DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-11-17 Thread bugzilla
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[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|REOPENED|RESOLVED
 Resolution||WONTFIX




--- Additional Comments From [EMAIL PROTECTED]  2004-11-17 16:03 ---
So it seems to work on 5.5 (I tried 5.5.4, couldn't reproduce the error, and 
Marc couldn't reproduce it on 5.5.3).  Given that no one feels like doing 
classloader work on the 5.0 branch now that 5.5 is stable, I'm closing this 
issue.  Please only reopen this issue if you have a tested patch to the 
classloader that you can attach to it -- thanks.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-27 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-27 11:23 ---
I could only test it on one computer up to now, but it seems better with 5.5.3:
I wasn't able to reproduce the problem in 20 tests when it appeared ~8 times for
20 tests with 5.0.28. I have to perform tests on other machines to have a better
opinion.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-27 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-27 12:08 ---
Then it would indicate that the issue was with StandardClassLoader (which in 5.5
is replaced by a URL classloader).

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-25 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-25 19:11 ---
Updates?  Is 5.5.3 better?

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 11:01 ---
I tried it, and it worked (I'm on Windows). I tried increasing the amount of
frames too.
I don't quite see how it would be different from hitting one of the pages with
ab and a high concurrecy.

This bug doesn't make sense to me overall: it's getting closer to INVALID.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 12:56 ---
As it is a bug that doesn't happen systematically, I understand that it is for
you difficult to accept it as valid. But as I'm not the only one having the
problem, I'm sure that it is not a dream (sorry a nighmare) and it sould NOT be
changed to INVALID.

As you can't reproduce it on your computer, perhaps can you give some indication
to those wo can, so that they to find the cause? What would you look at if you
could reproduce it?

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup

[EMAIL PROTECTED] changed:

   What|Removed |Added

Version|5.0.19  |5.0.28



--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 13:01 ---
I'd look at the thread-safety of the relevant classloader.  Multiple frames 
means multiple more-or-less concurrent hits, and if there's a class that needs 
to be loaded it means multiple concurrent loadClass-type requests.  But you 
don't want to just synchronized everything on the classloader for no reason, as 
that's a performance penalty.  However, that can be a useful diagnostic tool:

So here's one approach, if you have the time and really want to help us out: 
build your own Tomcat 5.0.28 having added the synchronized keyword around every 
method in every Catalina classloader.  Then try your test and see if the error 
goes away.  This is just a guess, but that's what I'd try if I were in your 
position.  It's wild overkill, but you can always strip out the synchronized 
places one by one afterwards.

BTW, updating version from 5.0.19 to 5.0.28 on this issue.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 13:12 ---
If this was the case, then you would get problems for servlet based application
as well, or for JSPs which use helper classes. Actually, since a frame is only a
way to do a few concurrent requests, you'd get problems during load tests (for
ex on the date.jsp example).

Syncing everything in the classloader is a bad test IMO. I think it will greatly
affect the capability of the server to run concurrent stuff, and as a result it
will change the behavior of many other components.

Let's not waste time on this.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 14:08 ---
For info: 
I've just performed a test on an older computer with Windows 2000. Downloaded
Tomcat 5.0.28 zip version and placed the small test application attached to this
bug in the webapps dir. I've performed 20 times startup.bat, called the default
page of the webapp in the browser and then shutdown.bat. In 12 cases everything
was correct and in 8 cases one of the frame had the NoClassDefFoundError exception.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 14:21 ---
I am sure this is a bug.  There is just too much documentation and too many
disparate reports for that not to be the case.  I am also not sure what
INVALID means, but if it means that the bug does not exist, that is not right.
 The bug does exist.  So, I assume INVALID does not mean that.

I clearly get the undesired behavior both with Marc's test war and with my own
application.  

I should mention that I have different frame based pages.  Some of the pages
have this problem on a consistent basis.  Others never have this problem.  Why
that would be is a mystery to me.  The only apparent difference between the
pages is the number of times the custom taglib is used.  On the page with twelve
uses of the taglib, the behavior is clear and persistent: nearly everytime but
not quite.  Why that should make a difference is not clear to me.  But, that is
the only difference I see.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 14:33 ---
Created an attachment (id=12984)
I tested Marc's war 7 times and got the error everytime on a Compaq Presario 2500 
running XP Home and Tomcat 5.0 as previously indicated.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 14:54 ---
Yoav, you mean in all 3:
org.apache.catalina.loader.StandardClassLoader
org.apache.catalina.loader.WebappClassLoader
org.apache.jasper.servlet.JasperLoader

or are there any other class loaders?

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-07 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 14:58 ---
Try Tomcat 5.5.3 first. Then I think you shouldn't get guidance if you expect to
actually get a fresh look at what this issue could be.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-06 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-07 05:06 ---
Created an attachment (id=12980)
This is a war provided by Marc Guillemot which replicates this bug.  The replication 
works better (or worse) on Windows than Linux.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-10-05 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-10-06 05:59 ---
Hi.

It is definitely still happening on 5.0.28.

Additional comments/indicators:

-  Only happens when frames are in use - and more than 1 page separate frames 
are accessing the custom tag libs
-  Seems to happen when the machine running Tomcat is under fairly heavy 
memory load
-  Seems more likely to occur if the custom tag lib defines a large number of 
tags.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-09-21 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-09-21 19:20 ---
Without a test case allowing us to reproduce this problem, this issue will be 
closed as either INVALID or WORKSFORME.  Please post a WAR file which we can 
reload using the admin webapp that will throw this exception.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-09-08 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-09-08 13:22 ---
Yes, it still happens with Tomcat 5.0.28.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-08-04 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup

[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|RESOLVED|REOPENED
 Resolution|INVALID |



--- Additional Comments From [EMAIL PROTECTED]  2004-08-04 16:12 ---
This seems to happen after each restart of the applicaton on one development
computer. It appears only sporadically on other computers. I can't send the
application. If you have indications, I can apply them on this computer to help
solving this bug.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-07-19 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup

[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|REOPENED|RESOLVED
 Resolution||INVALID



--- Additional Comments From [EMAIL PROTECTED]  2004-07-19 12:29 ---
Sorry, it still doens't happen for me. The admin webapp appears to work fine,
with all its Struts tags and frames.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-06-15 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup

[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|RESOLVED|REOPENED
 Resolution|INVALID |



--- Additional Comments From [EMAIL PROTECTED]  2004-06-15 16:33 ---
I'm having the same issue. A refresh of the offending page loads properly. 
It's always after a tomcat restart and it can't find one of the classes for a 
custom tag.

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-05-29 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-05-29 18:56 ---
I've got the same problem: 
 webapp reloading/starting  page with frames  NoClassDefFoundError: xxxTag 
(after reloading of page everything is OK)

this happens sporadically (but happens :( )

i know that NoClassDefFoundError: class is usually connected with the 
problem of the visibility of dependent classes of class in classloader tree, 
but in this case it seems to be st. else (i've checked that all required 
clasess was visible).

i don't understand the accidentality of occurrences of this error (various 
frames, various tags)

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-05-29 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup





--- Additional Comments From [EMAIL PROTECTED]  2004-05-29 19:10 ---
Hi.

This also happens to me.  In my case is always seems to happen with TEI 
classes that are in my custom tag library - and if there are not any TEI 
classes then another class - also a custom tag class - is not found after 
restart.  A refresh sorts the problem.

I have posted this issue to the users list a number of times.  The problem 
seems to happen under the following conditions:

-  large custom tag library (mine is custom with 200+ tags)
-  A number of frames in the browser - one or more of which reference the tag 
library
-  TEI classes (if present) are always the culprits - and always in order of 
appearance in the tld.

I have now got a servlet doing a load-on-startup of 1 and in its init I do the 
following:

ClassLoader cls = this.getClass().getClassLoader();
cls.loadClass(offence.very.TEIClasses);

:)

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DO NOT REPLY [Bug 28949] - Occasional NoClassDefFoundError for tag classes at startup

2004-05-14 Thread bugzilla
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Occasional NoClassDefFoundError for tag classes at startup

[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||INVALID



--- Additional Comments From [EMAIL PROTECTED]  2004-05-14 07:20 ---
I've never seen this occur with the admin webapp, which seems a good candidate,
nor with other Struts based webapps.
Please submit a test case.

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