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Fixes #1037 - Don't execute AsyncListener.onTimeout events in spare Scheduler-Thread. 

Now calling onTimeout() from pooled threads.
Restored AsyncListener test cases.
This commit is contained in:
Simone Bordet 2016-10-28 12:01:39 +02:00
parent 6f6ccdf061
commit 206122756f
3 changed files with 174 additions and 570 deletions
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3
jetty-server/src/main/java/org/eclipse/jetty/server/AsyncContextEvent.java
View File

@ -27,7 +27,6 @@ import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.eclipse.jetty.server.handler.ContextHandler.Context;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.thread.Scheduler;
public class AsyncContextEvent extends AsyncEvent implements Runnable
@ -162,7 +161,7 @@ public class AsyncContextEvent extends AsyncEvent implements Runnable
Scheduler.Task task=_timeoutTask;
_timeoutTask=null;
if (task!=null)
_state.onTimeout();
_state.getHttpChannel().execute(() -> _state.onTimeout());
}
public void addThrowable(Throwable e)

8
jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannelState.java
View File

@ -282,7 +282,7 @@ public class HttpChannelState
{
listener.onStartAsync(event);
}
catch(Exception e)
catch(Throwable e)
{
// TODO Async Dispatch Error
LOG.warn(e);
@ -540,7 +540,7 @@ public class HttpChannelState
{
listener.onTimeout(event);
}
catch(Exception e)
catch(Throwable e)
{
LOG.debug(e);
event.addThrowable(e);
@ -671,7 +671,7 @@ public class HttpChannelState
{
listener.onError(event);
}
catch(Exception x)
catch(Throwable x)
{
LOG.info("Exception while invoking listener " + listener, x);
}
@ -716,7 +716,7 @@ public class HttpChannelState
{
listener.onComplete(event);
}
catch(Exception e)
catch(Throwable e)
{
LOG.warn(e);
}

733
jetty-servlet/src/test/java/org/eclipse/jetty/servlet/AsyncListenerTest.java
View File

@ -18,631 +18,236 @@
package org.eclipse.jetty.servlet;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;
import java.util.EnumSet;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import javax.servlet.AsyncContext;
import javax.servlet.AsyncEvent;
import javax.servlet.AsyncListener;
import javax.servlet.DispatcherType;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.HttpTester;
import org.eclipse.jetty.server.HttpChannel;
import org.eclipse.jetty.server.HttpChannelState;
import org.eclipse.jetty.server.LocalConnector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.junit.Ignore;
import org.eclipse.jetty.util.log.StacklessLogging;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.junit.After;
import org.junit.Assert;
import org.junit.Test;
@Ignore("Not handling Exceptions during Async very well")
public class AsyncListenerTest
{
// Unique named RuntimeException to help during debugging / assertions
@SuppressWarnings("serial")
public static class FooRuntimeException extends RuntimeException
private QueuedThreadPool threadPool;
private Server server;
private LocalConnector connector;
private String servletPath;
private void start(HttpServlet servlet) throws Exception
{
}
// Unique named Exception to help during debugging / assertions
@SuppressWarnings("serial")
public static class FooException extends Exception
{
}
// Unique named Throwable to help during debugging / assertions
@SuppressWarnings("serial")
public static class FooThrowable extends Throwable
{
}
// Unique named Error to help during debugging / assertions
@SuppressWarnings("serial")
public static class FooError extends Error
{
}
/**
* Basic AsyncListener adapter that simply logs (and makes testcase writing easier)
*/
public static class AsyncListenerAdapter implements AsyncListener
{
private static final Logger LOG = Log.getLogger(AsyncListenerTest.AsyncListenerAdapter.class);
@Override
public void onComplete(AsyncEvent event) throws IOException
{
LOG.info("onComplete({})",event);
}
@Override
public void onTimeout(AsyncEvent event) throws IOException
{
LOG.info("onTimeout({})",event);
}
@Override
public void onError(AsyncEvent event) throws IOException
{
LOG.info("onError({})",event);
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException
{
LOG.info("onStartAsync({})",event);
}
}
/**
* Common ErrorContext for normal and async error handling
*/
public static class ErrorContext implements AsyncListener
{
private static final Logger LOG = Log.getLogger(AsyncListenerTest.ErrorContext.class);
public void report(Throwable t, ServletRequest req, ServletResponse resp) throws IOException
{
if (resp instanceof HttpServletResponse)
{
((HttpServletResponse)resp).setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
resp.setContentType("text/plain");
resp.setCharacterEncoding(StandardCharsets.UTF_8.name());
PrintWriter out = resp.getWriter();
t.printStackTrace(out);
}
private void reportThrowable(AsyncEvent event) throws IOException
{
Throwable t = event.getThrowable();
if (t == null)
{
return;
}
ServletRequest req = event.getAsyncContext().getRequest();
ServletResponse resp = event.getAsyncContext().getResponse();
report(t,req,resp);
}
@Override
public void onComplete(AsyncEvent event) throws IOException
{
LOG.info("onComplete({})",event);
reportThrowable(event);
}
@Override
public void onTimeout(AsyncEvent event) throws IOException
{
LOG.info("onTimeout({})",event);
reportThrowable(event);
}
@Override
public void onError(AsyncEvent event) throws IOException
{
LOG.info("onError({})",event);
reportThrowable(event);
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException
{
LOG.info("onStartAsync({})",event);
reportThrowable(event);
}
}
/**
* Common filter for all test cases that should handle Errors in a consistent way
* regardless of how the exception / error occurred in the servlets in the chain.
*/
public static class ErrorFilter implements Filter
{
private final List<ErrorContext> tracking;
public ErrorFilter(List<ErrorContext> tracking)
{
this.tracking = tracking;
}
@Override
public void destroy()
{
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
ErrorContext err = new ErrorContext();
tracking.add(err);
try
{
chain.doFilter(request,response);
}
catch (Throwable t)
{
err.report(t,request,response);
}
finally
{
if (request.isAsyncStarted())
{
request.getAsyncContext().addListener(err);
}
}
}
@Override
public void init(FilterConfig filterConfig) throws ServletException
{
}
}
/**
* Normal non-async testcase of error handling from a filter
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorNoAsync() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
server = threadPool == null ? new Server() : new Server(threadPool);
connector = new LocalConnector(server);
server.addConnector(connector);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
throw new FooRuntimeException();
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
servletPath = "/async_listener";
context.addServlet(holder, servletPath + "/*");
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
server.stop();
}
server.start();
}
/**
* async testcase of error handling from a filter.
*
* Async Started, then application Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_Exception() throws Exception
@After
public void dispose() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
req.startAsync();
// before listeners are added, toss Exception
throw new FooRuntimeException();
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
if (server != null)
server.stop();
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, add listener that does nothing, then application Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_AddEmptyListener_Exception() throws Exception
public void testOnTimeoutCalledByPooledThread() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
String threadNamePrefix = "async_listener";
threadPool = new QueuedThreadPool();
threadPool.setName(threadNamePrefix);
start(new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.addListener(new AsyncListenerAdapter());
throw new FooRuntimeException();
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
server.stop();
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, add listener that completes only, then application Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_AddListener_Exception() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.addListener(new AsyncListenerAdapter()
{
@Override
public void onError(AsyncEvent event) throws IOException
{
System.err.println("### ONERROR");
event.getThrowable().printStackTrace(System.err);
event.getAsyncContext().complete();
}
});
throw new FooRuntimeException();
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
server.stop();
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, add listener, in onStartAsync throw Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_AddListener_ExceptionDuringOnStart() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.addListener(new AsyncListenerAdapter()
{
@Override
public void onStartAsync(AsyncEvent event) throws IOException
{
throw new FooRuntimeException();
}
});
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
server.stop();
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, add listener, in onComplete throw Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_AddListener_ExceptionDuringOnComplete() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.addListener(new AsyncListenerAdapter()
{
@Override
public void onComplete(AsyncEvent event) throws IOException
{
throw new FooRuntimeException();
}
});
ctx.complete();
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
server.setHandler(context);
try
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
{
server.stop();
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, add listener, in onTimeout throw Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_AddListener_ExceptionDuringOnTimeout() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.setTimeout(1000);
ctx.addListener(new AsyncListenerAdapter()
AsyncContext asyncContext = request.startAsync();
asyncContext.setTimeout(1000);
asyncContext.addListener(new AsyncListenerAdapter()
{
@Override
public void onTimeout(AsyncEvent event) throws IOException
{
throw new FooRuntimeException();
if (Thread.currentThread().getName().startsWith(threadNamePrefix))
response.setStatus(HttpStatus.OK_200);
else
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR_500);
asyncContext.complete();
}
});
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
});
server.setHandler(context);
HttpTester.Response response = HttpTester.parseResponse(connector.getResponse(newRequest("")));
Assert.assertEquals(HttpStatus.OK_200, response.getStatus());
}
try
@Test
public void testOnErrorCalledForExceptionAfterStartAsync() throws Exception
{
RuntimeException exception = new RuntimeException();
start(new HttpServlet()
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
}
finally
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
AsyncContext asyncContext = request.startAsync();
asyncContext.addListener(new AsyncListenerAdapter()
{
@Override
public void onError(AsyncEvent event) throws IOException
{
if (exception == event.getThrowable())
response.setStatus(HttpStatus.OK_200);
else
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR_500);
asyncContext.complete();
}
});
throw exception;
}
});
try (StacklessLogging suppressor = new StacklessLogging(HttpChannel.class))
{
server.stop();
HttpTester.Response response = HttpTester.parseResponse(connector.getResponse(newRequest("")));
Assert.assertEquals(HttpStatus.OK_200, response.getStatus());
}
}
/**
* async testcase of error handling from a filter.
*
* Async Started, no listener, in start() throw Exception
*
* @throws Exception
* on test failure
*/
@Test
public void testFilterErrorAsyncStart_NoListener_ExceptionDuringStart() throws Exception
public void testOnErrorCalledForExceptionThrownByOnTimeout() throws Exception
{
Server server = new Server();
LocalConnector conn = new LocalConnector(server);
conn.setIdleTimeout(10000);
server.addConnector(conn);
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
@SuppressWarnings("serial")
HttpServlet servlet = new HttpServlet()
RuntimeException exception = new RuntimeException();
start(new HttpServlet()
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
AsyncContext ctx = req.startAsync();
ctx.setTimeout(1000);
ctx.start(new Runnable()
AsyncContext asyncContext = request.startAsync();
asyncContext.setTimeout(1000);
asyncContext.addListener(new AsyncListenerAdapter()
{
@Override
public void run()
public void onTimeout(AsyncEvent event) throws IOException
{
throw new FooRuntimeException();
throw exception;
}
@Override
public void onError(AsyncEvent event) throws IOException
{
if (exception == event.getThrowable())
response.setStatus(HttpStatus.OK_200);
else
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR_500);
asyncContext.complete();
}
});
}
};
ServletHolder holder = new ServletHolder(servlet);
holder.setAsyncSupported(true);
context.addServlet(holder,"/err/*");
List<ErrorContext> tracking = new LinkedList<ErrorContext>();
ErrorFilter filter = new ErrorFilter(tracking);
context.addFilter(new FilterHolder(filter),"/*",EnumSet.allOf(DispatcherType.class));
});
server.setHandler(context);
HttpTester.Response response = HttpTester.parseResponse(connector.getResponse(newRequest("")));
Assert.assertEquals(HttpStatus.OK_200, response.getStatus());
}
try
@Test
public void testOnErrorNotCalledForExceptionThrownByOnComplete() throws Exception
{
CountDownLatch errorLatch = new CountDownLatch(1);
start(new HttpServlet()
{
server.start();
String resp = conn.getResponses("GET /err/ HTTP/1.1\n" + "Host: localhost\n" + "Connection: close\n" + "\n");
assertThat("Response status",resp,containsString("HTTP/1.1 500 Server Error"));
assertThat("Response",resp,containsString(FooRuntimeException.class.getName()));
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
AsyncContext asyncContext = request.startAsync();
asyncContext.addListener(new AsyncListenerAdapter()
{
@Override
public void onComplete(AsyncEvent event) throws IOException
{
// Way too late to handle this exception, should only be logged.
throw new Error();
}
@Override
public void onError(AsyncEvent event) throws IOException
{
errorLatch.countDown();
}
});
new Thread(() ->
{
try
{
Thread.sleep(1000);
response.setStatus(HttpStatus.OK_200);
asyncContext.complete();
}
catch (InterruptedException ignored)
{
}
}).start();
}
});
try (StacklessLogging suppressor = new StacklessLogging(HttpChannelState.class))
{
HttpTester.Response response = HttpTester.parseResponse(connector.getResponse(newRequest("")));
Assert.assertEquals(HttpStatus.OK_200, response.getStatus());
Assert.assertFalse(errorLatch.await(1, TimeUnit.SECONDS));
}
finally
}
private String newRequest(String pathInfo)
{
return "" +
"GET " + servletPath + pathInfo + " HTTP/1.1\r\n" +
"Host: localhost\r\n" +
"\r\n";
}
private static class AsyncListenerAdapter implements AsyncListener
{
@Override
public void onTimeout(AsyncEvent event) throws IOException
{
}
@Override
public void onComplete(AsyncEvent event) throws IOException
{
}
@Override
public void onError(AsyncEvent event) throws IOException
{
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException
{
server.stop();
}
}
}