Yes you can . Please make sure all Hadoop jars and conf directory is in classpath.
On Thu, Feb 9, 2012 at 7:02 AM, Sanjeev Verma <sanjeev.x.ve...@gmail.com>wrote: > This is based on my understanding and no real life experience, so going to > go out on a limb here :-)...assuming that you are planning on kicking off > this map-reduce job based on a event of sorts (a file arrived and is ready > to be processed?), and no direct "user wait" is involved, then yes, I would > imagine you should be able to do something like this from inside a MDB > (asynchronous so no one is held up in queue). Some random thoughts: > > 1. The user under which the app server is running will need to be a setup > as a hadoop client user - this is rather obvious, just wanted to list it > for completeness. > 2. Hadoop, AFAIK, does not support transactions, and no XA. I assume you > have no need for any of that stuff either. > 3. Your MDB could potentially log job start/end times, but that info is > available from Hadoop's monitoring infrastructure also. > > I would be very interested in hearing what senior members on the list have > to say... > > HTH > > Sanjeev > > On Wed, Feb 8, 2012 at 2:18 PM, Andy Doddington <a...@doddington.net> > wrote: > > > OK, I have a working Hadoop application that I would like to integrate > > into an application > > server environment. So, the question arises: can I do this? E.g. can I > > create a JobClient > > instance inside an EJB and run it in the normal way, or is something more > > complex > > required? In addition, are there any unpleasant interactions between the > > application > > server and the hadoop runtime? > > > > Thanks for any guidance. > > > > Andy D. > -- https://github.com/zinnia-phatak-dev/Nectar
