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Fix #6227 Async timeout dispatch race (#6228) (#6231) 

Fix #6227 Async timeout dispatch race
Only allow the thread calling onTimeout to call dispatch and complete once timeout has expired.
Signed-off-by: Greg Wilkins <gregw@webtide.com>
This commit is contained in:
Greg Wilkins 2021-05-06 07:45:27 +10:00 committed by GitHub
parent 2b78094546
commit 1263732576
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 47 additions and 27 deletions
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20
jetty-server/src/main/java/org/eclipse/jetty/server/HttpChannelState.java
View File

@ -147,6 +147,7 @@ public class HttpChannelState
private boolean _asyncWritePossible;
private long _timeoutMs = DEFAULT_TIMEOUT;
private AsyncContextEvent _event;
private Thread _onTimeoutThread;
protected HttpChannelState(HttpChannel channel)
{
@ -573,7 +574,10 @@ public class HttpChannelState
switch (_requestState)
{
case ASYNC:
break;
case EXPIRING:
if (Thread.currentThread() != _onTimeoutThread)
throw new IllegalStateException(this.getStatusStringLocked());
break;
default:
throw new IllegalStateException(this.getStatusStringLocked());
@ -637,8 +641,11 @@ public class HttpChannelState
throw new IllegalStateException(toStringLocked());
event = _event;
listeners = _asyncListeners;
_onTimeoutThread = Thread.currentThread();
}
try
{
if (listeners != null)
{
Runnable task = new Runnable()
@ -672,6 +679,14 @@ public class HttpChannelState
runInContext(event, task);
}
}
finally
{
synchronized (this)
{
_onTimeoutThread = null;
}
}
}
public void complete()
{
@ -686,6 +701,11 @@ public class HttpChannelState
switch (_requestState)
{
case EXPIRING:
if (Thread.currentThread() != _onTimeoutThread)
throw new IllegalStateException(this.getStatusStringLocked());
_requestState = _sendError ? RequestState.BLOCKING : RequestState.COMPLETE;
break;
case ASYNC:
_requestState = _sendError ? RequestState.BLOCKING : RequestState.COMPLETE;
break;

10
jetty-servlets/src/main/java/org/eclipse/jetty/servlets/QoSFilter.java
View File

@ -230,8 +230,8 @@ public class QoSFilter implements Filter
}
catch (IllegalStateException x)
{
LOG.warn("Unable to resume suspended dispatch", x);
continue;
if (LOG.isDebugEnabled())
LOG.debug("dispatch failed", x);
}
}
}
@ -356,12 +356,12 @@ public class QoSFilter implements Filter
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException
public void onStartAsync(AsyncEvent event)
{
}
@Override
public void onComplete(AsyncEvent event) throws IOException
public void onComplete(AsyncEvent event)
{
}
@ -377,7 +377,7 @@ public class QoSFilter implements Filter
}
@Override
public void onError(AsyncEvent event) throws IOException
public void onError(AsyncEvent event)
{
}
}