Undertow proxy handler + RequestLimit handler issue
by paroczizs
Hi Undertow Dev,
we built a custom integration component based on Wildfly 11 with Undertow
1.4.18. The application contains a couple of custom and built in handlers.
We found the following:
There is a RequestLimit handler right at the beginning and finally the
proxy handler. When the backend getting to be slow and the load is
relatively high the RequestLimit handler does its job queues the request
then throws the request above the queue. When the proxy times out it starts
to consume the queue, in some cases the exception below occurs and we found
that in this case the counter in the RequestLimit handler is not reduced
and the it can stuck the way to the backend.
Are there any possibility to handle the exception in a custom handler?
Thank you in advance, Zsolt
2018-11-28 12:02:19,518 ERROR [io.undertow.proxy] (default I/O-2) UT005028:
Proxy request to /lwi/optinus/getentityanswersservice failed:
java.nio.channels.ClosedChannelException
at
io.undertow.client.http.HttpClientConnection$5.handleEvent(HttpClientConnection.java:194)
at
io.undertow.client.http.HttpClientConnection$5.handleEvent(HttpClientConnection.java:173)
at
org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
at
org.xnio.StreamConnection.invokeCloseListener(StreamConnection.java:80)
at org.xnio.Connection.close(Connection.java:142)
at org.xnio.IoUtils.safeClose(IoUtils.java:152)
at io.undertow.util.ConnectionUtils$3.run(ConnectionUtils.java:102)
at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612)
at org.xnio.nio.WorkerThread.run(WorkerThread.java:479)
2 weeks, 4 days
Creating a websocket proxy with undertow
by Marc Boorshtein
Using the 1.4 series, I'm trying to handle upgrade and websockets. Looking
at a few examples and the code I think what I need to do is:
1. add the WebSocketServlet to the right path
2. implement WebSocketConnectionCallback that will call my remote ws://
server
Am I on the right track? I haven't found an example of doing this with
undertow but found something similar with jetty (
https://github.com/chipster/chipster-web-server/blob/master/src/main/java...)
but I havne't found the same thing for undertow so any pointers would be
appreciated.
Thanks
Marc Boorshtein
1 month, 2 weeks
Issue with Undertow Client and SSL
by Thomas Segismont
Hi,
Openshift Origin uses Hawkular Metrics to store node and container data. In
this scenario, Hawkular Metrics calls the Kubernetes master server over
HTTPS to validate the client identity. This is implemented with Undertow
Client, as part of a ServletExtension (inside Wildfly 10) [1]. Works fine
in development and testing.
Now the Openshit team sees errors in the logs [2][3]. I couldn't reproduce
yet. Errors come in pair, first the "UT005001: An exception occurred
processing the request: java.lang.IllegalStateException: XNIO000017: Buffer
was already freed", and just after "XNIO001007: A channel event listener
threw an exception: java.lang.NullPointerException".
Does that ring a bell? I haven't been able to find a starting point by
looking into the source the code.
Thanks
--
Thomas Segismont
JBoss ON Engineering Team
[1] https://git.io/vrNyP
[2] https://issues.jboss.org/browse/HWKMETRICS-408
[3] https://issues.jboss.org/secure/attachment/12405779/hawkular.log
2 months, 2 weeks
Correctly shutting down a websocket handler
by Robin Anil
When a client disconnects, I see that onClose is not being fired. The only
way this seems to be firing if client sents a close frame.
Is there any way to detect disconnection and immediately close all the
opened resources.
Robin
Robin Anil | Software Engineer
2 years, 8 months
UNDERTOW-1573
by Alec Henninger
Hi all,
I wrote a bug report for UNDERTOW-1573:
https://issues.jboss.org/browse/UNDERTOW-1573
I'm happy to contribute a fix, however I'm not an expert in Undertow so
wanted to run by the dev list first.
A few things come to mind:
- Why are request attributes cleared at all? Can we keep them and let them
be GC'd later?
- If they do need to be cleared, could the clearing itself be done via an
exchange completion listener (assuming we can add it late and be sure it
will run after the access log completion listener)?
Thanks!
Alec
--
ALEC HENNINGER
HE/HIM/HIS
SR. SOFTWARE APPLICATIONS ENGINEER
Raleigh, NC
mobile: 570-856-2428
irc: alec
<https://red.ht/sig>
6 years, 8 months
When to use RequireWelcomeFileMapping
by Brad Wood
I have some questions about when I should be using the following:
servletInfo.setRequireWelcomeFileMapping(true)
I can't find any documentation or comments in the code that help me answer
exactly what that setting does and when to use it. I'm parsing a web.xml
file and creating the proper deployment from it, but I'm unsure when to set
the option above since there is no corresponding attribute or tag in a
web.xml along those lines.
I did find this comment in a code sample online
//if the JSP servlet is mapped to a path that ends in /*
//we want to perform welcome file matches if the directory is requested
*(
https://jar-download.com/artifacts/io.undertow/undertow-jsp/1.0.0.Beta27/...
<https://jar-download.com/artifacts/io.undertow/undertow-jsp/1.0.0.Beta27/...>
)*
but my app server has more than one servlet mapping with URL filters ending
with /* and the welcome file list should only apply to one of them so it
doesn't seem correct that ALL url filters ending in /* should set that. I'm
unclear on whether the welcome files are attempted up front or only if a
matching url filter isn't found.
Thanks!
~Brad
*Developer Advocate*
*Ortus Solutions, Corp *
E-mail: brad(a)coldbox.org
ColdBox Platform: http://www.coldbox.org
Blog: http://www.codersrevolution.com
6 years, 9 months
Get HttpServerConnection create time
by Huibing Yin
Hi,
I have a servlet application that would like to know when the underlying HTTP connectionhas been established.
In the jetty, I could use the following code:
HttpConnection connection = (HttpConnection) request.getAttribute(HttpConnection.class.getName());
long connectedAt = connection.getCreatedTimeStamp();
How to do it in the undertow? Any help/suggestions are appreciated.
Thanks
6 years, 9 months
