[jira] [Created] (HIVE-3799) Better error message if metalisteners or hookContext cannot be loaded/instantiated

["Sudhanshu Arora (JIRA)" <ji...@apache.org>]

Sudhanshu Arora created HIVE-3799:
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             Summary: Better error message if metalisteners or hookContext cannot be loaded/instantiated
                 Key: HIVE-3799
                 URL: https://issues.apache.org/jira/browse/HIVE-3799
             Project: Hive
          Issue Type: Bug
          Components: Logging
    Affects Versions: 0.9.0
            Reporter: Sudhanshu Arora


If I am not able to instantiate MetaListener or HookContext because of some dependent class missing, the only error I get is InvocationTargetException.  MetaStoreUtils.getMetaListener should be changed as following:
try {
        T listener = (T) Class.forName(
            listenerImpl.trim(), true, JavaUtils.getClassLoader()).getConstructor(
                Configuration.class).newInstance(conf);
        listeners.add(listener);
      } catch (InvocationTargetException e) {
        throw new MetaException("Failed to instantiate listener named: "+
            listenerImpl + " reason: " + e.getCause().toString());
      } catch (Exception e) {
        throw new MetaException("Failed to instantiate listener named: "+
            listenerImpl + " reason: " + e.toString());
      }

Similarly Driver.getHooks should be changed to handle InvocationTargetException in a better way.

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