/**
* 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.ipc;
import java.io.IOException;
import java.net.ConnectException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Method;
import java.util.Arrays;
import junit.framework.TestCase;
import org.apache.commons.logging.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.io.UTF8;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.authorize.AuthorizationException;
import org.apache.hadoop.security.authorize.PolicyProvider;
import org.apache.hadoop.security.authorize.Service;
import org.apache.hadoop.security.AccessControlException;
import com.google.protobuf.DescriptorProtos;
import com.google.protobuf.DescriptorProtos.EnumDescriptorProto;
import static org.apache.hadoop.test.MetricsAsserts.*;
import static org.mockito.Mockito.*;
/** Unit tests for RPC. */
public class TestRPC extends TestCase {
private static final String ADDRESS = "0.0.0.0";
public static final Log LOG =
LogFactory.getLog(TestRPC.class);
private static Configuration conf = new Configuration();
int datasize = 1024*100;
int numThreads = 50;
public TestRPC(String name) { super(name); }
public interface TestProtocol extends VersionedProtocol {
public static final long versionID = 1L;
void ping() throws IOException;
void slowPing(boolean shouldSlow) throws IOException;
String echo(String value) throws IOException;
String[] echo(String[] value) throws IOException;
Writable echo(Writable value) throws IOException;
int add(int v1, int v2) throws IOException;
int add(int[] values) throws IOException;
int error() throws IOException;
void testServerGet() throws IOException;
int[] exchange(int[] values) throws IOException;
DescriptorProtos.EnumDescriptorProto exchangeProto(
DescriptorProtos.EnumDescriptorProto arg);
}
public static class TestImpl implements TestProtocol {
int fastPingCounter = 0;
public long getProtocolVersion(String protocol, long clientVersion) {
return TestProtocol.versionID;
}
public ProtocolSignature getProtocolSignature(String protocol, long clientVersion,
int hashcode) {
return new ProtocolSignature(TestProtocol.versionID, null);
}
public void ping() {}
public synchronized void slowPing(boolean shouldSlow) {
if (shouldSlow) {
while (fastPingCounter < 2) {
try {
wait(); // slow response until two fast pings happened
} catch (InterruptedException ignored) {}
}
fastPingCounter -= 2;
} else {
fastPingCounter++;
notify();
}
}
public String echo(String value) throws IOException { return value; }
public String[] echo(String[] values) throws IOException { return values; }
public Writable echo(Writable writable) {
return writable;
}
public int add(int v1, int v2) {
return v1 + v2;
}
public int add(int[] values) {
int sum = 0;
for (int i = 0; i < values.length; i++) {
sum += values[i];
}
return sum;
}
public int error() throws IOException {
throw new IOException("bobo");
}
public void testServerGet() throws IOException {
if (!(Server.get() instanceof RPC.Server)) {
throw new IOException("Server.get() failed");
}
}
public int[] exchange(int[] values) {
for (int i = 0; i < values.length; i++) {
values[i] = i;
}
return values;
}
@Override
public EnumDescriptorProto exchangeProto(EnumDescriptorProto arg) {
return arg;
}
}
//
// an object that does a bunch of transactions
//
static class Transactions implements Runnable {
int datasize;
TestProtocol proxy;
Transactions(TestProtocol proxy, int datasize) {
this.proxy = proxy;
this.datasize = datasize;
}
// do two RPC that transfers data.
public void run() {
int[] indata = new int[datasize];
int[] outdata = null;
int val = 0;
try {
outdata = proxy.exchange(indata);
val = proxy.add(1,2);
} catch (IOException e) {
assertTrue("Exception from RPC exchange() " + e, false);
}
assertEquals(indata.length, outdata.length);
assertEquals(val, 3);
for (int i = 0; i < outdata.length; i++) {
assertEquals(outdata[i], i);
}
}
}
//
// A class that does an RPC but does not read its response.
//
static class SlowRPC implements Runnable {
private TestProtocol proxy;
private volatile boolean done;
SlowRPC(TestProtocol proxy) {
this.proxy = proxy;
done = false;
}
boolean isDone() {
return done;
}
public void run() {
try {
proxy.slowPing(true); // this would hang until two fast pings happened
done = true;
} catch (IOException e) {
assertTrue("SlowRPC ping exception " + e, false);
}
}
}
public void testConfRpc() throws Exception {
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 1, false, conf, null);
// Just one handler
int confQ = conf.getInt(
CommonConfigurationKeys.IPC_SERVER_HANDLER_QUEUE_SIZE_KEY,
CommonConfigurationKeys.IPC_SERVER_HANDLER_QUEUE_SIZE_DEFAULT);
assertEquals(confQ, server.getMaxQueueSize());
int confReaders = conf.getInt(
CommonConfigurationKeys.IPC_SERVER_RPC_READ_THREADS_KEY,
CommonConfigurationKeys.IPC_SERVER_RPC_READ_THREADS_DEFAULT);
assertEquals(confReaders, server.getNumReaders());
server.stop();
server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 1, 3, 200, false, conf, null);
assertEquals(3, server.getNumReaders());
assertEquals(200, server.getMaxQueueSize());
server.stop();
}
public void testProxyAddress() throws Exception {
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, conf);
TestProtocol proxy = null;
try {
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
// create a client
proxy = (TestProtocol)RPC.getProxy(
TestProtocol.class, TestProtocol.versionID, addr, conf);
assertEquals(addr, RPC.getServerAddress(proxy));
} finally {
server.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
}
}
public void testSlowRpc() throws Exception {
System.out.println("Testing Slow RPC");
// create a server with two handlers
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 2, false, conf, null);
TestProtocol proxy = null;
try {
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
// create a client
proxy = (TestProtocol)RPC.getProxy(
TestProtocol.class, TestProtocol.versionID, addr, conf);
SlowRPC slowrpc = new SlowRPC(proxy);
Thread thread = new Thread(slowrpc, "SlowRPC");
thread.start(); // send a slow RPC, which won't return until two fast pings
assertTrue("Slow RPC should not have finished1.", !slowrpc.isDone());
proxy.slowPing(false); // first fast ping
// verify that the first RPC is still stuck
assertTrue("Slow RPC should not have finished2.", !slowrpc.isDone());
proxy.slowPing(false); // second fast ping
// Now the slow ping should be able to be executed
while (!slowrpc.isDone()) {
System.out.println("Waiting for slow RPC to get done.");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
}
} finally {
server.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
System.out.println("Down slow rpc testing");
}
}
public void testRPCConf(Configuration conf) throws Exception {
}
public void testCalls(Configuration conf) throws Exception {
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, conf);
TestProtocol proxy = null;
try {
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
proxy = (TestProtocol)RPC.getProxy(
TestProtocol.class, TestProtocol.versionID, addr, conf);
proxy.ping();
String stringResult = proxy.echo("foo");
assertEquals(stringResult, "foo");
stringResult = proxy.echo((String)null);
assertEquals(stringResult, null);
// Check rpcMetrics
MetricsRecordBuilder rb = getMetrics(server.rpcMetrics.name());
assertCounter("RpcProcessingTimeNumOps", 3L, rb);
assertCounterGt("SentBytes", 0L, rb);
assertCounterGt("ReceivedBytes", 0L, rb);
// Number of calls to echo method should be 2
rb = getMetrics(server.rpcDetailedMetrics.name());
assertCounter("EchoNumOps", 2L, rb);
// Number of calls to ping method should be 1
assertCounter("PingNumOps", 1L, rb);
String[] stringResults = proxy.echo(new String[]{"foo","bar"});
assertTrue(Arrays.equals(stringResults, new String[]{"foo","bar"}));
stringResults = proxy.echo((String[])null);
assertTrue(Arrays.equals(stringResults, null));
UTF8 utf8Result = (UTF8)proxy.echo(new UTF8("hello world"));
assertEquals(utf8Result, new UTF8("hello world"));
utf8Result = (UTF8)proxy.echo((UTF8)null);
assertEquals(utf8Result, null);
int intResult = proxy.add(1, 2);
assertEquals(intResult, 3);
intResult = proxy.add(new int[] {1, 2});
assertEquals(intResult, 3);
// Test protobufs
EnumDescriptorProto sendProto =
EnumDescriptorProto.newBuilder().setName("test").build();
EnumDescriptorProto retProto = proxy.exchangeProto(sendProto);
assertEquals(sendProto, retProto);
assertNotSame(sendProto, retProto);
boolean caught = false;
try {
proxy.error();
} catch (IOException e) {
if(LOG.isDebugEnabled()) {
LOG.debug("Caught " + e);
}
caught = true;
}
assertTrue(caught);
proxy.testServerGet();
// create multiple threads and make them do large data transfers
System.out.println("Starting multi-threaded RPC test...");
server.setSocketSendBufSize(1024);
Thread threadId[] = new Thread[numThreads];
for (int i = 0; i < numThreads; i++) {
Transactions trans = new Transactions(proxy, datasize);
threadId[i] = new Thread(trans, "TransactionThread-" + i);
threadId[i].start();
}
// wait for all transactions to get over
System.out.println("Waiting for all threads to finish RPCs...");
for (int i = 0; i < numThreads; i++) {
try {
threadId[i].join();
} catch (InterruptedException e) {
i--; // retry
}
}
// try some multi-calls
Method echo =
TestProtocol.class.getMethod("echo", new Class[] { String.class });
String[] strings = (String[])RPC.call(echo, new String[][]{{"a"},{"b"}},
new InetSocketAddress[] {addr, addr}, conf);
assertTrue(Arrays.equals(strings, new String[]{"a","b"}));
Method ping = TestProtocol.class.getMethod("ping", new Class[] {});
Object[] voids = RPC.call(ping, new Object[][]{{},{}},
new InetSocketAddress[] {addr, addr}, conf);
assertEquals(voids, null);
} finally {
server.stop();
if(proxy!=null) RPC.stopProxy(proxy);
}
}
public void testStandaloneClient() throws IOException {
try {
TestProtocol proxy = RPC.waitForProxy(TestProtocol.class,
TestProtocol.versionID, new InetSocketAddress(ADDRESS, 20), conf, 15000L);
proxy.echo("");
fail("We should not have reached here");
} catch (ConnectException ioe) {
//this is what we expected
}
}
private static final String ACL_CONFIG = "test.protocol.acl";
private static class TestPolicyProvider extends PolicyProvider {
@Override
public Service[] getServices() {
return new Service[] { new Service(ACL_CONFIG, TestProtocol.class) };
}
}
private void doRPCs(Configuration conf, boolean expectFailure) throws Exception {
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 5, true, conf, null);
server.refreshServiceAcl(conf, new TestPolicyProvider());
TestProtocol proxy = null;
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
try {
proxy = (TestProtocol)RPC.getProxy(
TestProtocol.class, TestProtocol.versionID, addr, conf);
proxy.ping();
if (expectFailure) {
fail("Expect RPC.getProxy to fail with AuthorizationException!");
}
} catch (RemoteException e) {
if (expectFailure) {
assertTrue(e.unwrapRemoteException() instanceof AuthorizationException);
} else {
throw e;
}
} finally {
server.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
MetricsRecordBuilder rb = getMetrics(server.rpcMetrics.name());
if (expectFailure) {
assertCounter("RpcAuthorizationFailures", 1, rb);
} else {
assertCounter("RpcAuthorizationSuccesses", 1, rb);
}
//since we don't have authentication turned ON, we should see
// 0 for the authentication successes and 0 for failure
assertCounter("RpcAuthenticationFailures", 0, rb);
assertCounter("RpcAuthenticationSuccesses", 0, rb);
}
}
public void testServerAddress() throws IOException {
Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 5, true, conf, null);
InetSocketAddress bindAddr = null;
try {
bindAddr = NetUtils.getConnectAddress(server);
} finally {
server.stop();
}
assertEquals(bindAddr.getAddress(), InetAddress.getLocalHost());
}
public void testAuthorization() throws Exception {
Configuration conf = new Configuration();
conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION,
true);
// Expect to succeed
conf.set(ACL_CONFIG, "*");
doRPCs(conf, false);
// Reset authorization to expect failure
conf.set(ACL_CONFIG, "invalid invalid");
doRPCs(conf, true);
conf.setInt(CommonConfigurationKeys.IPC_SERVER_RPC_READ_THREADS_KEY, 2);
// Expect to succeed
conf.set(ACL_CONFIG, "*");
doRPCs(conf, false);
// Reset authorization to expect failure
conf.set(ACL_CONFIG, "invalid invalid");
doRPCs(conf, true);
}
/**
* Switch off setting socketTimeout values on RPC sockets.
* Verify that RPC calls still work ok.
*/
public void testNoPings() throws Exception {
Configuration conf = new Configuration();
conf.setBoolean("ipc.client.ping", false);
new TestRPC("testnoPings").testCalls(conf);
conf.setInt(CommonConfigurationKeys.IPC_SERVER_RPC_READ_THREADS_KEY, 2);
new TestRPC("testnoPings").testCalls(conf);
}
/**
* Test stopping a non-registered proxy
* @throws Exception
*/
public void testStopNonRegisteredProxy() throws Exception {
RPC.stopProxy(mock(TestProtocol.class));
}
public void testErrorMsgForInsecureClient() throws Exception {
final Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 5, true, conf, null);
server.enableSecurity();
server.start();
boolean succeeded = false;
final InetSocketAddress addr = NetUtils.getConnectAddress(server);
TestProtocol proxy = null;
try {
proxy = (TestProtocol) RPC.getProxy(TestProtocol.class,
TestProtocol.versionID, addr, conf);
proxy.echo("");
} catch (RemoteException e) {
LOG.info("LOGGING MESSAGE: " + e.getLocalizedMessage());
assertTrue(e.unwrapRemoteException() instanceof AccessControlException);
succeeded = true;
} finally {
server.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
}
assertTrue(succeeded);
conf.setInt(CommonConfigurationKeys.IPC_SERVER_RPC_READ_THREADS_KEY, 2);
final Server multiServer = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 5, true, conf, null);
multiServer.enableSecurity();
multiServer.start();
succeeded = false;
final InetSocketAddress mulitServerAddr =
NetUtils.getConnectAddress(multiServer);
proxy = null;
try {
proxy = (TestProtocol) RPC.getProxy(TestProtocol.class,
TestProtocol.versionID, mulitServerAddr, conf);
proxy.echo("");
} catch (RemoteException e) {
LOG.info("LOGGING MESSAGE: " + e.getLocalizedMessage());
assertTrue(e.unwrapRemoteException() instanceof AccessControlException);
succeeded = true;
} finally {
multiServer.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
}
assertTrue(succeeded);
}
/**
* Count the number of threads that have a stack frame containing
* the given string
*/
private static int countThreads(String search) {
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
int count = 0;
ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);
for (ThreadInfo info : infos) {
if (info == null) continue;
for (StackTraceElement elem : info.getStackTrace()) {
if (elem.getClassName().contains(search)) {
count++;
break;
}
}
}
return count;
}
/**
* Test that server.stop() properly stops all threads
*/
public void testStopsAllThreads() throws Exception {
int threadsBefore = countThreads("Server$Listener$Reader");
assertEquals("Expect no Reader threads running before test",
0, threadsBefore);
final Server server = RPC.getServer(TestProtocol.class,
new TestImpl(), ADDRESS, 0, 5, true, conf, null);
server.start();
try {
int threadsRunning = countThreads("Server$Listener$Reader");
assertTrue(threadsRunning > 0);
} finally {
server.stop();
}
int threadsAfter = countThreads("Server$Listener$Reader");
assertEquals("Expect no Reader threads left running after test",
0, threadsAfter);
}
public static void main(String[] args) throws Exception {
new TestRPC("test").testCalls(conf);
}
}