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Posted to users@tomee.apache.org by White-Gandalf <Ha...@t-online.de> on 2008/02/01 07:34:39 UTC
Installation: ClassNotFoundException:
org.apache.openejb.loader.OpenEJBListener
Hi folks,
i'm new on Tomcat and OpenEJB. I had installed Tomcat 6.0.14 with some
problems, but nevertheless functioning at last. Now, i wanted to add
OpenEJB. After starting the installation procedure by copying the "war" to
webapps, when i tried to restart the server, it wasn't starting anymore. In
"stderr_...log" are "ClassNotFoundException:
org.apache.openejb.loader.OpenEJBListener" to be found.
Has anybody an idea, what's going wrong?
So far i had only followed the really simple copy operation, and i have one
speciality that possibly has something to do with that behavior.
After the installation of the "war" by tomcat, the batch file for starting
the server as a user application from the command line was changed. That
contradicts the fact, that tomcat has to be running as a service on my
system. To react on that, i executed the two lines in question by hand,
namely:
I executed by copying by hand:
copy /Y "%CATALINA_BASE%\webapps\openejb\tomcat\annotations-api.jar"
"%CATALINA_HOME%\lib\annotations-api.jar"
I executed by adding the environment variable to the tomcat user profile:
set
JAVA_OPTS="-javaagent:%CATALINA_BASE%\webapps\openejb\lib\openejb-javaagent-3.0-beta-1.jar"
%JAVA_OPTS%
(In both cases the environment variables expanded...)
Is that in any matter incompatible with the way of deployment for servers in
user-application-mode?
Or will there be some other thing wrong with that EJB?
Is there any way to keep the server running, when only a subordered module
doesn't start correctly? Or do i have to keep the OpenEJB-Package deleted
until this matter is solved?
--
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Re: Installation: ClassNotFoundException: org.apache.openejb.loader.OpenEJBListener
Posted by David Blevins <da...@visi.com>.
On Jan 31, 2008, at 10:34 PM, White-Gandalf wrote:
>
> Hi folks,
>
> i'm new on Tomcat and OpenEJB. I had installed Tomcat 6.0.14 with some
> problems, but nevertheless functioning at last. Now, i wanted to add
> OpenEJB. After starting the installation procedure by copying the
> "war" to
> webapps, when i tried to restart the server, it wasn't starting
> anymore. In
> "stderr_...log" are "ClassNotFoundException:
> org.apache.openejb.loader.OpenEJBListener" to be found.
>
> Has anybody an idea, what's going wrong?
>
> So far i had only followed the really simple copy operation, and i
> have one
> speciality that possibly has something to do with that behavior.
>
> After the installation of the "war" by tomcat, the batch file for
> starting
> the server as a user application from the command line was changed.
> That
> contradicts the fact, that tomcat has to be running as a service on my
> system. To react on that, i executed the two lines in question by
> hand,
> namely:
Right, I'm not sure that the bat files are used at all when installing
tomcat as a windows service, so editing them in any way may have no
affect.
The 6.0 docs have this page, which is basically a copy of the second
link:
http://tomcat.apache.org/tomcat-6.0-doc/windows-service-howto.html
http://commons.apache.org/daemon/procrun.html
Regarding the -javaagent param, it might be possible to set that up
using the --JvmOptions flag as mentioned in those docs. Seems the
most likely of the unlikely looking options. But I suspect it can
only handle -X and -D vm options and the new -javaagent option might
be unsupported. The javaagent isn't strictly required, more strongly
encouraged if you use JPA (aka EJB3 EntityBeans).
Regarding the annotations jar and the ClassNotFoundException, I
suspect they might be the same problem. I've seen it before with
Tomcat as a windows service seemingly refusing to actually stop when
you click their little stop/start or restart buttons and changes
you've made to the classpath never take effect.
One thing to try is pop open the services panel in windows, find the
tomcat service right click on it and select the stop option, then go
ahead and start it again. Or restart your machine for good measure.
If running tomcat as a service is not that important to you,
definitely just grab a plain zip, unpack and boot from the bat files
as it will be far less difficult to deal with and the ejb plugin will
work -- all these issues are service related.
Tomcat can handle plain webapps not starting and continue to work, but
it can't handle anything such as a tomcat specific listener not
working. Uninstalling the openejb webapp is as simple as deleting the
webapp, removing OpenEJBListener declaration from your server.xml if
you added it either manually or via the openejb webapp install page,
then restarting tomcat. The trick is if I am right in that Tomcat is
in fact not restarting and is keeping the same old vm with the same
classloaders, it won't work either.
Let us know if the more direct attempts at restarting work or not. I
suspect anyone who attempts to use Tomcat as a windows service may
have difficulties with the integration and it'd be really good to get
some up to date info on this and document accordingly.
As an FYI, a build of the beta 2 release is currently up for vote and
does have improvements in the Tomcat integration -- specifically
around the need for the OpenEjbListener, annotations-api.jar and the
need for a restart (none are required anymore). If you can get a
clean Tomcat install again, it might be worth it to try them out.
Binaries are here: http://people.apache.org/~dblevins/stage2/3.0-beta-2/
Let us know how things go and we can try and find another solution.
If all else fails I can get my hands on a windows machine next week
and hammer on it some.
-David
Re: Installation: ClassNotFoundException: org.apache.openejb.loader.OpenEJBListener
Posted by David Blevins <da...@visi.com>.
On Jan 31, 2008, at 10:34 PM, White-Gandalf wrote:
>
> Hi folks,
>
> i'm new on Tomcat and OpenEJB. I had installed Tomcat 6.0.14 with some
> problems, but nevertheless functioning at last. Now, i wanted to add
> OpenEJB. After starting the installation procedure by copying the
> "war" to
> webapps, when i tried to restart the server, it wasn't starting
> anymore. In
> "stderr_...log" are "ClassNotFoundException:
> org.apache.openejb.loader.OpenEJBListener" to be found.
>
> Has anybody an idea, what's going wrong?
>
> So far i had only followed the really simple copy operation, and i
> have one
> speciality that possibly has something to do with that behavior.
>
> After the installation of the "war" by tomcat, the batch file for
> starting
> the server as a user application from the command line was changed.
> That
> contradicts the fact, that tomcat has to be running as a service on my
> system. To react on that, i executed the two lines in question by
> hand,
> namely:
Right, I'm not sure that the bat files are used at all when installing
tomcat as a windows service, so editing them in any way may have no
affect.
The 6.0 docs have this page, which is basically a copy of the second
link:
http://tomcat.apache.org/tomcat-6.0-doc/windows-service-howto.html
http://commons.apache.org/daemon/procrun.html
Regarding the -javaagent param, it might be possible to set that up
using the --JvmOptions flag as mentioned in those docs. Seems the
most likely of the unlikely looking options. But I suspect it can
only handle -X and -D vm options and the new -javaagent option might
be unsupported. The javaagent isn't strictly required, more strongly
encouraged if you use JPA (aka EJB3 EntityBeans).
Regarding the annotations jar and the ClassNotFoundException, I
suspect they might be the same problem. I've seen it before with
Tomcat as a windows service seemingly refusing to actually stop when
you click their little stop/start or restart buttons and changes
you've made to the classpath never take effect.
One thing to try is pop open the services panel in windows, find the
tomcat service right click on it and select the stop option, then go
ahead and start it again. Or restart your machine for good measure.
If running tomcat as a service is not that important to you,
definitely just grab a plain zip, unpack and boot from the bat files
as it will be far less difficult to deal with and the ejb plugin will
work -- all these issues are service related.
Tomcat can handle plain webapps not starting and continue to work, but
it can't handle anything such as a tomcat specific listener not
working. Uninstalling the openejb webapp is as simple as deleting the
webapp, removing OpenEJBListener declaration from your server.xml if
you added it either manually or via the openejb webapp install page,
then restarting tomcat. The trick is if I am right in that Tomcat is
in fact not restarting and is keeping the same old vm with the same
classloaders, it won't work either.
Let us know if the more direct attempts at restarting work or not. I
suspect anyone who attempts to use Tomcat as a windows service may
have difficulties with the integration and it'd be really good to get
some up to date info on this and document accordingly.
As an FYI, a build of the beta 2 release is currently up for vote and
does have improvements in the Tomcat integration -- specifically
around the need for the OpenEjbListener, annotations-api.jar and the
need for a restart (none are required anymore). If you can get a
clean Tomcat install again, it might be worth it to try them out.
Binaries are here: http://people.apache.org/~dblevins/stage2/3.0-beta-2/
Let us know how things go and we can try and find another solution.
If all else fails I can get my hands on a windows machine next week
and hammer on it some.
-David