206",
206, response.getStatus());
assertArrayEquals("Byte range from 100-300",
@ -283,4 +317,108 @@ public class TestStreamFile {
}
}
// Test for positive scenario
@Test
public void testDoGetShouldWriteTheFileContentIntoServletOutputStream()
throws Exception {
MiniDFSCluster cluster = new MiniDFSCluster.Builder(CONF).numDataNodes(1)
.build();
try {
Path testFile = createFile();
setUpForDoGetTest(cluster, testFile);
ServletOutputStreamExtn outStream = new ServletOutputStreamExtn();
Mockito.doReturn(outStream).when(mockHttpServletResponse)
.getOutputStream();
StreamFile sfile = new StreamFile() {
private static final long serialVersionUID = 7715590481809562722L;
public ServletContext getServletContext() {
return mockServletContext;
}
};
sfile.doGet(mockHttpServletRequest, mockHttpServletResponse);
assertEquals("Not writing the file data into ServletOutputStream",
outStream.getResult(), "test");
} finally {
cluster.shutdown();
}
}
// Test for cleaning the streams in exception cases also
@Test
public void testDoGetShouldCloseTheDFSInputStreamIfResponseGetOutPutStreamThrowsAnyException()
throws Exception {
MiniDFSCluster cluster = new MiniDFSCluster.Builder(CONF).numDataNodes(1)
.build();
try {
Path testFile = createFile();
setUpForDoGetTest(cluster, testFile);
Mockito.doThrow(new IOException()).when(mockHttpServletResponse)
.getOutputStream();
DFSInputStream fsMock = Mockito.mock(DFSInputStream.class);
Mockito.doReturn(fsMock).when(clientMock).open(testFile.toString());
Mockito.doReturn(Long.valueOf(4)).when(fsMock).getFileLength();
try {
sfile.doGet(mockHttpServletRequest, mockHttpServletResponse);
fail("Not throwing the IOException");
} catch (IOException e) {
Mockito.verify(clientMock, Mockito.atLeastOnce()).close();
}
} finally {
cluster.shutdown();
}
}
private void setUpForDoGetTest(MiniDFSCluster cluster, Path testFile)
throws IOException {
Mockito.doReturn(CONF).when(mockServletContext).getAttribute(
JspHelper.CURRENT_CONF);
Mockito.doReturn(NameNode.getHostPortString(NameNode.getAddress(CONF)))
.when(mockHttpServletRequest).getParameter("nnaddr");
Mockito.doReturn(testFile.toString()).when(mockHttpServletRequest)
.getPathInfo();
}
static Path writeFile(FileSystem fs, Path f) throws IOException {
DataOutputStream out = fs.create(f);
try {
out.writeBytes("test");
} finally {
out.close();
}
assertTrue(fs.exists(f));
return f;
}
private Path createFile() throws IOException {
FileSystem fs = FileSystem.get(CONF);
Path testFile = new Path("/test/mkdirs/doGet");
writeFile(fs, testFile);
return testFile;
}
public static class ServletOutputStreamExtn extends ServletOutputStream {
private StringBuffer buffer = new StringBuffer(3);
public String getResult() {
return buffer.toString();
}
@Override
public void write(int b) throws IOException {
buffer.append((char) b);
}
}
}