The code below fails on the line: Class.forName("oracle.jdbc.driver.OracleDriver");
with the error:
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
The two printlns print: Wed_Jun_22_11:18:51_PDT_2005 false This makes me think the class exists and can be found. Also this exact same class works in an a non-servlet application.
I have rebooted everything multiple times and regenerated the application/servlet multiple times. All values have been hard coded to make it simple and short.
I'm using: Eclipse JavaEE 1.4.2 Tomcat 7 jdk1.7 Oracle 11g R2 Windows 7 64bit
I have already added the jar files in web-inf. but it is still giving the following error: java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver.
Any suggestions would be great.
It is a bit hard to tell what exactly going wrong without looking into your application and tomcat server. But there are a couple of hints for your issue.
NoClassDefFoundError always makes me think that there is class collision rather than missing jar file. Be ware of the difference between ClassNotFound and NoClassDefFoundError
tomcat loads class in a different way as what normal java app does. Normally, the class loaders in a stand along java app will follow delegate pattern, which means the child class loader will always delegate the class loading job to its parent class loader. But tomcat does not exactly follow this. So it will load(find source file, read byte code and create a instace of class Class) by itself.
So check your tomcat lib as well as all the web apps under the tomcat and see if there are multiple version of ojdbcXXX.jar
Go through C:\apache-tomcat-7.0.47\lib path(this path may be differ ->based on where you pasted the Tomcat server ) then past ojdbc14.jar if its not contain.
Then restart the server in eclipse then run your app on server
Related
I have created and deployed one war for my application.
I wanted to use derby for integration testing so I created one module in Jboss.
At run time I am getting ClassCastException for same class, since the class is getting loaded twice: first from war, then from my module's jar.
To elaborate, my war, say application.war contains myderby.jar and under my module i have added myderby.jar .My class, say Custom.java, is present in myderby.jar.
If you want a jar to be accessible to multiple WARs, JARs, or an EAR and a WAR/JAR - or in fact any such combination, you can include it as a global module. Here's how it can be done.
This might also help.
As Suggested I followed the following link
https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/6/html/Administration_and_Configuration_Guide/Add_a_module_to_all_deployments.html and it worked for me.
I'm having a strange problem with one of my classes in an Eclipse Dynamic Web Project. I compile the war, save it to /webapps, startup Tomcat, see the war deployed. The only problem is that one of my classes (the one I use to query a PostgresSQL db) does not appear to be updating. I see the file update in the WEB-INF directory of the deployed war but the code that is running is not the code in the class. Namely it runs a SQL query that doesn't exist anywhere in class any longer - giving me a SQL error every time it's run.
Also, system.out.println statements in all my classes are showing up in the console except for this one class.
I'm using the Apache bundled with JUDDI (Tomcat 5.5). This one has me seriously stumped.
In a word: bounce the server. It sounds like an older version of the .class file is cached, so your new one isn't being loaded.
UPDATE: Since you've bounced the server, I'd say you should simplify the problem by taking out things that are unnecessary until you can make it work - because this does work.
Don't use Eclipse. Build, package, and deploy your WAR by hand to Tomcat outside of Eclipse. Start Tomcat in a shell using the startup script. See if it picks up your new class.
I have an app, built on GWT (google web toolkit) and JPA (eclipselink 2.3). it's not using GAE (app engine).
when I finished application, I ran 'google->gwt compile' menu in eclipse and then uploaded /war content to the tomcat directory...
application is running, but when I try to do one specific action in gui, I get an error message and Tomcat log contains this exception: http://paste2.org/p/1879857 (java.lang.NoClassDefFoundError)
during development of the application, I encountered this kind of exception several times, it was always caused by absence of library .jar file in the war/WEB-INF/lib/... anytime it has occurred, I stored .jar to the folder and it worked... but not this time...
this class is located in gwt-dev.jar (yes, it is there - have searched the archive) and it didn't help me to store archive to the lib/ folder...
it is also included in classpath, and compiler had no problem... compilation finished without errors (so compiler can see the class).
do you have any idea, how to make tomcat to see the class?
thanks
gwt-dev.jar shouldn't be in WEB-INF/lib/, it is the GWT compiler, and shouldn't be needed or used at runtime. At the same time, that HashSet (com.google.gwt.dev.util.collect.HashSet, part of dev mode) shouldn't be used outside the compiler - use java.util.HashSet instead.
Change the HashSet import in GroupImpl.java from com.google.gwt.dev.util.collect.HashSet to java.util.HashSet. You shouldn't need gwt-dev.jar to run your application.
I have a very annoying problem with Glassfish and PostgreSQL. I have an EAR which contains a WAR and several other EJBs. I am using PostgreSQL. The annoying thing is that sometimes (this sometimes is the most disturbing thing because I have no clue what could go wrong) I get a ClassNotFoundException: java.lang.ClassNotFoundException: org.postgresql.core.Parser
Sometimes (!!!), the problem is solved if I clean and build the whole EAR, sometimes I have to restart the Glassfish, too.
I sometimes get NoClassDefFoundError, too.
Could anybody tell me how to include, package or do anything with the JAR which contains the missing class?
Thank you,
Norbert
Where do you put the jar: directly inside the EAR? Or in the WAR inside the EAR? For JDBC drivers, I think the recommendation is to always put them in the container's shared area and never in an application. (When I used JBoss a couple of years ago, we always put JDBC drivers into server/lib and had trouble if they were included in EARs as well, especially if the versions got out of sync)
I need to connect to a MongoDB instance from my EJB3 application, running on glassfish 3.0.1. The Mongo project provides a set of drivers, and I'm able to use them in a standalone Java application.
How would I use them in a Java EE application? Or maybe better phrasing: how would I make a 3rd party library available to my application when it runs in an EJB container?
At the moment, I'm getting a java.lang.NoClassDefFoundError when deploying a bean that
tries to import from the library:
[#|2010-03-24T11:42:15.164+0100|SEVERE|glassfishv3.0|global|_ThreadID=28;_ThreadName=Thread-1;|Class [ com/mongodb/DBObject ] not found. Error while loading [ class mvs.core.LocationCacheService ]|#]
[#|2010-03-24T11:42:15.164+0100|WARNING|glassfishv3.0|javax.enterprise.system.tools.deployment.org.glassfish.deployment.common|_ThreadID=28;_ThreadName=Thread-1;|Error in annotation processing: java.lang.NoClassDefFoundError: com/mongodb/DBObject|#]
[#|2010-03-24T11:42:15.259+0100|SEVERE|glassfishv3.0|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=28;_ThreadName=Thread-1;|Exception while loading the app
org.glassfish.deployment.common.DeploymentException: java.lang.NoClassDefFoundError: com/mongodb/DBObject
at org.glassfish.weld.WeldDeployer.event(WeldDeployer.java:171)
at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:125)
at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:224)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:338)
I tried adding it to the NetBeans project (Properties -> Libraries -> Compile -> Add Jar, enable 'Package'), and I also tried manually copying the jar file to $GF_HOME/glassfish/domains/domain1/lib (where the mysql-connector already resides).
Do I need to 'register' the library with the container? Reference it via Annotation? Extend the classpath of the container to include the library?
Hmm... Shouldn't you put this "driver" in glassfishv3/glassfish/domains/domain1/lib/ext?
You could put shared libs to lib/ext of your domain. commons-logging and jdbc drivers are often added in this domain path.
Common Class Loader
GlassFish v2 has a well defined Class
Loader hierarchy which identifies the
common class loader as the proper way
to deal with shared libraries. So to
make a long story short, putting you
libraries and other framework JARs in
domains/domain1/lib is all you need to
do.
lib/, not lib/ext
The person asking me the question had
tried putting the libraries in
domains/domain1/lib/ext which
triggered an interesting
ClassNotFoundError for core Java EE
classes such as
javax.servlet.http.HttpServlet. Shing
Wai Chan was quick to explain that
domains/domain1/lib/ext is part of
-Djava.ext.dirs which makes any of its JARs be considered as a JDK extension
which means web app frameworks placed
there will be loaded before
webcontainer implementation classes as
they are higher up in the classloader
delegation chain.
Glassfish has own Class loader hierarchy, http://docs.oracle.com/cd/E19798-01/821-1752/beade/index.html
I face the same problem in my project and then I put all my Third party libraries in domain/domain1/lib and my problem solved. On other way round, my problem was solved too by putting libraries in glassfish/lib.
In my case I was using Oracle Express Edition 11gR2 and Glassfish 3.1.2 and the ONLY way that works in my case was putting the ojdbc6 in:
C:\Program Files\glassfish-3.1.2.2\glassfish\lib
Go to your Glassfish doamin directory.
Then go to lib folder.
Place the libraries there.
Restart the glassfish and run.
(Ex) C:\glassfish3\glassfish\domains\domain1\lib
Try to put Your libs into $GF_HOME/glassfish/modules/.
It's dirty, but will work.