Yes.
Are you looking for a way to share info across multiple instances of
the UDF? You can share static information via UDFContext. If you
want to share state while running that is very difficult and not
recommended (since there is no guarantee that your various map or
reduce instances
so if i make the list static also, it will be created multiple times as each
instance will be created in different machine's JVM .
is that correct?
On Thu, Mar 17, 2011 at 11:59 PM, Alan Gates wrote:
> It will be instantiated multiple times; once for each map or reduce
> (depending on which it
It will be instantiated multiple times; once for each map or reduce
(depending on which it is in). Pig itself also constructs your UDF
during planning on the machine you launch your job on.
Alan.
On Mar 17, 2011, at 11:12 AM, souri datta wrote:
Hi,
If in a UDF , say in the constructo
Hi,
If in a UDF , say in the constructor of the class, i initialize a list
(say ArrayList namesList) of objects(say names). And in the exec()
method , I do some processing. When I am using this udf in a 20 node hadoop
cluster, will this list 'nameList' be instantiated multiple times or will
