I am trying to send an email from a Java Application but whenever I run the code found online here
When I run the code I receive this error:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException
at nameInProgress.Driver.main(Driver.java:69)
Caused by: java.lang.ClassNotFoundException: javax.mail.MessagingException
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 1 more
I'm pretty sure that the problem is relating to how I have attached the source (I am not using maven), I have viewed some other solutions on here, the highest suggests attaching a source code zip, but the link to that file is no longer valid and I cannot find it on my own.
EDIT: I have created a build path to JavaMail but I am still receiving this error.
As you stated, you don't have the javax mail jar/dependency. If you aren't using a dependency manager then you'll need to get the jar and add it to your classpath. I found a link for the jar here.
Related
When The Program is Ran in the Local PC, it is working fine, but if it is running in the docker throws the following error:
Exception in thread "Thread-16" java.lang.NoClassDefFoundError: org/apache/kafka/common/serialization/Serializer
at org.eclipse.kura.example.configurable.ConfigurableExample$1.run(ConfigurableExample.java:52)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.apache.kafka.common.serialization.Serializer cannot be found by org.eclipse.kura.example.configurable_1.0.0.202201251713
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:484)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:395)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:387)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:150)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 2 more
But this is working fine in the LocalMachine.
What is the issue ?
This may be debugged in following ways:
Ensure that you have all the required dependencies inside your docker container. You may want to check your docker base image first.
Check if you have set the classpath appropriately to include that jar file (kafka-clients).
Validate your entrypoint/cmd which you use to start the service to check if it has the appropriate classpath.
Check your classloader and see why it is not able to load that class.
If your executable is a fat jar file, check if that jar file contains the kafka-clients library where that class is present.
I am trying to run a java program that sends and receives messages to and from Azure Storage Queues; however, I keep getting the following ClassNotFoundException at runtime. I am having a hard time finding the jars necessary to fix it. Nothing I have found so far actually solves the problem.
Exception in thread "main" java.lang.NoClassDefFoundError: com/azure/storage/common/policy/RequestRetryOptions
at com.azure.storage.queue.QueueServiceClientBuilder.<init>(QueueServiceClientBuilder.java:83)
at com.cloudproject.azure.Connector.initiateConnection(Connector.java:58)
at com.cloudproject.server.ConnectionServer.main(ConnectionServer.java:30)
Caused by: java.lang.ClassNotFoundException: com.azure.storage.common.policy.RequestRetryOptions
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 3 more
I am not using maven in the build process, though I have pulled several jars from the maven repository - none of which have helped.
This seems to have been fixed by including the azure-storage-common jar, which I pulled from here. Not sure how I overlooked this one earlier.
Trying to run my flex project and I get the below error ,
Please suggest any way forward :-
Caused by:
java.lang.LinkageError: ClassCastException: attempting to castjar:file:/software/bea/java/jdk1.8.0_152/jre/lib/rt.jar!/javax/xml/ws/spi/Provider.class to zip:/wls_domains/abct22/servers/managed13_abct22/tmp/_WL_user/xyz/2o9q1y/war/WEB-INF/lib/jaxws-api.jar!/javax/xml/ws/spi/Provider.class
at javax.xml.ws.spi.Provider.provider(Provider.java:94)
at javax.xml.ws.Service.<init>(Service.java:56)
at com.oracle.xmlns.communications.ordermanagement.OrderManagementService.<init>(OrderManagementService.java:71)
at com.df.abc.action.np.npAction.omsWebSerCall(npAction.java:3741)
at com.df.abc.action.np.npAction.omsWebServiceCall(npAction.java:3683)
... 73 more
You have two versions of the same jar on the classpath. The error mean that you have an object created from one jar which the code tries to cast to the other jar, which doesn’t work.
This is not an uncommon problem.
Revise your deployment not to include the jaxws-api.jar as long as you are still deploying to a Java 8 server.
Application Build got successful but getting the following error :
Exception in thread "Thread-29" java.lang.NoClassDefFoundError: org/apache/hadoop/util/ShutdownHookManager$2
at org.apache.hadoop.util.ShutdownHookManager.getShutdownHooksInOrder(ShutdownHookManager.java:124)
at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:52)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.util.ShutdownHookManager$2
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
... 2 more
I added this hadoop-common jar which has this class in pom file, classpath or any possible way i knew and could google but nothing worked.
It looks like a runtime problem. What I understand is that ClassRealm is trying to load a class at runtime and that class is not present in the jar. Just give it a look to the SelfFirstStrategy.java:50 and check if the class that is trying to be loaded actually exists.
I am trying to build a facebook connector using facebook4j jar.
Whatever I have coded is working fine if I run the classes from eclipse directly, but if when I am trying to create a jar file of my connector which has facebook4j jar as well, and use it in some other Project, I am getting below error:
Exception in thread "main" java.lang.NoClassDefFoundError: facebook4j/FacebookException
at FacebookMain.main(FacebookMain.java:18)
Caused by: java.lang.ClassNotFoundException: facebook4j.FacebookException
I am creating jar file from eclipse only and have checked below option
Export generated class file and resource
Any guidance will be helpful.