Selenium sample program - java

1.The following run time error is occurred while executing this program
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class webclass
{
public static void main(String[] args)
{
FirefoxDriver driver = new FirefoxDriver();
driver.get("http://www.google.com");
}
}
Exception:
Exception in thread "main" java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.openqa.selenium.webclass.main(webclass.java:15)

Related

await method causing incompatibleClassChangeError: implementing class

I'm using play-1.2.5. For async I'm using await() method in my controller. but that await() causing IncompatibleClassChangeError during my application startup. I really don't understand the reason.
when I comment await() line, that error gone away.
here is my Contoller action:
public static void loadScheduledConfigs() {
Future<JsonObject> future = Startup.THREAD_POOL.submit(new MyCallable());
JsonObject object = null;
/*
I also tried this
Future<JsonObject> future = new FutureTask<JsonObject>( new MyCallable());
JsonObject object = await(future);
*/
try{
object = future.get();
}catch(Exception e) {
log.error(e.getMessage(), e);
}
renderJSON(object);
}
Exception:
Oops: IncompatibleClassChangeError
An unexpected error occured caused by exception IncompatibleClassChangeError: Implementing class
play.exceptions.UnexpectedException: Unexpected Error
at play.Invoker$Invocation.onException(Invoker.java:244) ~[play-1.2.5rc4.jar:na]
at play.Invoker$Invocation.run(Invoker.java:286) ~[play-1.2.5rc4.jar:na]
at Invocation.HTTP Request(Play!) ~[na:na]
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_07]
at java.lang.ClassLoader.defineClass(ClassLoader.java:791) ~[na:1.7.0_07]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.7.0_07]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[na:1.7.0_07]
at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[na:1.7.0_07]
at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.7.0_07]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_07]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_07]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_07]
at java.lang.ClassLoader.loadClass(ClassLoader.java:423) ~[na:1.7.0_07]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[na:1.7.0_07]
at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ~[na:1.7.0_07]
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_07]
at java.lang.ClassLoader.defineClass(ClassLoader.java:791) ~[na:1.7.0_07]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.7.0_07]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[na:1.7.0_07]
at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[na:1.7.0_07]
at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.7.0_07]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_07]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_07]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_07]
at java.lang.ClassLoader.loadClass(ClassLoader.java:423) ~[na:1.7.0_07]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[na:1.7.0_07]
at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ~[na:1.7.0_07]
at play.classloading.enhancers.ContinuationEnhancer.enhanceThisClass(ContinuationEnhancer.java:74) ~[play-1.2.5rc4.jar:na]
at play.CorePlugin.enhance(CorePlugin.java:297) ~[play-1.2.5rc4.jar:na]
at play.plugins.PluginCollection.enhance(PluginCollection.java:551) ~[play-1.2.5rc4.jar:na]
at play.classloading.ApplicationClasses$ApplicationClass.enhance(ApplicationClasses.java:235) ~[play-1.2.5rc4.jar:na]
at play.classloading.ApplicationClassloader.loadApplicationClass(ApplicationClassloader.java:167) ~[play-1.2.5rc4.jar:na]
at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:431) ~[play-1.2.5rc4.jar:na]
at play.Play.start(Play.java:516) ~[play-1.2.5rc4.jar:na]
at play.Play.detectChanges(Play.java:642) ~[play-1.2.5rc4.jar:na]
at play.Invoker$Invocation.init(Invoker.java:198) ~[play-1.2.5rc4.jar:na]
... 1 common frames omitted
I don't know either problem is in the way I code, or some dependencies comflict causing this issue. (I checked my lib folder and classpath/dependencies of my project, I did not find any conflicting library)

I got the solution. it's asm.jar who was creating issue. I'm using kryo for serialization. kryo and play both has asm.jar as a dependency. So i have two different version of asm.jar in my class path. one that comes with kryo and other one that comes with play framework. that was causing issue.
I removed one asm.jar and that exception gone away.

Sonar-Qube FindBugs-PlugIn Fails at Test while building because of missing ASM Class

A good day to you stackoverflow community
I am trying to modify the FindbugsPlugin for SonarQube, but I cannot get it to compile. It always stops at this test:
-------------------------------------------------------------------------------
Test set: org.sonar.plugins.findbugs.FindbugsExecutorTest
-------------------------------------------------------------------------------
Tests run: 4, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 1.673 sec <<< FAILURE! - in org.sonar.plugins.findbugs.FindbugsExecutorTest
canGenerateXMLReport(org.sonar.plugins.findbugs.FindbugsExecutorTest) Time elapsed: 1.268 sec <<< ERROR!
org.sonar.api.utils.SonarException: Can not execute Findbugs
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:156)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:97)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:93)
at org.sonar.plugins.findbugs.FindbugsExecutorTest.canGenerateXMLReport(FindbugsExecutorTest.java:51)
Caused by: java.lang.NoClassDefFoundError: org/objectweb/asm/ClassAdapter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.ClassAdapter
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
canGenerateXMLReportWithCustomConfidence(org.sonar.plugins.findbugs.FindbugsExecutorTest) Time elapsed: 0.216 sec <<< ERROR!
org.sonar.api.utils.SonarException: Can not execute Findbugs
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:156)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:97)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:93)
at org.sonar.plugins.findbugs.FindbugsExecutorTest.canGenerateXMLReportWithCustomConfidence(FindbugsExecutorTest.java:68)
Caused by: java.lang.NoClassDefFoundError: org/objectweb/asm/ClassAdapter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.ClassAdapter
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I already tried different versions of ASM, because it seems to be missing ClassAdaptor, but then it throws another error at me:
-------------------------------------------------------------------------------
Test set: org.sonar.plugins.findbugs.FindbugsExecutorTest
-------------------------------------------------------------------------------
Tests run: 4, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 1.115 sec <<< FAILURE! - in org.sonar.plugins.findbugs.FindbugsExecutorTest
canGenerateXMLReport(org.sonar.plugins.findbugs.FindbugsExecutorTest) Time elapsed: 0.509 sec <<< ERROR!
org.sonar.api.utils.SonarException: Can not execute Findbugs
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:156)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:97)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:93)
at org.sonar.plugins.findbugs.FindbugsExecutorTest.canGenerateXMLReport(FindbugsExecutorTest.java:51)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
canGenerateXMLReportWithCustomConfidence(org.sonar.plugins.findbugs.FindbugsExecutorTest) Time elapsed: 0.28 sec <<< ERROR!
org.sonar.api.utils.SonarException: Can not execute Findbugs
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:156)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:97)
at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:93)
at org.sonar.plugins.findbugs.FindbugsExecutorTest.canGenerateXMLReportWithCustomConfidence(FindbugsExecutorTest.java:68)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:47)
at edu.umd.cs.findbugs.classfile.engine.asm.ClassReaderAnalysisEngine.analyze(ClassReaderAnalysisEngine.java:34)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:72)
at edu.umd.cs.findbugs.classfile.engine.ClassInfoAnalysisEngine.analyze(ClassInfoAnalysisEngine.java:38)
at edu.umd.cs.findbugs.classfile.impl.AnalysisCache.getClassAnalysis(AnalysisCache.java:268)
at edu.umd.cs.findbugs.FindBugs2.buildReferencedClassSet(FindBugs2.java:891)
at edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:222)
at org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:211)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I am not able to pinpoint were I go wrong. Can anybody give me a hint please?

As explained here (http://www.sonarqube.org/get-support/), would be better to ask such question on the SonarQube Google Group (https://groups.google.com/forum/#!forum/sonarqube). But I've just double checked on my side that I was able to clone the "SonarQube Findbugs plugin" GitHub repository and build the project "mvn clean install" without any issue. So I suspect a potential corruption of your local Maven repository.

It seem I had a wrong version of the FindBugs.jar, so the ASM 3 of that jar interfered with the ASM 5 of Sonar.

Exception in java.lang.securityexception

I am getting this exception when i am trying to run a simple class from intellijIdea using spark
Exception in thread "Thread-0" java.lang.SecurityException: class "javax.servlet.SessionTrackingMode"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(ClassLoader.java:952)
at java.lang.ClassLoader.preDefineClass(ClassLoader.java:666)
at java.lang.ClassLoader.defineClass(ClassLoader.java:794)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at spark.webserver.SparkServerFactory.create(SparkServerFactory.java:33)
at spark.Spark$1.run(Spark.java:303)
at java.lang.Thread.run(Thread.java:744)

Neo4j - java.lang.NoClassDefFoundError: org/parboiled/scala/Parser

I try this Hello world example (https://github.com/neo4j/neo4j/blob/2.0.0/community/embedded-examples/src/main/java/org/neo4j/examples/EmbeddedNeo4j.java). I inserted into this example my method:
private void allNodes() {
ExecutionEngine engine = new ExecutionEngine(graphDb);
String query = "start n=node(*) return n";
ExecutionResult result = engine.execute(query);
System.out.println(result);
Iterator<Node> kindsOfFruit = result.columnAs("n");
while (kindsOfFruit.hasNext()) {
Node kindOfFruit = kindsOfFruit.next();
System.out.println(kindOfFruit.getId());
}
}
When i call this method, I get this error:
Hello, brave Neo4j World!Exception in thread "main" java.lang.NoClassDefFoundError: org/parboiled/scala/Parser
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.neo4j.cypher.internal.compiler.v2_0.CypherCompiler.<init>(CypherCompiler.scala:32)
at org.neo4j.cypher.internal.CypherCompiler$VersionProxy.<init>(CypherCompiler.scala:47)
at org.neo4j.cypher.internal.CypherCompiler$.apply(CypherCompiler.scala:37)
at org.neo4j.cypher.ExecutionEngine$$anonfun$createCorrectCompiler$2.apply(ExecutionEngine.scala:130)
at org.neo4j.cypher.ExecutionEngine$$anonfun$createCorrectCompiler$2.apply(ExecutionEngine.scala:128)
at scala.PartialFunction$AndThen.applyOrElse(PartialFunction.scala:185)
at org.neo4j.cypher.ExecutionEngine.createCorrectCompiler(ExecutionEngine.scala:132)
at org.neo4j.cypher.ExecutionEngine.<init>(ExecutionEngine.scala:37)
at org.neo4j.cypher.javacompat.ExecutionEngine.<init>(ExecutionEngine.java:53)
at org.neo4j.cypher.javacompat.ExecutionEngine.<init>(ExecutionEngine.java:43)
at hello.Hello.allNodes(Hello.java:111)
at hello.Hello.main(Hello.java:64)
Caused by: java.lang.ClassNotFoundException: org.parboiled.scala.Parser
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 108 more

Do you use a build tool? How do you run the program? This exception means, that some class that is used by neo4j can not be found. In this case it looks like you are missing the parboiled library on your classpath, which is used to parse cypher queries. When you add that (including all of its dependencies) it should work.

Error while running mapreduce program in eclipse

I am getting this error while running mapreduce program
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/yarn/service/CompositeService
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.yarn.service.CompositeService
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
please help

I assume your error is due to classpath issue, because you have a java.lang.NoClassDefFoundError
You should include your Yarn classes in your java.library.path. It may be done with contextual menu through add library ... or something like that depending on how formatted are your libraries (jar,class,etc).

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