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https://issues.apache.org/jira/browse/HIVE-3799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Phabricator updated HIVE-3799:
------------------------------

    Attachment: HIVE-3799.D7719.1.patch

navis requested code review of "HIVE-3799 [jira] Better error message if 
metalisteners or hookContext cannot be loaded/instantiated".
Reviewers: JIRA

  DPAL-1949 Better error message if metalisteners or hookContext cannot be 
loaded/instantiated

  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.

TEST PLAN
  EMPTY

REVISION DETAIL
  https://reviews.facebook.net/D7719

AFFECTED FILES
  metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreUtils.java
  ql/src/java/org/apache/hadoop/hive/ql/Driver.java
  ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java

MANAGE HERALD DIFFERENTIAL RULES
  https://reviews.facebook.net/herald/view/differential/

WHY DID I GET THIS EMAIL?
  https://reviews.facebook.net/herald/transcript/18513/

To: JIRA, navis

                
> 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: Improvement
>          Components: Diagnosability, Logging
>    Affects Versions: 0.9.0
>            Reporter: Sudhanshu Arora
>            Priority: Trivial
>         Attachments: HIVE-3799.D7719.1.patch
>
>
> 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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