Are there recommended conventions for adding additional code to a stock Hadoop install? It would be nice if we could piggyback on whatever mechanisms are used to distribute hadoop itself around the cluster. john
From: Vinod Kumar Vavilapalli [mailto:vino...@hortonworks.com] Sent: Thursday, August 22, 2013 6:25 PM To: user@hadoop.apache.org Subject: Re: yarn-site.xml and aux-services Auxiliary services are essentially administer-configured services. So, they have to be set up at install time - before NM is started. +Vinod On Thu, Aug 22, 2013 at 1:38 PM, John Lilley <john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>> wrote: Following up on this, how exactly does one *install* the jar(s) for auxiliary service? Can it be shipped out with the LocalResources of an AM? MapReduce's aux-service is presumably installed with Hadoop and is just sitting there in the right place, but if one wanted to make a whole new aux-service that belonged with an AM, how would one do it? John -----Original Message----- From: John Lilley [mailto:john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>] Sent: Wednesday, June 05, 2013 11:41 AM To: user@hadoop.apache.org<mailto:user@hadoop.apache.org> Subject: RE: yarn-site.xml and aux-services Wow, thanks. Is this documented anywhere other than the code? I hate to waste y'alls time on things that can be RTFMed. John -----Original Message----- From: Harsh J [mailto:ha...@cloudera.com<mailto:ha...@cloudera.com>] Sent: Wednesday, June 05, 2013 9:35 AM To: <user@hadoop.apache.org<mailto:user@hadoop.apache.org>> Subject: Re: yarn-site.xml and aux-services John, The format is ID and sub-config based: First, you define an ID as a service, like the string "foo". This is the ID the applications may lookup in their container responses map we discussed over another thread (around shuffle handler). <property> <name>yarn.nodemanager.aux-services</name> <value>foo</value> </property> Then you define an actual implementation class for that ID "foo", like so: <property> <name>yarn.nodemanager.aux-services.foo.class</name> <value>com.mypack.MyAuxServiceClassForFoo</value> </property> If you have multiple services foo and bar, then it would appear like the below (comma separated IDs and individual configs): <property> <name>yarn.nodemanager.aux-services</name> <value>foo,bar</value> </property> <property> <name>yarn.nodemanager.aux-services.foo.class</name> <value>com.mypack.MyAuxServiceClassForFoo</value> </property> <property> <name>yarn.nodemanager.aux-services.bar.class</name> <value>com.mypack.MyAuxServiceClassForBar</value> </property> On Wed, Jun 5, 2013 at 8:42 PM, John Lilley <john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>> wrote: > Good, I was hoping that would be the case. But what are the mechanics of it? > Do I just add another entry? And what exactly is "madreduce.shuffle"? A > scoped class name? Or a key string into some map elsewhere? > > e.g. like: > > <property> > <name>yarn.nodemanager.aux-services</name> > <value>mapreduce.shuffle</value> > </property> > <property> > <name>yarn.nodemanager.aux-services</name> > <value>myauxserviceclassname</value> > </property> > > Concerning auxiliary services -- do they communicate with NodeManager via > RPC? Is there an interface to implement? How are they opened and closed > with NodeManager? > > Thanks > John > > -----Original Message----- > From: Harsh J [mailto:ha...@cloudera.com<mailto:ha...@cloudera.com>] > Sent: Tuesday, June 04, 2013 11:58 PM > To: <user@hadoop.apache.org<mailto:user@hadoop.apache.org>> > Subject: Re: yarn-site.xml and aux-services > > Yes, thats what this is for. You can implement, pass in and use your own > AuxService. It needs to be on the NodeManager CLASSPATH to run (and NM has to > be restarted to apply). > > On Wed, Jun 5, 2013 at 4:00 AM, John Lilley > <john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>> wrote: >> I notice the yarn-site.xml >> >> >> >> <property> >> >> <name>yarn.nodemanager.aux-services</name> >> >> <value>mapreduce.shuffle</value> >> >> <description>shuffle service that needs to be set for Map Reduce >> to run </description> >> >> </property> >> >> >> >> Is this a general-purpose hook? >> >> Can I tell yarn to run *my* per-node service? >> >> Is there some other way (within the recommended Hadoop framework) to >> run a per-node service that exists during the lifetime of the NodeManager? >> >> >> >> John Lilley >> >> Chief Architect, RedPoint Global Inc. >> >> 1515 Walnut Street | Suite 200 | Boulder, CO 80302 >> >> T: +1 303 541 1516<tel:%2B1%20303%20541%201516> | M: +1 720 938 >> 5761<tel:%2B1%20720%20938%205761> | F: +1 >> 781-705-2077<tel:%2B1%20781-705-2077> >> >> Skype: jlilley.redpoint | >> john.lil...@redpoint.net<mailto:john.lil...@redpoint.net> | >> www.redpoint.net<http://www.redpoint.net> >> >> > > > > -- > Harsh J -- Harsh J -- +Vinod Hortonworks Inc. http://hortonworks.com/ CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. 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