For a school assignment I received a Netbeans project using JNDI and JMS with Glassfish (3 open source edition). All the Glassfish libraries this application is using are referenced by absolute path and all the other libraries (in the "lib" folder) are referenced by relative path.
Since my group is working with a version control system the "lib" folder is included in the repository. This works fine because it is a small project. However the Glassfish libraries are problematic as I am a Linux user and the others are Windows users. We have worked around this problem by letting Netbeans take care of the library paths.
The chosen solution 'works' but is not the best solution. I thought Maven would be a better solution.
However the "gf-client" library is giving problems. Whenever I use the Maven "gf-client" the application throw an exception:
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
Both libraries have "3.1.2" as version. The structures of the libraries look identical and both MANIFEST.MF files too. The size and the md5sum of both files however are not equal.
I've tried all "gf-client" libraries I could find in the default Maven repository and none worked. No other library gives me problems.
Was able to resolve it by adding this to my pom.xml:
<dependency>
<groupId>org.glassfish.main.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.1.2</version>
</dependency>
The gf-client jar is referring to classes in other jars. The first class it was missing was probably java.naming.factory.initial. But after fixing this it still needed a bunch of other classes. Quickest way for me was to add the glassfish-embedded-all dependency.
Related
I have a maven web app project, where I use JodaTime. JodaTime is not directly referenced in my maven project, but is a part of a transitive dependency. In other words, my web app war, has another project of mine as a direct dependency, and that jar contains JodaTime.
I am getting an error after executing these two lines. It compiles fine though.
DateTime firstDate = new DateTime();
firstDate = firstDate.withYear(2016);
And here is my error:
java.lang.NoSuchMethodError: org.joda.time.DateTime.withYear(I)Lorg/joda/time/DateTime;
I know that these kinds of errors can happen if I compile and run with different versions of a library, like this answer says, but the withYear() has been around since JodaTime 1.3, since 2006, and I can't see that I could ever have imported a version that old. I've even checked my final war-file, and the only JodaTime library present, is 2.9.2.
The two lines runs fine if I create a main-method snippet, and run it from within the same project in eclipse. They only fail upon compilation into a war file, and running from my weblogic 10.3.2 server.
Does anyone have any idea on how I can proceed to debug this one?
WebLogic 10.3.6 includes this on the classpath:
joda.time_1.2.1.0.jar
This is earlier than the 1.3 that has the missing method.
Your code compiles, which is a good indication that your app's classpath has at least Joda 1.3.
Thus I suspect this is a WebLogic classpath issue. When your app uses libraries that are also on the WebLogic classpath, you need to tell WebLogic which library to use. You do this with the prefer-application-packages element in src/main/webapp/WEB-INF/weblogic.xml.
<weblogic-web-app xmlns="http://xmlns.oracle.com/weblogic/weblogic-web-app"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.oracle.com/weblogic/weblogic-web-app
http://xmlns.oracle.com/weblogic/weblogic-web-app/1.3/weblogic-web-app.xsd">
<context-root>myApp</context-root>
<container-descriptor>
<prefer-application-packages>
<package-name>org.joda.time.*</package-name>
<package-name>org.slf4j.*</package-name>
<package-name>org.slf4j.impl.*</package-name>
<package-name>org.slf4j.spi.*</package-name>
<!-- others here -->
</prefer-application-packages>
</container-descriptor>
<!-- rest of weblogic.xml here -->
</weblogic-web-app>
WebLogic has a classpath analysis tool called wls-cat to help locate these conflicts, described in this blog post. One caveat - do not just copy wls-cat's prefer-application-packages block into your webapp and think you're done - you need to resolve each conflict one by one. Sometimes that means excluding dependencies from your webapp or using scope provided.
JBoss AS7 Developer Guide mentions the following classloading preference from a higher priority to lower priority:
1. System Dependencies - These are dependencies that are added to the module automatically by the container, including the Java EE api's.
2. User Dependencies - These are dependencies that are added through jboss-deployment-structure.xml or through the Dependencies: manifest entry.
3. Local Resource - Class files packaged up inside the deployment itself, e.g. class files from WEB-INF/classes or WEB-INF/lib of a war.
4. Inter deployment dependencies - These are dependencies on other deployments in an ear deployment. This can include classes in an ear's lib directory, or classes defined in other ejb jars.
However, I do not understand the DIFFERENCE between #2 and #3. What kind of dependencies could be classified under category 2 above vs category 3. To me, they look the same.
As an example of migrating my Spring application from JBoss 4 to JBoss 7, I encountered a NoClassDefError for quartz 1.6 jar that our application had been using. The quartz 1.6 jar is right inside the WEB-INF/lib folder of my application. This means it correctly falls under Category 3 above. But most articles on web indicate that I have to put it in either as a JBoss 7 module or define it in the jboss-deployment-structure.xml. Why ???
I have also read the migration guidelines and did the TattleTale exercise as pointed in those guidelines. But don't quite get it on what do I do with the report? I read the answer to this Best Practice for loading 3rd party JARs in JBoss AS7 standalone deployment? - looks like quite some amount of effort will be required for the migration. Does not seem like a quick trivial task considering the numerous dependencies an application can easily have. Can someone please confirm this?
I guess I need a guideline about
For which jars do I create a module.xml? (Possible candidates -
Spring, Quartz, Apache , C3P0 connection pools etc) ???
For which jars do I have a jboss-deployment-structure.xml? (What
could be good candidates here?)
For which jars do I leave them in web-inf/lib folder? (Application
uses certain specialized math libraries - like colt.jar, excel
graphing libraries like - jxls.jar, poi.jar - these seem like good
candidates here).
JBoss AS releases used to manage their set of libraries in different ways. Earlier, Release 4.x was used to define the core server
libraries into the JBOSS_HOME/server libraries. Thereafter, each server definition had its specific library into the server//lib folder.
JBoss AS 7 follows a real modular approach deprecating all earlier approaches. The server bootstrap libraries are now located at the root of the application server. There you can find the jboss-modules.jar archive, which is all you need to bootstrap the new application server kernel, based on the JBoss modules.
For which jars do I create a module.xml? (Possible candidates -
Spring, Quartz, Apache , C3P0 connection pools etc) ???
If there are any dependency jars those could be created as modules and define in the module.xml. Also you need to defined the dependencies of the define library.
ex.
<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.1" name="rezg.rezg-dto">
<dependencies>
<module name="org.apache.log4j" />
</dependencies>
<resources>
<resource-root path="rezg-dto-1.0.0.jar"/>
</resources>
</module>
Connection pool can be configured as a module and the procedure for installing a new module
requires copying the .jar libraries in the appropriate modules path and adding a
module.xml file, which declares the module and its dependencies.
For which jars do I have a jboss-deployment-structure.xml? (What could
be good candidates here?)
All the dependency jars should be defined in here. Also you can define either in the MANIFEST.MF or standalone.xml.
For which jars do I leave them in web-inf/lib folder? (Application
uses certain specialized math libraries - like colt.jar, excel
graphing libraries like - jxls.jar, poi.jar - these seem like good
candidates here).
If there are any jars which is used only in your ear or war then those could be defined in WEB-INF/lib.
However, it is recommend to use as modules.
i have EAR and an EJB project. I noticed eclipse (sts) creates and earContent folder so I assume this is where I need to add external jars.
I added my hibernate and log4j jars on this folder but my EJB classes cannot resolve Logger class and hibernate classes.
What's the correct way of adding these jars? or should I just add them to the EJB build path?
Add jars to ear project EarContent folder
In Eclipse Right click ejb project, Properties
Deployment Assembly - Manifest Entries - Add
Choose your jars to add, OK
OK
jars now added to manifest in ejb project, should work.
I'm looking at this in a project for the first time, I'd be very surprised if there wasn't a better solution to this that doesn't require Maven. The Java EE Tools - Update EAR Libraries option looks particularly suspicious, but doesn't seem to do the above. Note I'm on Helios still.
Add those jars under folder EarContent/lib directly , then all is done.
I.E., EarContent/lib/foo.jar will work but EarContent/lib/dir/foo.jar won't.
I have been working on this problem for one whole day but in vain without any effective solution.
I have an ear file packaged with an ejb and a handful of jar files (including hibernate and the other dependent jar files).The ejb is stateless and enabled as a web service.
The ear file has been packaged using maven and has the below structure
ear->projectrelatedejb.jar
->hibernate.jar
->otherdependent. jar
->META-INF/application.xml
->META-INF/manifest.mf
The application.xml and manifest file are automatically generated by maven when I do a package.
When I deploy this ear file on glassfish it gets deployed with the ejb methods being accessible using web services. However when accessing the application (using soapui),
the ejb methods that perform some database functionality using hibernate throw java.lang.NoClassDefFoundError for the hibernate api during runtime.
It is obvious from the error that the hibernate jars are not on the classpath during runtime but since the jars are within the ear Glassfish should have
added it to the application classpath.
I tried various options like adding the classpath entries to the manifest.mf during the package (by using the element addClasspath with the maven-ear-plugin) which didn't do any good.Also with Glassfish we cannot add the dependent jars as modules to the application.xml unless the jars are application client jars
(Glassfish wouldn't deploy the ear file if the application.xml has the dependent jars declared as modules).
I also tried placing the jars in the lib directory within the ear (which isn't actually required) and with the manifest Class-Path header referencing the jars in the lib directory which also didn't fix the problem.
The quick and dirty fix which I can do to get this working is to place the hibernate and the other the dependent jars in Glassfish's lib directory.However,this is a bad practice
and I am somewhat reluctant to do it.
I would really appreciate if someone can provide me with a working solution to this problem.I have gone through the net looking for this problem
but couldn't find any solution.
Wondering if its a bug with glassfish or does glassfish need something special to reference the jars in an ear.
Thanks in advance.
I found a similar problem which is discussed here: http://www.tricoder.net/blog/?p=59.
Simply put, try putting the libraries in EAR/lib directory and according to JEE5 spec, glassfish will add them to class path automatically.
I used Server Library option to deploy application JARs and it worked for me.
Right click on your EAR-> Properties -> Libraries-> Add Library -> Create -> give name and change type in Library Type to Server Libraries then add JARs that should be deployed and confirm.
I work with NetBeans 7.0.1 and GlassFish server 3.1
When you say you added classpath entries to manifest.mf, which manifest.mf do you refer to? The one in ear-root/META-INF/manifest.mf ? Try adding a META-INF/MANIFEST.MF to your ejb module with Class-Path entries!
I changed the version from jFreeChart in the pom.xml of my maven project from 1.0.12 to 1.0.13.
Now I get the error
"The type org.jfree.ui.layer cannot be resolved to a type. It is indirectly referenced from required class files."
What does this mean? I just updated the jfreechart dependency.
The type is in the JCommons library. I think the problem is that the JFreeChart has not been properly distributed to maven in version 1.0.13. In the IBiblio directory listing, you can see that a .pom file is missing (as opposed to version 1.0.12, where it's present).
This means that maven has no ideas what the dependencies are. It still downloads the artifact through it's filename by convention, but it doesn't know anything about the context.
Now you can either complain to the vendor and demand a proper pom or create your own pom file (start with the old version and adjust it until things start working) and deploy it to your company's repository (or your local repository) using install:install-file or deploy:deploy-file.
My guess is that you'll at least have to include the following dependency
<dependency>
<groupId>jfree</groupId>
<artifactId>jcommon</artifactId>
<version>1.0.15</version>
</dependency>
(If you want to do it the easy way, just add the above dependency to your own project pom)