I create a JCo Adapter, and add the sapjco.jar to the server/lib directory and put the required dll file to windows\system32 directory. But it still report the exception as following in the server:
Invocation of procedure 'invokeSAPFunction' caused java.lang.NoClassDefFoundError: com/sap/mw/jco/JCO$Exception
What reason? Thanks a lot.
The JCO libraries need to be put on a path where the JRE can read them. It looks like you have put them on the server path.
There should be installations instructions included when you downloaded the JCO libraries from SAP.
Related
I have a class in a Mule application which resides in a jar of a third party library. The library gets included in the lib folder after the project builds so it is definitely in the classpath. The class is then used in a Mule component. The applications deploys successfully in AnyPoint Studio'sembedded server. However, when the Mule component is processing data, Mule complains that it can't find the class.
As soon as the line with the following code snippet is encountered it throws the NoClassDefFoundError.
populator.put(ScanType.MRI,container);
Here is a portion of the stacktrace:
Root Exception stack trace:
java.lang.ClassNotFoundException: com.tcfg.utils.defn.Populator
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at org.mule.module.launcher.FineGrainedControlClassLoader.findClass(FineGrainedControlClassLoader.java:175)
at org.mule.module.launcher.MuleApplicationClassLoader.findClass(MuleApplicationClassLoader.java:134)
at org.mule.module.launcher.FineGrainedControlClassLoader.loadClass(FineGrainedControlClassLoader.java:119)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
I also know that this is the only instance of the class in the whole project when I use a tool to search the entire lib folder for instances of the class. This is definitely not a situation of multiple versions of the class or of other classes existing in one of the jars with a similar name. What could be the cause of this and how can I resolve it?
Even though if you add the jar in lib folder you need to manually add that jar to your class path.So, that it will be available.
They are 2 possibilities here one is there might be a need of OS specific library to be downloaded and configured in Anypoint Stduio in Run configurations like for SAP we need to point it to the DLL which windows will refer to. Giving below an example.
-Djava.library.path=C:\Users\adm-snandu\AnypointStudio\workspace\
For most of the Class Notfound errors you need to make sure the maven dependency is given in the pom.xml which takes care of downloading all the relevant libraries and referring to them during run time.
I am working on TIFF to JPEG conversion program. I am using the TIFF implementation from jai-imageio-core.1.3.1.jar, which is available in the classpath.
Everything works fine in my local environment in eclipse (running on tomcat server). However, when I deploy the same in Weblogic, I am getting the following error. Weblogic server is unable to recognize the TIFF implementation classes. I am unable to find the missing link. Please help.
java.lang.NoClassDefFoundError: com/github/jaiimageio/impl/plugins/tiff/TIFFImageReader
at com.github.jaiimageio.impl.plugins.tiff.TIFFImageReaderSpi.createReaderInstance(TIFFImageReaderSpi.java:118)
at javax.imageio.spi.ImageReaderSpi.createReaderInstance(ImageReaderSpi.java:320)
at javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:529)
at javax.imageio.ImageIO$ImageReaderIterator.next(ImageIO.java:513)
at javax.imageio.ImageIO.read(ImageIO.java:1443)
at javax.imageio.ImageIO.read(ImageIO.java:1308)
I will answer my own question. The issue is resolved. The problem was with the the jai-imageio-core.1.3.1.jar file present in multiple places. It was present in my application war file in WEB-INF/lib folder. however, the same jar file was also present outside the war in the weblogic adm root directory. (my bad)
I guess weblogic clearly expects the jar file only in 1 place (especially java SPI implementation jar)
It is also a good idea to search all directories under weblogic to make sure there are no additional jar files of the same name.
I had only one jai-imageio-core.1.3.1.jar file (in WAR file) and caught this error. Weblogic managed server restart helped me.
I have a dll which provides a simple functionality (called HelloCpp.dll) and
I need to access to the content of this library from Karaf container via REST calls.
I created a simple maven bundle which provides the REST api and a class (HelloJNI) which loads HelloCpp.dll using: System.loadLibrary("HelloCpp");
I have also addressed this dll in my POM file using: <Bundle-NativeCode>HelloCpp.dll</Bundle-NativeCode>
I have coppied the dll in both project directory and also karaf/lib folder.
I can successfuly install the bundle and I don't receive any compilation error as well, but when I deploy my bundle into Karaf container and try to start bundle, I get this error message: No matching native libraries found.
Could you please help me to solve the problem? Maybe I don't address the dll correctly in the POM file.
Thanks in advance,
Mandana
If I run the application in server, which is working fine, but If i run application in anypoint studio doesn't run. Here is the error message for loading oracle driver.
error message:
2015-02-04 11:18:34 WARN DriverManagerDataSource:107 - Could not load driverClass oracle.jdbc.OracleDriver
java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
I have placed all jdbc and other jars under studio->project->properties->libraries.
This is caused by the Studio's classloading policies. The workaround is to copy the JDBC Driver .jar to ${studio.home}/plugins/org.mule.tooling.server.${mule.version}.ee_${mule.version}.${release.date}/mule/lib/user
Hi there actually that's kind of a hack :P though it works.
The more proper way to deal with this is, when coding your application (that's why one should use Mule Studio), to place the jars like drivers in a particular folder, like a /lib in the root of you project.
Then add these jars to the classpath.
I know what you did is the way it should be done when running on Mule stand alone in order to share such jars but try this one if you can ;)
I was also facing the same problem. As the application runtime fails to locate the jdbc driver jar in classpath So It is unable to load the same.
the simple and easiest way to handle this error is just put your lib folder containing the ojdbc jar file inside the app resource (src/main/app) of the project. During the building of project it will automatically be place in classpath.
I have tried the same approach and It works for me.
Hope this helps.
The way I fixed the problem was removing the .classpath / .project files from my project root folder. I re-imported the project and then I saw a bin folder created. I removed this bin folder then right-click on the project -> Refresh and then Run As -> Mule Application.
I am succeeded to call a c++ library from my JAVA code using JNI.Now I want to load the same. dll from a eclipse plugin and call the library functions.I kept the library in root directory of the plugin folder .
I am getting error like:
Caused by: java.lang.UnsatisfiedLinkError: testproj.testClass.testCall:()V
please help me to resolve that.Why the same code working for Java but not working from plugin?
Got it the package and class name should be same in the plug in and also the dll should be in the same root folder of the .java file where u load the library