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AMQ-7106 - fix pending stop support by avoiding sync through single shared status var - fix and test

This commit is contained in:
gtully 2018-11-21 10:23:13 +00:00
parent d020af2034
commit 8cc0c5ad6c
3 changed files with 255 additions and 59 deletions
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47
activemq-broker/src/main/java/org/apache/activemq/broker/TransportConnection.java
View File

@ -138,8 +138,14 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
private boolean blocked;
private boolean connected;
private boolean active;
private final AtomicBoolean starting = new AtomicBoolean();
private final AtomicBoolean pendingStop = new AtomicBoolean();
// state management around pending stop
private static final int NEW = 0;
private static final int STARTING = 1;
private static final int STARTED = 2;
private static final int PENDING_STOP = 3;
private final AtomicInteger status = new AtomicInteger(NEW);
private long timeStamp;
private final AtomicBoolean stopping = new AtomicBoolean(false);
private final CountDownLatch stopped = new CountDownLatch(1);
@ -229,7 +235,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
}
public void serviceTransportException(IOException e) {
if (!stopping.get() && !pendingStop.get()) {
if (!stopping.get() && status.get() != PENDING_STOP) {
transportException.set(e);
if (TRANSPORTLOG.isDebugEnabled()) {
TRANSPORTLOG.debug(this + " failed: " + e, e);
@ -303,7 +309,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
}
ConnectionError ce = new ConnectionError();
ce.setException(e);
if (pendingStop.get()) {
if (status.get() == PENDING_STOP) {
dispatchSync(ce);
} else {
dispatchAsync(ce);
@ -321,7 +327,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
boolean responseRequired = command.isResponseRequired();
int commandId = command.getCommandId();
try {
if (!pendingStop.get()) {
if (status.get() != PENDING_STOP) {
response = command.visit(this);
} else {
response = new ExceptionResponse(transportException.get());
@ -993,7 +999,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
@Override
public boolean iterate() {
try {
if (pendingStop.get() || stopping.get()) {
if (status.get() == PENDING_STOP || stopping.get()) {
if (dispatchStopped.compareAndSet(false, true)) {
if (transportException.get() == null) {
try {
@ -1049,9 +1055,9 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
@Override
public void start() throws Exception {
if (status.compareAndSet(NEW, STARTING)) {
try {
synchronized (this) {
starting.set(true);
if (taskRunnerFactory != null) {
taskRunner = taskRunnerFactory.createTaskRunner(this, "ActiveMQ Connection Dispatcher: "
+ getRemoteAddress());
@ -1072,19 +1078,19 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
}
} catch (Exception e) {
// Force clean up on an error starting up.
pendingStop.set(true);
status.set(PENDING_STOP);
throw e;
} finally {
// stop() can be called from within the above block,
// but we want to be sure start() completes before
// stop() runs, so queue the stop until right now:
setStarting(false);
if (isPendingStop()) {
if (!status.compareAndSet(STARTING, STARTED)) {
LOG.debug("Calling the delayed stop() after start() {}", this);
stop();
}
}
}
}
@Override
public void stop() throws Exception {
@ -1099,10 +1105,8 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
public void delayedStop(final int waitTime, final String reason, Throwable cause) {
if (waitTime > 0) {
synchronized (this) {
pendingStop.set(true);
status.compareAndSet(STARTING, PENDING_STOP);
transportException.set(cause);
}
try {
stopTaskRunnerFactory.execute(new Runnable() {
@Override
@ -1128,13 +1132,10 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
public void stopAsync() {
// If we're in the middle of starting then go no further... for now.
synchronized (this) {
pendingStop.set(true);
if (starting.get()) {
if (status.compareAndSet(STARTING, PENDING_STOP)) {
LOG.debug("stopAsync() called in the middle of start(). Delaying till start completes..");
return;
}
}
if (stopping.compareAndSet(false, true)) {
// Let all the connection contexts know we are shutting down
// so that in progress operations can notice and unblock.
@ -1342,7 +1343,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
* @return true if the Connection is starting
*/
public boolean isStarting() {
return starting.get();
return status.get() == STARTING;
}
@Override
@ -1355,19 +1356,11 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
return this.faultTolerantConnection;
}
protected void setStarting(boolean starting) {
this.starting.set(starting);
}
/**
* @return true if the Connection needs to stop
*/
public boolean isPendingStop() {
return pendingStop.get();
}
protected void setPendingStop(boolean pendingStop) {
this.pendingStop.set(pendingStop);
return status.get() == PENDING_STOP;
}
private NetworkBridgeConfiguration getNetworkConfiguration(final BrokerInfo info) throws IOException {

2
activemq-mqtt/src/main/java/org/apache/activemq/transport/mqtt/MQTTInactivityMonitor.java
View File

@ -78,7 +78,7 @@ public class MQTTInactivityMonitor extends TransportFilter {
ASYNC_TASKS.execute(new Runnable() {
@Override
public void run() {
onException(new InactivityIOException("Channel was inactive for too (>" + (readKeepAliveTime + readGraceTime) + ") long: "
onException(new InactivityIOException("CONNECT frame not received with in connectionTimeout (>" + connectionTimeout + "): "
+ next.getRemoteAddress()));
}
});

203
activemq-unit-tests/src/test/java/org/apache/activemq/transport/tcp/TcpTransportInactiveDuringHandshakeTest.java Normal file
View File

@ -0,0 +1,203 @@
/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.activemq.transport.tcp;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.util.DefaultTestAppender;
import org.apache.activemq.util.Wait;
import org.apache.log4j.Level;
import org.apache.log4j.spi.LoggingEvent;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.LoggerFactory;
import javax.net.ssl.*;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertTrue;
public class TcpTransportInactiveDuringHandshakeTest {
private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(TcpTransportInactiveDuringHandshakeTest.class);
public static final String KEYSTORE_TYPE = "jks";
public static final String PASSWORD = "password";
public static final String SERVER_KEYSTORE = "src/test/resources/server.keystore";
public static final String TRUST_KEYSTORE = "src/test/resources/client.keystore";
static {
System.setProperty("javax.net.ssl.trustStore", TRUST_KEYSTORE);
System.setProperty("javax.net.ssl.trustStorePassword", PASSWORD);
System.setProperty("javax.net.ssl.trustStoreType", KEYSTORE_TYPE);
System.setProperty("javax.net.ssl.keyStore", SERVER_KEYSTORE);
System.setProperty("javax.net.ssl.keyStorePassword", PASSWORD);
System.setProperty("javax.net.ssl.keyStoreType", KEYSTORE_TYPE);
}
private BrokerService brokerService;
private DefaultTestAppender appender;
CountDownLatch inactivityMonitorFired = new CountDownLatch(1);
CountDownLatch handShakeComplete = new CountDownLatch(1);
@Before
public void before() throws Exception {
brokerService = new BrokerService();
brokerService.setPersistent(false);
brokerService.setUseJmx(false);
appender = new DefaultTestAppender() {
@Override
public void doAppend(LoggingEvent event) {
if (event.getLevel().equals(Level.WARN) && event.getRenderedMessage().contains("InactivityIOException")) {
inactivityMonitorFired.countDown();
}
}
};
org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger();
rootLogger.addAppender(appender);
}
@After
public void after() throws Exception {
org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger();
rootLogger.removeAppender(appender);
if (brokerService != null) {
brokerService.stop();
brokerService.waitUntilStopped();
}
}
@Test(timeout = 60000)
public void testInactivityMonitorThreadCompletesWhenFiringDuringStart() throws Exception {
brokerService.addConnector("mqtt+nio+ssl://localhost:0?transport.connectAttemptTimeout=1000&transport.closeAsync=false");
brokerService.start();
brokerService.waitUntilStarted();
TransportConnector transportConnector = brokerService.getTransportConnectors().get(0);
URI uri = transportConnector.getPublishableConnectURI();
CountDownLatch blockHandShakeCompletion = new CountDownLatch(1);
TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
LOG.info("Check Server Trusted: " + s, new Throwable("HERE"));
try {
blockHandShakeCompletion.await(20, TimeUnit.SECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
LOG.info("Check Server Trusted done!");
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
}};
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagers, new SecureRandom());
final SSLSocket sslSocket = (SSLSocket) sslContext.getSocketFactory().createSocket("127.0.0.1", uri.getPort());
sslSocket.addHandshakeCompletedListener(new HandshakeCompletedListener() {
@Override
public void handshakeCompleted(HandshakeCompletedEvent handshakeCompletedEvent) {
handShakeComplete.countDown();
}
});
Executors.newCachedThreadPool().submit(new Runnable() {
@Override
public void run() {
try {
sslSocket.startHandshake();
assertTrue("Socket connected", sslSocket.isConnected());
} catch (IOException oops) {
oops.printStackTrace();
}
}
});
assertTrue("inactivity fired", inactivityMonitorFired.await(10, TimeUnit.SECONDS));
assertTrue("Found non blocked inactivity monitor thread - done its work", Wait.waitFor(new Wait.Condition() {
@Override
public boolean isSatisified() throws Exception {
// verify no InactivityMonitor Task blocked
Thread[] threads = new Thread[20];
int activeCount = Thread.currentThread().getThreadGroup().enumerate(threads);
for (int i = 0; i<activeCount; i++) {
Thread thread = threads[i];
LOG.info("T[" + i++ + "]: " + thread);
if (thread.getName().contains("InactivityMonitor") && thread.getState().equals(Thread.State.TIMED_WAITING)) {
LOG.info("Found inactivity monitor in timed-wait");
// good
return true;
}
}
return false;
}
}));
// allow handshake to complete
blockHandShakeCompletion.countDown();
final OutputStream socketOutPutStream = sslSocket.getOutputStream();
assertTrue("Handshake complete", handShakeComplete.await(10, TimeUnit.SECONDS));
// wait for socket to be closed via Inactivity monitor
assertTrue("socket error", Wait.waitFor(new Wait.Condition() {
@Override
public boolean isSatisified() throws Exception {
LOG.info("Expecting socket to error from remote close: " + sslSocket);
try {
socketOutPutStream.write(2);
socketOutPutStream.flush();
} catch (IOException expected) {
return true;
}
return false;
}
}));
LOG.info("Socket at end: " + sslSocket);
sslSocket.close();
}
}