Re: Test Mail, Please Ignore
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Leon, I think the backlog from the outage is still bring processed. At any rate, your message did in fact make it out. - -chris On 5/9/14, 12:14 PM, Leon Rosenberg wrote: I am wondering that I don't see any mails for a whole day on the list, this is pretty unusual, so I try with a TestMail Leon -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJTdCakAAoJEBzwKT+lPKRYgrQP/R2l+E0oYiSagMsZOvn3S2fz eGX5PkNd0TfoKklEtNt1evLdvwpJWVx5o6dvRVGmxIgnTqa8XXEbfOyfMJ5xTgOO b3pegaQmT82hv/kTu/agrHvbv5ALuvkJyKH/iXS8N2A0KrvaktSXia7jAJYyz0X6 2MWF0+vtyCwnpj6TTby8B9iJhz7VA4pR5g7e4sDNoqBFjro4K5ME7AGY3ReOSNvv 6H0Bcqi4huFfIpzcvXSMtr5AKqB+Cww32IKDz9J5ZxzdgT7nOGVKfBJNFdiXPISS SEHBUfh4c3ObPvcTsFjcZiSPzcMYCamPKeKcy+3zJpk8jWM4UXH4eQaHyrcBnJNN IsiykvKwlQnJPqIkVvce2ChiJ4GoJBiDzK/ebUHb87JSL4iS3u4FuZ2IkTFpHVgQ u1p8KIbbU8JPnQKL9fuUMxLDU4d6y4lDCVOefZ29CcdUYxvUtNV5mbbYF6yrc0Hi Rl4vZVw2R8Z03Ef69Vq5MYh5OpNcXr8N77p1sFV5Rrd9Gz4jPx/WBJ2befsgsG7e 0zPwWoy980noboGqEUbimrsH53IYst5NIaaZsH8/RemGjALPX4oMcKkE+J3sI8gu vi4/mYTfQrR3jmdH9nmFq2bknkIRDbwV8LxZr5GHBNw+AYC4/7ayOIrD0WNi6GM9 LbQlttJS9OSyZ1sw7rtu =NWnX -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Application monitoring
I am working on a small Tomcat servlet to monitor other tomcat-based applications running on the same physical machine, and am trying to figure out the best way to communicate between the monitoring app, and the monitored apps. My setup has several tomcat instances of a single application, each running from its own directory, and listening on its own TCP port. So there is no direct communication between the instances. I'm trying to monitor various data about the application, not about tomcat itself or the JVM. So I want to collect such things as the number of requests it has processed, the last data received, etc, and not things like memory and cpu usage. It is my app, so I can (and expect to need to) add methods or servlets to return the information I want to collect. My question is, what is the best way to make the request to get the data? Would URL request from the monitoring app to the monitored app be appropriate, and then parse the response out for display in a browser? If so, what java class is likely to be useful for this communication? I will have all the information needed to connect to the application instance (server, port, etc), but want it to be portable across OS types. Thanks! - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 8.0.3.0 getting never before seen by google Illegal State Exception. Sevlets outputting the audio output from the previous runs of the program instead of the current run.
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Leigh,
On 5/1/14, 9:22 AM, L. HAYWARD wrote:
https://github.com/Leighbee13/RUNTHIS/tree/master
For your first web application, you just *had* to use jQuery, eh?
Okay, I've got no jQuery experience, but it looks like when you click
the Add Song button, the add_more handler runs:
$('#add_more').click(function() {
var current_count;
if ($('.addsort').length !== 0) {
current_count =
parseInt($('#inputs').children(':last-child').children().first().attr('name'));
}else{
current_count=1;
}
var next_count = current_count + 1;
$('#sortable').append('li id= song' + next_count + '
name='+next_count+
' class=ui-state-defaultspan class=ui-icon
ui-icon-arrowthick-2-n-s/span img class=deletesong
src=images/delete.png alt=del width=20 height=20 style=float:
right;/li');
$('#inputs').append('pinput type=file id=file_' +
next_count + ' class = addsort name =' + next_count + '
accept=.wav, .au* required//p');
});
This is the markup from your JSP:
div id=inputs
pbutton type='button' id=add_more
style=float: right;Add Song/button!--a id=add_more
href=#Add song/a--/p
h3Songs:/h3
p input type=file class= addsort
id=file_1 name =1 accept=.wav, .au* required//p
/div
If I read the jQuery code correctly, it's going to choose the first
child of the last child of the DIV and use that element's name as
the current_count, then add one to it to get the next_count.
I believe the first child of the last child of the DIV is actually the
button, which would make the current_count nil, as it has no name
attribute. If I've got this wrong, please correct me.
You might want to eliminate the jQuery from the equation and just
hard-code the form to have some specific number of file inputs and
just leave some of them blank for testing. You can always check for
null-ness on the server side (and you should, since the user could
always leave one of the dynamically-added ones blank).
Okay, comments on the actual Java code:
1. Do not have doGet call doPost. It's not going to work. Just remove
goGet entirely, and the parent class will return a Method Not
Supported error to the client.
2. What does the stdout log usually look like for a good run? How
about a bad one?
3. If the part.write() call fails, you are screwed. You shouldn't just
(log and) ignore the exception. Instead, you should blow up and tell
the user that something bad happened.
4. What's the program select thing? Does that interact with the
other audio clips uploaded? Why are you using a java.util.Scanner?
5. When you call requestDispatcher.forward(), you need to return from
the doPost method ASAP. The way your servlet is written, the rest of
the servlet will continue on running (trying to overlay the songs,
etc.) and chaos will ensue. You can simply put a return; after the
call to requestDispatcher.forward(). I'm specifically looking at the
forward() call at line 109.
6. I'd recommend that you use an array of java.io.File objects as the
parameter to your overlay() method, but that's more of a matter of
taste than anything that will affect your program. You could also use
a set of InputStreams and writing the individual audio files to the
disk manually. I'm not sure that would improve anything other than a
bit of a performance gain. It would simplify your code, which is
always a nice thing to do. Feel free to ignore this entire comment, as
it shouldn't change anything about the correctness of your code.
7. You are allocating enormous byte buffers to read-in the audio clips
in their entirety. Is that strictly necessary? Also, you are
truncating long values to int values. For your testing, I assume that
you are never exceeding Integer.MAX_VALUE, but you could be surprised
by something like that. I realize this is toy code but if every
dissertation would include decent code, the world would be a better place.
8. You are doing a lot of manipulations across many buffers that could
probably be combined into fewer operations: reading bytes, packing
bytes, summing integers, unpacking bytes, then re-encoding as an audio
clip.
9. Your overlay() method should probably take the name of the target
file as a parameter. That way, the caller will know where the file is
going. Then, provide the same file name to the finish() method. That
way, the target file name is only specified in a single place, and you
can change it whenever you want (like if you want to make this thing
work with multiple users, it needs no further modification if the
doPost method chooses its own unique target file name for each request).
10. In your finish() method, you should buffer the reads and writes to
improve performance. Feel free to use a BufferedInputStream to read
the file, or you could just use your own byte[] buffer. Processing
files one byte
destroySubcontext failing with NameNotFoudException
Hi all,
I trying to understand under what conditions destroySubContext fails in
tomcat..? I'm trying to destroy Context which I had created, because of which
I'm unable to createContext the next time I start the service. My code is
below :
private Context srvCtx;
public void init(ServletConfig servletconfig) throws ServletException {
Context initCtx = new InitialContext();
srvCtx = initCtx.createSubcontext(myapp);
}
public void destroy() {
try
{
if (srvCtx != null)
{
srvCtx.destroySubcontext(GS_CTX_NAME);
srvCtx.close();
}
}
catch(NamingException e)
{
log_.error(new
LogQueueMessageStructure(Couldn't unbind the context,3016),e);
}
}
What is wrong with my code and also how can I debug this issue..? Please help
me out..!!
Regards,
Ravikiran N
Session fixation Tomcat 7
Hi, I am trying to resolve session fixation issue with tomcat 7.0.52 We have a Spring MVC application running on it, and the Auth method is provided by another application which writes cookie, and we use the cookie value to check whether the user is valid or not. My application URL patterns are / - Home page /login - Redirect to another application to ask user to authenticate /myaccess/user*** -- All authenticated URL's Context path= docBase=myapplication sessionCookieName=mycookiename sessionCookieDomain=application.mydomain.com sessionCookiePath=/ As I cannot use org.apache.catalina.authenticator.FormAuthenticator here. How can i prevent the session fixation ? Thanks.
Re: Tomcat and Chunked Transfer-Encoding
Hi, We still have this issue open. The problem is happening from time to time. I have some wireshark logging. can this help you to further investigate? Walter From: Konstantin Kolinko knst.koli...@gmail.com To: Tomcat Users List users@tomcat.apache.org, Date: 03/02/2014 19:58 Subject:Re: Tomcat and Chunked Transfer-Encoding 2014-02-03 Mark Thomas ma...@apache.org: On 03/02/2014 12:46, walter.heesterm...@toyota-europe.com wrote: I can't reproduce it with simple web application, it happens in one of our applications, SDL WorldServer application which we bought for translations. Even there the issue is random. 1. When response mixups happen, the first thing I would recommend is to set the following system property (you can add it to catalina.properties file): apache.catalina.connector.RECYCLE_FACADES=true Documentation: http://tomcat.apache.org/tomcat-6.0-doc/config/systemprops.html#Security That will make your configuration more secure (at price of some performance) and will raise the chances that meddling with requests/response objects outside of their lifecycle would not go unnoticed. Then look for any odd messages in the log files. E.g. attempts to write to a closed stream, or an IllegalStateException, etc A known culprit is javax.imageio.ImageIO API http://wiki.apache.org/tomcat/FAQ/KnownIssues#ImageIOIssues So far it looks like an application issue, as Mark mentioned. 2. The convention on this mailing list is to do not top-post. http://tomcat.apache.org/lists.html#tomcat-users - 6. 3. What connector implementation are you using? HTTP/AJP? BIO/NIO/APR? I guess that you use HTTP and are behind an HTTP proxy. 4. Do you use any Asynchronous IO, Comet, WebSockets (e.g. via Atmosphere framework)? 5. In your traffic snippet, does that HTML response match the request, or a previous request? What generates those scrollTo script fragments? 6. Note that you can configure AccessLogValve to log your thread name (%I), http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html Best regards, Konstantin Kolinko - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org This e-mail may contain confidential information. If you are not an addressee or otherwise authorised to receive this message, you should not use, copy, disclose or take any action based on this e-mail. If you have received this e-mail in error, please inform the sender promptly and delete this message and any attachments immediately.
