-Original Message-
From: Konstantin Kolinko
Sent: Friday, June 11, 2010 4:46 AM
To: Tomcat Users List
Subject: Re: Connection is closed when CometEvent.close is
called during an event
Regarding Comet + Keep-Alive, if it does not work, it is worth filing
an enhancement
Konstantin Kolinko wrote:
2010/6/11 Reich, Matthias matthias.re...@siemens-enterprise.com:
The concept of long poll is e.g. described in
http://www.javaworld.com/javaworld/jw-03-2008/jw-03-asynchhttp
.html?page=6
The sequence of events in my situation is as follows:
- a poll request
On 10/06/2010 9:49 PM, Konstantin Kolinko wrote:
2010/6/8 Reich, Matthias:
I modified the code (in 6.0.20 and 6.0.26) so that the
error flag is not set.
With that change Tomcat kept the connection open:
...
if (response.isClosed() || !request.isComet()) {
if (status
Hello,
I am using a CometProcessor servlet in a long-poll scenario, and recently had
a closer look at the life span of connections that are used for poll requests.
I noticed that connections are closed by Tomcat whenever a poll request
was answered (and closed) directly during processing of the
Hi,
if your simulation really requires waiting on server side,
you could also have a look at Comet
(http://tomcat.apache.org/tomcat-6.0-doc/aio.html).
A Comet solution would not block a thread per request while waiting for
the timeout condition.
By the way, when using the Http11NioProtocol on a
Hi,
I haven't thought about the idea in detail, but would it be possible to
wrap the response?
The wrapper would have to ensure that cookie replacement is applied
before any data is written to the output stream or writer.
A remaining issue would be that encoded (redirect-) URLs in the response
With your implementation, the valve will have the effect that a session
is created upon first access to a server,
not only when required by the application.
(see also discussion on
http://www.nabble.com/Cookie-less-session-tracking---whats-are-the-downs
ides-tp16738472p16738472.html )
Thus, the
If the webapps shall be completely isolated and shall not share connectors it
could be an option to define three separate services in server.xml.
Then the transport guarantee for webapp2 is given by the server configuration.
You should be aware that you must assign separate thread pools to each
I think it is better to start one background worker thread and pass the log
requests to that thread with the help of a queue.
You can also consider to let the worker cache the DNS lookup results.
(Usually you will see requests from the same clients lots of times.)
- Matthias
-Original
Hi,
I am doing it this way:
Connector c = new Connector(protocol);
c.setPort(port);
if (secure)
{
c.setScheme(https);
c.setSecure(true);
}
// now set further attributes as required
- Matthias
-Original Message-
From: brien colwell [mailto:[EMAIL PROTECTED]
You should ask the implementors of ParameterMethodResolvingServlet
(according to Google this seems to a project within dfki), or look at
it's implementation.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 23, 2008 12:24 PM
To:
I think you need to explain a little more on what you want to achieve by
using comet with JSPs.
The JSP processing model is bound to the traditional Servlet processing
model,
and a compiled JSP is a traditional Servlet - not a Comet Servlet.
I am not sure if including response snippets generated
Hi Oliver,
I would guess that a library is missing in your classpath.
I am also using Tomcat in embedded mode, and I had seen the same kind of
error because I missed to add el-api.jar to the classpath.
These are the tomcat libraries I have included and which are sufficient
(without any further
I think the problem arises because
a.public static final boolean IS_SECURITY_ENABLED =
(System.getSecurityManager() != null);
is more a macro definition than a constant definition.
But as Java does not support macros, the compiler cannot replace
occurrences of 'IS_SECURITY_ENABLED'
Hi,
another approach is the use of a RepositorySelector.
- you rely on the container to provide the log4j classes and to install
a suitable RepositorySelector
(should happen as early as possible, e.g. in a ServerLifeCycleListener)
- each webapp can still provide it's own logging configuration
-
Hi,
is there a way to configure the APR connector in a way
that it requests a client certificate only if the client accesses
a resource that is protected by a security constraint?
This works with a Java connector if I specify the option
clientAuth=false.
The client certificate is not requested
Perhaps you should add this to the example:
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
resp.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
you must be using the APR or NIO connector to get
Hi,
I had to solve a similar problem a while ago.
The solution I found was a small Servlet that I deployed in the other
webapps.
This Servlet used a RequestDispatcher to dispatch the login/... requests
to the
login servlet of the main webapp.
However, as far as I remember, the redirect back to
Hi,
When sending requests to Tomcat during the startup phase, I got a NPE in
the AprEndpoint run method, line 1495:
getPoller().add(socket);
This can happen because in the start method, the pollers are initialized
after the acceptor threads already have been started so that the
getPoller()
Hi,
it looks as if class
javax/xml/rpc/Service
was as well found in common/lib as in the WEB-INF/lib folder of your
webapp.
If the webapp classloader looks for this class, it will first look in
webapps private resources.
However, the class had been loaded and resolved before via the common
Hi,
my feeling is that the CoyoteAdapter does a check that should not be
done in this place (just because the implicit assumption is wrong that
nothing will happen concurrently during the few nano seconds between the
Servlet's available() check and the check of the adapter.)
It looks as if the
There have been a lot of things fixed and enhanced in the Comet area
since version 6.0.10.
You should better try with version 6.0.13.
Regards,
Matthias
-Original Message-
From: Ritesh Kumar [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 21, 2007 11:43 AM
To: users@tomcat.apache.org
,
Matthias
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 13, 2007 8:09 PM
To: Tomcat Users List
Subject: Re: Comet: Unsufficiently synchronized recycling decisions
Reich, Matthias wrote:
Hello,
I did not get any response on my
to receive any reaction?
Regards,
Matthias
-Original Message-
From: Reich, Matthias
Sent: Wednesday, May 30, 2007 2:04 PM
To: 'Tomcat Users List'
Subject: Comet: Unsufficiently synchronized recycling decisions
Hi,
as mentioned in my contribution to topic 'Web application
with topic 'Comet: Unsufficiently
synchronized recycling decisions'.
Regards,
Matthias
-Original Message-
From: Reich, Matthias
Sent: Tuesday, May 29, 2007 10:54 AM
To: 'Tomcat Users List'
Subject: RE: Web application receives request parameters sent
to another application on Tomcat 6
Hi,
as mentioned in my contribution to topic 'Web application receives
request parameters sent to another application on Tomcat 6', I sometimes
get non-recycled Request objects in a BEGIN event.
A non-recycled request object appeared in a BEGIN event if the previous
request processed by the
Hi,
I am experiencing a behavior that may be related to the mentioned
problem.
My Servlet uses the Comet interfaces of Tomcat 6.
For debugging purposes, when my Servlet receives a BEGIN event, it
stores a request counter in an atttribute of the HttpServletRequest
object.
(This is done to see in
Hi,
I think you have to add
cometEvent.getHttpServletResponse().getWriter().flush();
also in the READ event case.
Matthias
-Original Message-
From: Peter Warren [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 22, 2007 10:11 PM
To: users@tomcat.apache.org
Subject: comet read event
ResourceBundle.getBundle uses the ClassLoader that was used to load the
class that's calling this method when it looks up the resource.
Have you checked that the class which contains the call to
ResourceBundle.getBundle
is loaded by the expected WebappClassLoaders?
Matthias
-Original
Hi,
the spec says that a 304 response MUST include header
- ETag and/or Content-Location, if the header would have been sent
in a 200 response to the same request
Does Tomcat send an ETag header in a 200 response when it serves static
content?
If not (and I assume that it doesn't), I
The annoying thing about it is, that you cannot use a pattern that says
ignore /protected/include.
Thus, you must specify patterns for all subdirectories that shall be
protected separately.
Matthias
-Original Message-
From: Hassan Schroeder [mailto:[EMAIL PROTECTED]
Sent: Friday,
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 08, 2007 11:00 AM
However, the Javadoc of enum EventSubType says:
TIMEOUT - the connection timed out (sub type of ERROR);
note that this
ERROR type is not fatal, and the
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Wouldn't every application which isn't as dumb as the chat example
(which does not care about the content it reads but simply passes it
back to it's clients) need to implement it's own mechanism to check
-Original Message-
From: Rémy Maucherat [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 02, 2007 11:13 PM
On 5/2/07, Sebastiaan van Erk [EMAIL PROTECTED] wrote:
It's a race condition and the problem occurs quite infrequently
(especially with small request bodies). The larger the
-Original Message-
From: Sebastiaan van Erk [mailto:[EMAIL PROTECTED]
Sent: Friday, April 27, 2007 7:24 PM
To: Tomcat Users List
Subject: Re: Comet: problem with request.getParameter() in
Comet POST requests
GET parameters, ie parameters in the URL will work.
However,
Wouldn't every application which isn't as dumb as the chat example
(which does not care about the content it reads but simply passes it
back to it's clients) need to implement it's own mechanism to check
whether there is enough input available to start parsing a chunk of
data?
Hi,
you did not tell us about how you load the war file.
If the extension is correct (mynewwar.ZIP) I think it won't be loaded
automatically.
If it is named mynewwar.war and e.g. available in directory C:\mywebapps this
should work:
Context ctxt = embedded.createContext(/mynewwar ,
Hello again,
I would like to give you another chance to see the situation where the
processing objects are not recycled.
After all my observations, I had the feeling that the reason for the
non-recycled processing objects must be problems with concurrent access
to queues or maps that hold these
Excuse me that I left you alone during the discussion yesterday!
Let me clarify: The scenario is that the client polls for events.
Thus, it sends a subsequent poll request once it got an answer from the server.
(And how should I bring Tomcat to create hundreds of request objects with four
Well, anyway the lifecycle should be well-defined, and I doubt that it
currently is well-defined.
If I try to find a better name for class CometEvent which reflects the
lifecycle of it's instances
according to the current implementation, the name CometRequest fits much better
than the name
Subject: Re: Memory Leak with Comet
On 4/26/07, Reich, Matthias [EMAIL PROTECTED] wrote:
The clear semantics of this approach would be: Processing
is the same as for synchronous requests , except that the
RequestProcessor thread is released from processing early,
and another thread
Hi,
I am working on a similar scenario and currently elaborate on the Comet
interfaces.
1. With the BEGIN event you get a fully parsed request object, i.e. you
don't need to wait for READ events to start processing the request.
2. You can keep a reference to the request and response object so
I tried with Tomcat6 compiled from trunk revision 532271 and two
browsers sending the requests.
Unfortunately it is not that easy for me to put the dump on a public web
server.
Instead, I had a look at the dump myself.
First I ran Tomcat with a single connector with attribute maxThreads=20,
and
Maucherat [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 25, 2007 3:11 PM
To: Tomcat Users List
Subject: Re: Memory Leak with Comet
On 4/25/07, Reich, Matthias [EMAIL PROTECTED] wrote:
First I ran Tomcat with a single connector with attribute maxThreads=20,
and started it with -Xmx10m
Hello,
I am sorry that I did not address the memory leak issue to the users
list first, before sending this bug report:
http://issues.apache.org/bugzilla/show_bug.cgi?id=42217
I am aware of the fact that memory allocation occurs in Java progams,
and that Tomcat will exploit some resource pools
: Re: Memory Leak with Comet
On 4/24/07, Reich, Matthias [EMAIL PROTECTED] wrote:
If memory allocation of Tomcat continues until I see messages like
org.apache.coyote.http11.Http11NioProcessor: Error processing request
java.lang.OutOfMemoryError: Java heap space
There are leaks that have been
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