They should be viewable if you enable the DEBUG mode.
hive -hiveconf hive.root.logger=DEBUG,console
On Thu, Mar 21, 2013 at 1:31 AM, Marc Limotte <mslimo...@gmail.com> wrote:
> Hi.
>
> I'm trying to understand what happens to Exceptions that are thrown by
> custom UDFs. I have a UDF that throws a RuntimeException with useful
> debugging information, but I don't see it in any logs. I'm running my
> commands using the hive cli (Hive 0.9.0). Instead I see:
>
>> FAILED: Error in semantic analysis: Line 3:7 Wrong arguments '600':
>> org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute method …
>> evaluate(...) on object ...
>> Command exited with non-zero status 10
>
>
> Despite the "semantic analysis" error, I know it's getting to the
> evaluate(…) method because of other log messages.
>
> Looking in org.apache.hadoop.hive.ql.exec.FunctionRegistry, I find the
> invoke method, which contains:
>
> public static Object invoke(Method m, Object thisObject, Object...
> arguments)
> throws HiveException {
> Object o;
> try {
> o = m.invoke(thisObject, arguments);
> } catch (Exception e) {
> ...
> throw new HiveException("Unable to execute method " + m + " "
> + " on object " + thisObjectString + " with arguments "
> + argumentString.toString(), e);
> }
> return o;
> }
>
> So it appears that my RuntimeException is wrapped in HiveException. But
> then it looks like only the Exception message is printed by the hive cli.
> Does the stack trace and root cause get printed in some log? I didn't find
> it anywhere.
>
>
> Marc
>
--
Harsh J
