Program: 125029
Project: 125029
Buggy source:
@Override public ConnectionStatus testConnection(IMetadataConnection metadataConnection){
  classLoader=HBaseClassLoaderFactory.getClassLoader(metadataConnection);
  ConnectionStatus connectionStatus=new ConnectionStatus();
  connectionStatus.setResult(false);
  ClassLoader oldClassLoaderLoader=Thread.currentThread().getContextClassLoader();
  try {
    Thread.currentThread().setContextClassLoader(classLoader);
    Object config=ReflectionUtils.invokeStaticMethod("String_Node_Str",classLoader,"String_Node_Str",new Object[0]);
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str",metadataConnection.getServerName()});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str",metadataConnection.getPort()});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    Callable<Object> callable=checkHBaseAvailable(config);
    ExecutorService executor=Executors.newSingleThreadExecutor();
    Future<Object> future=executor.submit(callable);
    try {
      future.get(10,TimeUnit.SECONDS);
      connectionStatus.setResult(true);
    }
 catch (    Exception e) {
      future.cancel(true);
      connectionStatus.setResult(false);
      connectionStatus.setMessageException("String_Node_Str");
      ThreadGroup group=Thread.currentThread().getThreadGroup();
      int activeCount=group.activeCount();
      Thread[] allThreads=new Thread[activeCount];
      group.enumerate(allThreads);
      Thread foundThread=null;
      for (      Thread t : allThreads) {
        if (t.getClass().getName().equals("String_Node_Str")) {
          foundThread=t;
          break;
        }
      }
      if (foundThread != null) {
        foundThread.getClass().getDeclaredMethods();
        Method method=foundThread.getClass().getDeclaredMethod("String_Node_Str");
        method.setAccessible(true);
        method.invoke(foundThread);
      }
      Class ownerClass=Class.forName("String_Node_Str",true,classLoader);
      Method[] methods=ownerClass.getMethods();
      Method m2=null;
      for (      Method method : methods) {
        Class<?>[] parameterTypes=method.getParameterTypes();
        if ("String_Node_Str".equals(method.getName()) && parameterTypes.length == 1 && "String_Node_Str".equals(parameterTypes[0].getName())) {
          m2=method;
        }
      }
      if (m2 != null) {
        m2.setAccessible(true);
        m2.invoke(null,true);
      }
    }
  }
 catch (  Exception e) {
    ExceptionHandler.process(e);
    connectionStatus.setMessageException(e.getStackTrace() == null ? e.getMessage() : e.getStackTrace().toString());
  }
 finally {
    Thread.currentThread().setContextClassLoader(oldClassLoaderLoader);
  }
  return connectionStatus;
}

Fixed version (ground truth):
@Override public ConnectionStatus testConnection(IMetadataConnection metadataConnection){
  classLoader=HBaseClassLoaderFactory.getClassLoader(metadataConnection);
  ConnectionStatus connectionStatus=new ConnectionStatus();
  connectionStatus.setResult(false);
  ClassLoader oldClassLoaderLoader=Thread.currentThread().getContextClassLoader();
  try {
    Thread.currentThread().setContextClassLoader(classLoader);
    Object config=ReflectionUtils.invokeStaticMethod("String_Node_Str",classLoader,"String_Node_Str",new Object[0]);
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str",metadataConnection.getServerName()});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str",metadataConnection.getPort()});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    ReflectionUtils.invokeMethod(config,"String_Node_Str",new Object[]{"String_Node_Str","String_Node_Str"});
    Callable<Object> callable=checkHBaseAvailable(config);
    ExecutorService executor=Executors.newSingleThreadExecutor();
    Future<Object> future=executor.submit(callable);
    try {
      int timeout=15;
      if (GlobalServiceRegister.getDefault().isServiceRegistered(IDesignerCoreService.class)) {
        IDesignerCoreService designerService=(IDesignerCoreService)GlobalServiceRegister.getDefault().getService(IDesignerCoreService.class);
        timeout=designerService.getDesignerCorePreferenceStore().getInt(ITalendCorePrefConstants.DB_CONNECTION_TIMEOUT);
      }
      future.get(timeout,TimeUnit.SECONDS);
      connectionStatus.setResult(true);
    }
 catch (    Exception e) {
      future.cancel(true);
      connectionStatus.setResult(false);
      connectionStatus.setMessageException("String_Node_Str");
      ThreadGroup group=Thread.currentThread().getThreadGroup();
      int activeCount=group.activeCount();
      Thread[] allThreads=new Thread[activeCount];
      group.enumerate(allThreads);
      Thread foundThread=null;
      for (      Thread t : allThreads) {
        if (t.getClass().getName().equals("String_Node_Str")) {
          foundThread=t;
          break;
        }
      }
      if (foundThread != null) {
        foundThread.getClass().getDeclaredMethods();
        Method method=foundThread.getClass().getDeclaredMethod("String_Node_Str");
        method.setAccessible(true);
        method.invoke(foundThread);
      }
      Class ownerClass=Class.forName("String_Node_Str",true,classLoader);
      Method[] methods=ownerClass.getMethods();
      Method m2=null;
      for (      Method method : methods) {
        Class<?>[] parameterTypes=method.getParameterTypes();
        if ("String_Node_Str".equals(method.getName()) && parameterTypes.length == 1 && "String_Node_Str".equals(parameterTypes[0].getName())) {
          m2=method;
        }
      }
      if (m2 != null) {
        m2.setAccessible(true);
        m2.invoke(null,true);
      }
    }
  }
 catch (  Exception e) {
    ExceptionHandler.process(e);
    connectionStatus.setMessageException(e.getStackTrace() == null ? e.getMessage() : e.getStackTrace().toString());
  }
 finally {
    Thread.currentThread().setContextClassLoader(oldClassLoaderLoader);
  }
  return connectionStatus;
}