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Fixes #558 - HTTP/2 server hangs when thread pool is low on threads.

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Fixed test that was broken after changes for #557.
This commit is contained in:
Simone Bordet 2016-05-16 15:40:35 +02:00
parent dee3331ffb
commit 55e5f74889
1 changed files with 23 additions and 49 deletions
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72
jetty-server/src/test/java/org/eclipse/jetty/server/ThreadStarvationTest.java
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@ -37,7 +37,9 @@ import org.eclipse.jetty.util.thread.ExecutionStrategy;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume;
import org.eclipse.jetty.util.thread.strategy.ProduceExecuteConsume;
import org.junit.*;
import org.junit.After;
import org.junit.Rule;
import org.junit.Test;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertEquals;
@ -165,34 +167,37 @@ public class ThreadStarvationTest
}
@Test
@Ignore
public void testEPCExitsLowThreadsMode() throws Exception
{
prepareServer(new ReadHandler());
Assert.assertEquals(2, _availableThreads);
_threadPool.setMaxThreads(5);
_connector.setExecutionStrategyFactory(new ExecuteProduceConsume.Factory());
_server.start();
System.err.println(_server.dump());
// Two idle threads in the pool here.
// Three idle threads in the pool here.
// The server will accept the socket in normal mode.
Socket client = new Socket("localhost", _connector.getLocalPort());
client.setSoTimeout(10000);
Thread.sleep(500);
// Now steal one thread.
CountDownLatch latch = new CountDownLatch(1);
_threadPool.execute(() ->
// Now steal two threads.
CountDownLatch[] latches = new CountDownLatch[2];
for (int i = 0; i < latches.length; ++i)
{
try
CountDownLatch latch = latches[i] = new CountDownLatch(1);
_threadPool.execute(() ->
{
latch.await();
}
catch (InterruptedException ignored)
{
}
});
try
{
latch.await();
}
catch (InterruptedException ignored)
{
}
});
}
InputStream is = client.getInputStream();
OutputStream os = client.getOutputStream();
@ -218,56 +223,25 @@ public class ThreadStarvationTest
assertTrue(executionStrategy.isLowOnThreads());
}
// Release the stolen thread.
latch.countDown();
// Release the stolen threads.
for (CountDownLatch latch : latches)
latch.countDown();
Thread.sleep(500);
// Send the rest of the body to unblock the reader thread.
// This will be run directly by the selector thread,
// which therefore will remain in low threads mode.
// which then will exit the low threads mode.
os.write("234567890".getBytes(StandardCharsets.UTF_8));
os.flush();
Thread.sleep(500);
System.err.println(_threadPool.dump());
// Back to two idle threads here, but we are still in
// low threads mode because the SelectorProducer has
// not returned from the low threads mode.
String response = IO.toString(is);
assertThat(response, containsString("200 OK"));
assertThat(response, containsString("Read Input 10"));
// Send another request.
// Accepting a new connection will exit the low threads mode.
client = new Socket("localhost", _connector.getLocalPort());
client.setSoTimeout(10000);
Thread.sleep(500);
System.err.println(_threadPool.dump());
for (ManagedSelector selector : _connector.getSelectorManager().getBeans(ManagedSelector.class))
{
ExecuteProduceConsume executionStrategy = (ExecuteProduceConsume)selector.getExecutionStrategy();
assertFalse(executionStrategy.isLowOnThreads());
}
is = client.getInputStream();
os = client.getOutputStream();
request = "" +
"PUT / HTTP/1.0\r\n" +
"Host: localhost\r\n" +
"Content-Length: 10\r\n" +
"\r\n" +
"1234567890";
os.write(request.getBytes(StandardCharsets.UTF_8));
os.flush();
response = IO.toString(is);
assertThat(response, containsString("200 OK"));
assertThat(response, containsString("Read Input 10"));
}
protected static class ReadHandler extends AbstractHandler