package org.jgroups.tests;
import org.jgroups.Global;
import org.jgroups.JChannel;
import org.jgroups.Message;
import org.jgroups.ReceiverAdapter;
import org.jgroups.protocols.*;
import org.jgroups.protocols.pbcast.GMS;
import org.jgroups.protocols.pbcast.NAKACK2;
import org.jgroups.protocols.pbcast.STABLE;
import org.jgroups.stack.GossipRouter;
import org.jgroups.util.Promise;
import org.jgroups.util.ResourceManager;
import org.jgroups.util.StackType;
import org.jgroups.util.Util;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.net.InetAddress;
/**
* Test designed to make sure the TUNNEL doesn't lock the client and the GossipRouter
* under heavy load.
*
* @author Ovidiu Feodorov <ovidiu@feodorov.com>
* @see TUNNELDeadLockTest#testStress
*/
@Test(groups={Global.STACK_INDEPENDENT, Global.GOSSIP_ROUTER, Global.EAP_EXCLUDED},singleThreaded=true)
public class TUNNELDeadLockTest extends ChannelTestBase {
private JChannel channel;
private Promise<Boolean> promise;
private int receivedCnt;
// the total number of the messages pumped down the channel
private static final int msgCount=20000;
// the message payload size (in bytes);
private static final int payloadSize=32;
// the time (in ms) the main thread waits for all the messages to arrive,
// before declaring the test failed.
private static final int mainTimeout=60000;
GossipRouter gossipRouter;
private int gossip_router_port;
private String gossip_router_hosts;
@BeforeMethod
void setUp() throws Exception {
StackType type=Util.getIpStackType();
if(type == StackType.IPv6)
bind_addr="::1";
else
bind_addr="127.0.0.1";
promise=new Promise<Boolean>();
gossip_router_port=ResourceManager.getNextTcpPort(InetAddress.getByName(bind_addr));
gossip_router_hosts=bind_addr + "[" + gossip_router_port + "]";
gossipRouter=new GossipRouter(gossip_router_port, bind_addr);
gossipRouter.start();
}
@AfterMethod(alwaysRun=true)
void tearDown() throws Exception {
// I prefer to close down the channel inside the test itself, for the
// reason that the channel might be brought in an uncloseable state by
// the test.
// TO_DO: no elegant way to stop the Router threads and clean-up
// resources. Use the Router administrative interface, when available.
Util.close(channel);
promise.reset();
promise=null;
gossipRouter.stop();
System.out.println("Router stopped");
}
/**
* Pushes messages down the channel as fast as possible. Sometimes this
* manages to bring the channel and the Router into deadlock. On the
* machine I run it usually happens after 700 - 1000 messages and I
* suspect that this number it is related to the socket buffer size.
* (the comments are written when I didn't solve the bug yet). <br>
* <p/>
* The number of messages sent can be controlled with msgCount.
* The time (in ms) the main threads wait for the all messages to come can
* be controlled with mainTimeout. If this time passes and the test
* doesn't see all the messages, it declares itself failed.
*/
@Test
public void testStress() throws Exception {
channel=createTunnelChannel("A");
channel.connect("agroup");
channel.setReceiver(new ReceiverAdapter() {
@Override
public void receive(Message msg) {
receivedCnt++;
if(receivedCnt % 2000 == 0)
System.out.println("-- received " + receivedCnt);
if(receivedCnt == msgCount) {
// let the main thread know I got all msgs
promise.setResult(Boolean.TRUE);
}
}
});
// stress send messages - the sender thread
new Thread(new Runnable() {
public void run() {
try {
for(int i=0; i < msgCount; i++) {
channel.send(null, new byte[payloadSize]);
if(i % 2000 == 0)
System.out.println("-- sent " + i);
}
}
catch(Exception e) {
System.err.println("Error sending data over ...");
e.printStackTrace();
}
}
}).start();
// wait for all the messages to come; if I don't see all of them in
// mainTimeout ms, I fail the test
Boolean result=promise.getResult(mainTimeout);
if(result == null) {
String msg="The channel has failed to send/receive " + msgCount + " messages " +
"possibly because of the channel deadlock or too short " +
"timeout (currently " + mainTimeout + " ms). " + receivedCnt +
" messages received so far.";
assert false : msg;
}
}
protected JChannel createTunnelChannel(String name) throws Exception {
TUNNEL tunnel=(TUNNEL)new TUNNEL().setValue("bind_addr", InetAddress.getByName(bind_addr));
tunnel.setGossipRouterHosts(gossip_router_hosts);
JChannel ch=Util.createChannel(tunnel,
new PING(),
new MERGE3().setValue("min_interval", 1000).setValue("max_interval", 3000),
new FD().setValue("timeout", 2000).setValue("max_tries", 2),
new VERIFY_SUSPECT(),
new NAKACK2().setValue("use_mcast_xmit", false),
new UNICAST3(), new STABLE(), new GMS().joinTimeout(1000));
if(name != null)
ch.setName(name);
return ch;
}
}