Why does a java applet throw an exception when running?

Question

Java

The problem is this. There is a java application that can run as a desktop application and as an applet. Previously, it used the library:

<dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpasyncclient</artifactId>
      <version>4.0.2</version>
</dependency>

Now it was required to pass to version 4.1.1.
Now, when the application is launched as an applet, it throws an exception:

Exception on executing task: Truncated class file java.lang.ClassFormatError: Truncated class file 
  at java.lang.ClassLoader.defineClass1(Native Method) 
  at java.lang.ClassLoader.defineClass(Unknown Source) 
  at java.security.SecureClassLoader.defineClass(Unknown Source) 
  at java.net.URLClassLoader.defineClass(Unknown Source) 
  at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source) 
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
  at java.lang.reflect.Method.invoke(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader.defineClassHelper(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader.access$100(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source) 
  at java.security.AccessController.doPrivileged(Native Method) 
  at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source) 
  at sun.plugin2.applet.JNLP2ClassLoader.findClass(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) 
  at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) 
  at java.lang.ClassLoader.loadClass(Unknown Source) 
  at ru.kih.sin.client.core.HttpUrlRemoteClientFactory$1.call(HttpUrlRemoteClientFactory.java:37) 
  at ru.kih.sin.client.core.HttpUrlRemoteClientFactory$1.call(HttpUrlRemoteClientFactory.java:25) 
  at ru.kih.util.LazyInitialiser.get(LazyInitialiser.java:85) 
  at ru.kih.sin.client.core.HttpUrlRemoteClientFactory.newInstance(HttpUrlRemoteClientFactory.java:63) 
  at ru.kih.sin.client.core.HttpUrlRemoteClientFactory.newInstance(HttpUrlRemoteClientFactory.java:23) 
  at ru.kih.glue.BindingRule.newInstance(BindingRule.java:42) 
  at ru.kih.glue.Glue.get(Glue.java:43) 
  at ru.kih.sin.client.rpc.RpcBeansFactory.newInstance(RpcBeansFactory.java:62) 
  at ru.kih.sin.client.rpc.RpcBeansFactory.newInstance(RpcBeansFactory.java:23) 
  at ru.kih.glue.BindingRule.newInstance(BindingRule.java:42) 
  at ru.kih.glue.NewInstanceCallback.call(NewInstanceCallback.java:18) 
  at ru.kih.glue.NewInstanceCallback.call(NewInstanceCallback.java:9) 
  at ru.kih.glue.Waiter.call(Waiter.java:29) 
  at ru.kih.glue.WaiterCall.run(WaiterCall.java:18) 
  at ru.kih.glue.DelayedExecutor.execute(DelayedExecutor.java:30) 
  at ru.kih.glue.Instancer.register(Instancer.java:89) 
  at ru.kih.glue.Glue.bind(Glue.java:98) 
  at ru.kih.sin.client.core.ServerConnectionInitializer.init(ServerConnectionInitializer.java:29) 
  at ru.kih.sin.client.core.ApplicationImpl.loadInitializers(ApplicationImpl.java:99) 
  at ru.kih.sin.client.core.ApplicationImpl.access$100(ApplicationImpl.java:31) 
  at ru.kih.sin.client.core.ApplicationImpl$1.run(ApplicationImpl.java:63) 
  at ru.kih.sin.client.core.AbstractApplication$3.run(AbstractApplication.java:255) 
  at ru.kih.concurrent.task.Task.run(Task.java:53) 
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
  at java.lang.Thread.run(Unknown Source)

In the desktop version everything works fine.
Tell me what could be the reason?

Answer 1

Try to look here

Answer 2

Try to select a later version of Java in the IDE.