Sunil's Notes: Spark error class "javax.servlet.FilterRegistration"'s signer information does not match signer information of other classes in the same package

I had this Spark Program that was working from both IDE and when i built a .jar file and deployed it in Spark. But it suddenly stopped working in IDE, whenever i tried executing in IDE, i was following error


16/01/05 14:34:50 INFO SparkEnv: Registering OutputCommitCoordinator
Exception in thread "main" java.lang.SecurityException: class "javax.servlet.FilterRegistration"'s signer information does not match signer information of other classes in the same package
 at java.lang.ClassLoader.checkCerts(ClassLoader.java:895)
 at java.lang.ClassLoader.preDefineClass(ClassLoader.java:665)
 at java.lang.ClassLoader.defineClass(ClassLoader.java:758)
 at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
 at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
 at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
 at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
 at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 at org.spark-project.jetty.servlet.ServletContextHandler.(ServletContextHandler.java:136)
 at org.spark-project.jetty.servlet.ServletContextHandler.(ServletContextHandler.java:129)
 at org.spark-project.jetty.servlet.ServletContextHandler.(ServletContextHandler.java:98)
 at org.apache.spark.ui.JettyUtils$.createServletHandler(JettyUtils.scala:101)
 at org.apache.spark.ui.JettyUtils$.createServletHandler(JettyUtils.scala:92)
 at org.apache.spark.ui.WebUI.attachPage(WebUI.scala:78)
 at org.apache.spark.ui.WebUI$$anonfun$attachTab$1.apply(WebUI.scala:62)
 at org.apache.spark.ui.WebUI$$anonfun$attachTab$1.apply(WebUI.scala:62)
 at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
 at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
 at org.apache.spark.ui.WebUI.attachTab(WebUI.scala:62)
 at org.apache.spark.ui.SparkUI.initialize(SparkUI.scala:50)
 at org.apache.spark.ui.SparkUI.(SparkUI.scala:61)
 at org.apache.spark.ui.SparkUI$.create(SparkUI.scala:151)
 at org.apache.spark.ui.SparkUI$.createLiveUI(SparkUI.scala:106)
 at org.apache.spark.SparkContext.(SparkContext.scala:300)
 at com.mapr.QS.PMDriver$.main(PMDriver.scala:32)
 at com.mapr.QS.PMDriver.main(PMDriver.scala)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

Process finished with exit code 1

So the problem it seems is that order of javax.servlet:servlet-api.jar was wrong. I opened the Project setting and moved the dependency jar to the end of the list and it started working. This is the screen shot of Intellij settings