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MAPREDUCE-5787. Added the ability to keep alive shuffle connections in the MapReduce shuffle-handler. Contributed by Rajesh Balamohan.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1580062 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli 2014-03-21 21:43:55 +00:00
parent fc53af9c4c
commit a5c08eed16
4 changed files with 397 additions and 48 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
View File

@ -173,6 +173,9 @@ Release 2.4.0 - UNRELEASED
NEW FEATURES
MAPREDUCE-5787. Added the ability to keep alive shuffle connections in the
MapReduce shuffle-handler. (Rajesh Balamohan via vinodkv)
IMPROVEMENTS
MAPREDUCE-5464. Add analogs of the SLOTS_MILLIS counters that jive with the

15
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
View File

@ -151,6 +151,21 @@
</description>
</property>
<property>
<name>mapreduce.shuffle.connection-keep-alive.enable</name>
<value>false</value>
<description>set to true to support keep-alive connections.</description>
</property>
<property>
<name>mapreduce.shuffle.connection-keep-alive.timeout</name>
<value>5</value>
<description>The number of seconds a shuffle client attempts to retain
http connection. Refer "Keep-Alive: timeout=" header in
Http specification
</description>
</property>
<property>
<name>mapreduce.task.timeout</name>
<value>600000</value>

201
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
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@ -23,7 +23,6 @@
import static org.jboss.netty.handler.codec.http.HttpMethod.GET;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.FORBIDDEN;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.HTTP_VERSION_NOT_SUPPORTED;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.INTERNAL_SERVER_ERROR;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.METHOD_NOT_ALLOWED;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.NOT_FOUND;
@ -41,6 +40,7 @@
import java.nio.channels.ClosedChannelException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
@ -110,6 +110,7 @@
import org.jboss.netty.handler.ssl.SslHandler;
import org.jboss.netty.handler.stream.ChunkedWriteHandler;
import org.jboss.netty.util.CharsetUtil;
import org.mortbay.jetty.HttpHeaders;
import com.google.common.base.Charsets;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
@ -156,6 +157,21 @@ public class ShuffleHandler extends AuxiliaryService {
public static final String SHUFFLE_PORT_CONFIG_KEY = "mapreduce.shuffle.port";
public static final int DEFAULT_SHUFFLE_PORT = 13562;
public static final String SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED =
"mapreduce.shuffle.connection-keep-alive.enable";
public static final boolean DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED = false;
public static final String SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT =
"mapreduce.shuffle.connection-keep-alive.timeout";
public static final int DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT = 5; //seconds
public static final String SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE =
"mapreduce.shuffle.mapoutput-info.meta.cache.size";
public static final int DEFAULT_SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE =
1000;
public static final String CONNECTION_CLOSE = "close";
public static final String SUFFLE_SSL_FILE_BUFFER_SIZE_KEY =
"mapreduce.shuffle.ssl.file.buffer.size";
@ -167,6 +183,9 @@ public class ShuffleHandler extends AuxiliaryService {
public static final String MAX_SHUFFLE_THREADS = "mapreduce.shuffle.max.threads";
// 0 implies Netty default of 2 * number of available processors
public static final int DEFAULT_MAX_SHUFFLE_THREADS = 0;
boolean connectionKeepAliveEnabled = false;
int connectionKeepAliveTimeOut;
int mapOutputMetaInfoCacheSize;
@Metrics(about="Shuffle output metrics", context="mapred")
static class ShuffleMetrics implements ChannelFutureListener {
@ -328,6 +347,15 @@ protected void serviceStart() throws Exception {
sslFileBufferSize = conf.getInt(SUFFLE_SSL_FILE_BUFFER_SIZE_KEY,
DEFAULT_SUFFLE_SSL_FILE_BUFFER_SIZE);
connectionKeepAliveEnabled =
conf.getBoolean(SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED,
DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED);
connectionKeepAliveTimeOut =
Math.max(1, conf.getInt(SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT,
DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT));
mapOutputMetaInfoCacheSize =
Math.max(1, conf.getInt(SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE,
DEFAULT_SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE));
}
@Override
@ -459,6 +487,15 @@ public void messageReceived(ChannelHandlerContext ctx, MessageEvent evt)
}
final Map<String,List<String>> q =
new QueryStringDecoder(request.getUri()).getParameters();
final List<String> keepAliveList = q.get("keepAlive");
boolean keepAliveParam = false;
if (keepAliveList != null && keepAliveList.size() == 1) {
keepAliveParam = Boolean.valueOf(keepAliveList.get(0));
if (LOG.isDebugEnabled()) {
LOG.debug("KeepAliveParam : " + keepAliveList
+ " : " + keepAliveParam);
}
}
final List<String> mapIds = splitMaps(q.get("map"));
final List<String> reduceQ = q.get("reduce");
final List<String> jobQ = q.get("job");
@ -466,7 +503,8 @@ public void messageReceived(ChannelHandlerContext ctx, MessageEvent evt)
LOG.debug("RECV: " + request.getUri() +
"\n mapId: " + mapIds +
"\n reduceId: " + reduceQ +
"\n jobId: " + jobQ);
"\n jobId: " + jobQ +
"\n keepAlive: " + keepAliveParam);
}
if (mapIds == null || reduceQ == null || jobQ == null) {
@ -505,27 +543,46 @@ public void messageReceived(ChannelHandlerContext ctx, MessageEvent evt)
return;
}
Map<String, MapOutputInfo> mapOutputInfoMap =
new HashMap<String, MapOutputInfo>();
Channel ch = evt.getChannel();
String user = userRsrc.get(jobId);
// $x/$user/appcache/$appId/output/$mapId
// TODO: Once Shuffle is out of NM, this can use MR APIs to convert
// between App and Job
String outputBasePathStr = getBaseLocation(jobId, user);
try {
populateHeaders(mapIds, outputBasePathStr, user, reduceId, request,
response, keepAliveParam, mapOutputInfoMap);
} catch(IOException e) {
ch.write(response);
LOG.error("Shuffle error in populating headers :", e);
String errorMessage = getErrorMessage(e);
sendError(ctx,errorMessage , INTERNAL_SERVER_ERROR);
return;
}
ch.write(response);
// TODO refactor the following into the pipeline
ChannelFuture lastMap = null;
for (String mapId : mapIds) {
try {
MapOutputInfo info = mapOutputInfoMap.get(mapId);
if (info == null) {
info = getMapOutputInfo(outputBasePathStr, mapId, reduceId, user);
}
lastMap =
sendMapOutput(ctx, ch, userRsrc.get(jobId), jobId, mapId, reduceId);
sendMapOutput(ctx, ch, user, mapId,
reduceId, info);
if (null == lastMap) {
sendError(ctx, NOT_FOUND);
return;
}
} catch (IOException e) {
LOG.error("Shuffle error :", e);
StringBuffer sb = new StringBuffer(e.getMessage());
Throwable t = e;
while (t.getCause() != null) {
sb.append(t.getCause().getMessage());
t = t.getCause();
}
sendError(ctx,sb.toString() , INTERNAL_SERVER_ERROR);
String errorMessage = getErrorMessage(e);
sendError(ctx,errorMessage , INTERNAL_SERVER_ERROR);
return;
}
}
@ -533,6 +590,99 @@ public void messageReceived(ChannelHandlerContext ctx, MessageEvent evt)
lastMap.addListener(ChannelFutureListener.CLOSE);
}
private String getErrorMessage(Throwable t) {
StringBuffer sb = new StringBuffer(t.getMessage());
while (t.getCause() != null) {
sb.append(t.getCause().getMessage());
t = t.getCause();
}
return sb.toString();
}
private String getBaseLocation(String jobId, String user) {
final JobID jobID = JobID.forName(jobId);
final ApplicationId appID =
ApplicationId.newInstance(Long.parseLong(jobID.getJtIdentifier()),
jobID.getId());
final String baseStr =
ContainerLocalizer.USERCACHE + "/" + user + "/"
+ ContainerLocalizer.APPCACHE + "/"
+ ConverterUtils.toString(appID) + "/output" + "/";
return baseStr;
}
protected MapOutputInfo getMapOutputInfo(String base, String mapId,
int reduce, String user) throws IOException {
// Index file
Path indexFileName =
lDirAlloc.getLocalPathToRead(base + "/file.out.index", conf);
IndexRecord info =
indexCache.getIndexInformation(mapId, reduce, indexFileName, user);
Path mapOutputFileName =
lDirAlloc.getLocalPathToRead(base + "/file.out", conf);
if (LOG.isDebugEnabled()) {
LOG.debug(base + " : " + mapOutputFileName + " : " + indexFileName);
}
MapOutputInfo outputInfo = new MapOutputInfo(mapOutputFileName, info);
return outputInfo;
}
protected void populateHeaders(List<String> mapIds, String outputBaseStr,
String user, int reduce, HttpRequest request, HttpResponse response,
boolean keepAliveParam, Map<String, MapOutputInfo> mapOutputInfoMap)
throws IOException {
long contentLength = 0;
for (String mapId : mapIds) {
String base = outputBaseStr + mapId;
MapOutputInfo outputInfo = getMapOutputInfo(base, mapId, reduce, user);
if (mapOutputInfoMap.size() < mapOutputMetaInfoCacheSize) {
mapOutputInfoMap.put(mapId, outputInfo);
}
// Index file
Path indexFileName =
lDirAlloc.getLocalPathToRead(base + "/file.out.index", conf);
IndexRecord info =
indexCache.getIndexInformation(mapId, reduce, indexFileName, user);
ShuffleHeader header =
new ShuffleHeader(mapId, info.partLength, info.rawLength, reduce);
DataOutputBuffer dob = new DataOutputBuffer();
header.write(dob);
contentLength += info.partLength;
contentLength += dob.getLength();
}
// Now set the response headers.
setResponseHeaders(response, keepAliveParam, contentLength);
}
protected void setResponseHeaders(HttpResponse response,
boolean keepAliveParam, long contentLength) {
if (!connectionKeepAliveEnabled && !keepAliveParam) {
LOG.info("Setting connection close header...");
response.setHeader(HttpHeaders.CONNECTION, CONNECTION_CLOSE);
} else {
response.setHeader(HttpHeaders.CONTENT_LENGTH,
String.valueOf(contentLength));
response.setHeader(HttpHeaders.CONNECTION, HttpHeaders.KEEP_ALIVE);
response.setHeader(HttpHeaders.KEEP_ALIVE, "timeout="
+ connectionKeepAliveTimeOut);
LOG.info("Content Length in shuffle : " + contentLength);
}
}
class MapOutputInfo {
final Path mapOutputFileName;
final IndexRecord indexRecord;
MapOutputInfo(Path mapOutputFileName, IndexRecord indexRecord) {
this.mapOutputFileName = mapOutputFileName;
this.indexRecord = indexRecord;
}
}
protected void verifyRequest(String appid, ChannelHandlerContext ctx,
HttpRequest request, HttpResponse response, URL requestUri)
throws IOException {
@ -575,39 +725,16 @@ protected void verifyRequest(String appid, ChannelHandlerContext ctx,
}
protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx, Channel ch,
String user, String jobId, String mapId, int reduce)
String user, String mapId, int reduce, MapOutputInfo mapOutputInfo)
throws IOException {
// TODO replace w/ rsrc alloc
// $x/$user/appcache/$appId/output/$mapId
// TODO: Once Shuffle is out of NM, this can use MR APIs to convert between App and Job
JobID jobID = JobID.forName(jobId);
ApplicationId appID = ApplicationId.newInstance(
Long.parseLong(jobID.getJtIdentifier()), jobID.getId());
final String base =
ContainerLocalizer.USERCACHE + "/" + user + "/"
+ ContainerLocalizer.APPCACHE + "/"
+ ConverterUtils.toString(appID) + "/output" + "/" + mapId;
if (LOG.isDebugEnabled()) {
LOG.debug("DEBUG0 " + base);
}
// Index file
Path indexFileName = lDirAlloc.getLocalPathToRead(
base + "/file.out.index", conf);
// Map-output file
Path mapOutputFileName = lDirAlloc.getLocalPathToRead(
base + "/file.out", conf);
if (LOG.isDebugEnabled()) {
LOG.debug("DEBUG1 " + base + " : " + mapOutputFileName + " : "
+ indexFileName);
}
final IndexRecord info =
indexCache.getIndexInformation(mapId, reduce, indexFileName, user);
final IndexRecord info = mapOutputInfo.indexRecord;
final ShuffleHeader header =
new ShuffleHeader(mapId, info.partLength, info.rawLength, reduce);
final DataOutputBuffer dob = new DataOutputBuffer();
header.write(dob);
ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
final File spillfile = new File(mapOutputFileName.toString());
final File spillfile =
new File(mapOutputInfo.mapOutputFileName.toString());
RandomAccessFile spill;
try {
spill = SecureIOUtils.openForRandomRead(spillfile, "r", user, null);

226
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/test/java/org/apache/hadoop/mapred/TestShuffleHandler.java
View File

@ -23,6 +23,8 @@
import static org.apache.hadoop.test.MockitoMaker.make;
import static org.apache.hadoop.test.MockitoMaker.stub;
import static org.jboss.netty.buffer.ChannelBuffers.wrappedBuffer;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.OK;
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeTrue;
@ -39,6 +41,7 @@
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.zip.CheckedOutputStream;
import java.util.zip.Checksum;
@ -69,17 +72,24 @@
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.junit.Assert;
import org.junit.Test;
import org.mortbay.jetty.HttpHeaders;
public class TestShuffleHandler {
static final long MiB = 1024 * 1024;
private static final Log LOG = LogFactory.getLog(TestShuffleHandler.class);
/**
* Test the validation of ShuffleHandler's meta-data's serialization and
* de-serialization.
*
* @throws Exception exception
*/
@Test (timeout = 10000)
public void testSerializeMeta() throws Exception {
assertEquals(1, ShuffleHandler.deserializeMetaData(
@ -90,6 +100,11 @@ public void testSerializeMeta() throws Exception {
ShuffleHandler.serializeMetaData(8080)));
}
/**
* Validate shuffle connection and input/output metrics.
*
* @throws Exception exception
*/
@Test (timeout = 10000)
public void testShuffleMetrics() throws Exception {
MetricsSystem ms = new MetricsSystemImpl();
@ -120,6 +135,11 @@ static void checkShuffleMetrics(MetricsSystem ms, long bytes, int failed,
assertGauge("ShuffleConnections", connections, rb);
}
/**
* Verify client prematurely closing a connection.
*
* @throws Exception exception.
*/
@Test (timeout = 10000)
public void testClientClosesConnection() throws Exception {
final ArrayList<Throwable> failures = new ArrayList<Throwable>(1);
@ -130,6 +150,20 @@ public void testClientClosesConnection() throws Exception {
protected Shuffle getShuffle(Configuration conf) {
// replace the shuffle handler with one stubbed for testing
return new Shuffle(conf) {
@Override
protected MapOutputInfo getMapOutputInfo(String base, String mapId,
int reduce, String user) throws IOException {
return null;
}
@Override
protected void populateHeaders(List<String> mapIds, String jobId,
String user, int reduce, HttpRequest request,
HttpResponse response, boolean keepAliveParam,
Map<String, MapOutputInfo> infoMap) throws IOException {
// Only set response headers and skip everything else
// send some dummy value for content-length
super.setResponseHeaders(response, keepAliveParam, 100);
}
@Override
protected void verifyRequest(String appid, ChannelHandlerContext ctx,
HttpRequest request, HttpResponse response, URL requestUri)
@ -137,7 +171,8 @@ protected void verifyRequest(String appid, ChannelHandlerContext ctx,
}
@Override
protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx,
Channel ch, String user, String jobId, String mapId, int reduce)
Channel ch, String user, String mapId, int reduce,
MapOutputInfo info)
throws IOException {
// send a shuffle header and a lot of data down the channel
// to trigger a broken pipe
@ -147,7 +182,7 @@ protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx,
header.write(dob);
ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
dob = new DataOutputBuffer();
for (int i=0; i<100000; ++i) {
for (int i = 0; i < 100000; ++i) {
header.write(dob);
}
return ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
@ -187,6 +222,7 @@ protected void sendError(ChannelHandlerContext ctx, String message,
conn.connect();
DataInputStream input = new DataInputStream(conn.getInputStream());
Assert.assertEquals(HttpURLConnection.HTTP_OK, conn.getResponseCode());
Assert.assertEquals("close", conn.getHeaderField(HttpHeaders.CONNECTION));
ShuffleHeader header = new ShuffleHeader();
header.readFields(input);
input.close();
@ -196,6 +232,147 @@ protected void sendError(ChannelHandlerContext ctx, String message,
failures.size() == 0);
}
@Test(timeout = 10000)
public void testKeepAlive() throws Exception {
final ArrayList<Throwable> failures = new ArrayList<Throwable>(1);
Configuration conf = new Configuration();
conf.setInt(ShuffleHandler.SHUFFLE_PORT_CONFIG_KEY, 0);
conf.setBoolean(ShuffleHandler.SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED, true);
// try setting to -ve keep alive timeout.
conf.setInt(ShuffleHandler.SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT, -100);
ShuffleHandler shuffleHandler = new ShuffleHandler() {
@Override
protected Shuffle getShuffle(final Configuration conf) {
// replace the shuffle handler with one stubbed for testing
return new Shuffle(conf) {
@Override
protected MapOutputInfo getMapOutputInfo(String base, String mapId,
int reduce, String user) throws IOException {
return null;
}
@Override
protected void verifyRequest(String appid, ChannelHandlerContext ctx,
HttpRequest request, HttpResponse response, URL requestUri)
throws IOException {
}
@Override
protected void populateHeaders(List<String> mapIds, String jobId,
String user, int reduce, HttpRequest request,
HttpResponse response, boolean keepAliveParam,
Map<String, MapOutputInfo> infoMap) throws IOException {
// Send some dummy data (populate content length details)
ShuffleHeader header =
new ShuffleHeader("attempt_12345_1_m_1_0", 5678, 5678, 1);
DataOutputBuffer dob = new DataOutputBuffer();
header.write(dob);
dob = new DataOutputBuffer();
for (int i = 0; i < 100000; ++i) {
header.write(dob);
}
long contentLength = dob.getLength();
// for testing purpose;
// disable connectinKeepAliveEnabled if keepAliveParam is available
if (keepAliveParam) {
connectionKeepAliveEnabled = false;
}
super.setResponseHeaders(response, keepAliveParam, contentLength);
}
@Override
protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx,
Channel ch, String user, String mapId, int reduce,
MapOutputInfo info) throws IOException {
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
// send a shuffle header and a lot of data down the channel
// to trigger a broken pipe
ShuffleHeader header =
new ShuffleHeader("attempt_12345_1_m_1_0", 5678, 5678, 1);
DataOutputBuffer dob = new DataOutputBuffer();
header.write(dob);
ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
dob = new DataOutputBuffer();
for (int i = 0; i < 100000; ++i) {
header.write(dob);
}
return ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
}
@Override
protected void sendError(ChannelHandlerContext ctx,
HttpResponseStatus status) {
if (failures.size() == 0) {
failures.add(new Error());
ctx.getChannel().close();
}
}
@Override
protected void sendError(ChannelHandlerContext ctx, String message,
HttpResponseStatus status) {
if (failures.size() == 0) {
failures.add(new Error());
ctx.getChannel().close();
}
}
};
}
};
shuffleHandler.init(conf);
shuffleHandler.start();
String shuffleBaseURL = "http://127.0.0.1:"
+ shuffleHandler.getConfig().get(
ShuffleHandler.SHUFFLE_PORT_CONFIG_KEY);
URL url =
new URL(shuffleBaseURL + "/mapOutput?job=job_12345_1&reduce=1&"
+ "map=attempt_12345_1_m_1_0");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty(ShuffleHeader.HTTP_HEADER_NAME,
ShuffleHeader.DEFAULT_HTTP_HEADER_NAME);
conn.setRequestProperty(ShuffleHeader.HTTP_HEADER_VERSION,
ShuffleHeader.DEFAULT_HTTP_HEADER_VERSION);
conn.connect();
DataInputStream input = new DataInputStream(conn.getInputStream());
Assert.assertEquals(HttpHeaders.KEEP_ALIVE,
conn.getHeaderField(HttpHeaders.CONNECTION));
Assert.assertEquals("timeout=1",
conn.getHeaderField(HttpHeaders.KEEP_ALIVE));
Assert.assertEquals(HttpURLConnection.HTTP_OK, conn.getResponseCode());
ShuffleHeader header = new ShuffleHeader();
header.readFields(input);
input.close();
// For keepAlive via URL
url =
new URL(shuffleBaseURL + "/mapOutput?job=job_12345_1&reduce=1&"
+ "map=attempt_12345_1_m_1_0&keepAlive=true");
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty(ShuffleHeader.HTTP_HEADER_NAME,
ShuffleHeader.DEFAULT_HTTP_HEADER_NAME);
conn.setRequestProperty(ShuffleHeader.HTTP_HEADER_VERSION,
ShuffleHeader.DEFAULT_HTTP_HEADER_VERSION);
conn.connect();
input = new DataInputStream(conn.getInputStream());
Assert.assertEquals(HttpHeaders.KEEP_ALIVE,
conn.getHeaderField(HttpHeaders.CONNECTION));
Assert.assertEquals("timeout=1",
conn.getHeaderField(HttpHeaders.KEEP_ALIVE));
Assert.assertEquals(HttpURLConnection.HTTP_OK, conn.getResponseCode());
header = new ShuffleHeader();
header.readFields(input);
input.close();
}
/**
* simulate a reducer that sends an invalid shuffle-header - sometimes a wrong
* header_name and sometimes a wrong version
*
* @throws Exception exception
*/
@Test (timeout = 10000)
public void testIncompatibleShuffleVersion() throws Exception {
final int failureNum = 3;
@ -224,7 +401,12 @@ public void testIncompatibleShuffleVersion() throws Exception {
shuffleHandler.stop();
shuffleHandler.close();
}
/**
* Validate the limit on number of shuffle connections.
*
* @throws Exception exception
*/
@Test (timeout = 10000)
public void testMaxConnections() throws Exception {
@ -236,14 +418,29 @@ public void testMaxConnections() throws Exception {
protected Shuffle getShuffle(Configuration conf) {
// replace the shuffle handler with one stubbed for testing
return new Shuffle(conf) {
@Override
protected MapOutputInfo getMapOutputInfo(String base, String mapId,
int reduce, String user) throws IOException {
// Do nothing.
return null;
}
@Override
protected void populateHeaders(List<String> mapIds, String jobId,
String user, int reduce, HttpRequest request,
HttpResponse response, boolean keepAliveParam,
Map<String, MapOutputInfo> infoMap) throws IOException {
// Do nothing.
}
@Override
protected void verifyRequest(String appid, ChannelHandlerContext ctx,
HttpRequest request, HttpResponse response, URL requestUri)
throws IOException {
// Do nothing.
}
@Override
protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx,
Channel ch, String user, String jobId, String mapId, int reduce)
Channel ch, String user, String mapId, int reduce,
MapOutputInfo info)
throws IOException {
// send a shuffle header and a lot of data down the channel
// to trigger a broken pipe
@ -308,7 +505,13 @@ protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx,
shuffleHandler.stop();
}
/**
* Validate the ownership of the map-output files being pulled in. The
* local-file-system owner of the file should match the user component in the
*
* @throws Exception exception
*/
@Test(timeout = 100000)
public void testMapFileAccess() throws IOException {
// This will run only in NativeIO is enabled as SecureIOUtils need it
@ -323,7 +526,7 @@ public void testMapFileAccess() throws IOException {
TestShuffleHandler.class.getSimpleName() + "LocDir").getAbsoluteFile();
conf.set(YarnConfiguration.NM_LOCAL_DIRS, absLogDir.getAbsolutePath());
ApplicationId appId = ApplicationId.newInstance(12345, 1);
System.out.println(appId.toString());
LOG.info(appId.toString());
String appAttemptId = "attempt_12345_1_m_1_0";
String user = "randomUser";
String reducerId = "0";
@ -341,6 +544,7 @@ protected Shuffle getShuffle(Configuration conf) {
protected void verifyRequest(String appid, ChannelHandlerContext ctx,
HttpRequest request, HttpResponse response, URL requestUri)
throws IOException {
// Do nothing.
}
};
@ -393,7 +597,7 @@ protected void verifyRequest(String appid, ChannelHandlerContext ctx,
}
}
public static void createShuffleHandlerFiles(File logDir, String user,
private static void createShuffleHandlerFiles(File logDir, String user,
String appId, String appAttemptId, Configuration conf,
List<File> fileMap) throws IOException {
String attemptDir =
@ -412,8 +616,8 @@ public static void createShuffleHandlerFiles(File logDir, String user,
createMapOutputFile(mapOutputFile, conf);
}
public static void
createMapOutputFile(File mapOutputFile, Configuration conf)
private static void
createMapOutputFile(File mapOutputFile, Configuration conf)
throws IOException {
FileOutputStream out = new FileOutputStream(mapOutputFile);
out.write("Creating new dummy map output file. Used only for testing"
@ -422,7 +626,7 @@ public static void createShuffleHandlerFiles(File logDir, String user,
out.close();
}
public static void createIndexFile(File indexFile, Configuration conf)
private static void createIndexFile(File indexFile, Configuration conf)
throws IOException {
if (indexFile.exists()) {
System.out.println("Deleting existing file");