Hello Sandy, Thank you for your explanation. Then I would at least expect that to be consistent across local, yarn-client, and yarn-cluster modes. (And not lead to the case where it somehow works in two of them, and not for the third).
Kind regards, Emre Sevinç http://www.bigindustries.be/ On Tue, Mar 24, 2015 at 4:38 PM, Sandy Ryza <sandy.r...@cloudera.com> wrote: > Ah, yes, I believe this is because only properties prefixed with "spark" > get passed on. The purpose of the "--conf" option is to allow passing > Spark properties to the SparkConf, not to add general key-value pairs to > the JVM system properties. > > -Sandy > > On Tue, Mar 24, 2015 at 4:25 AM, Emre Sevinc <emre.sev...@gmail.com> > wrote: > >> Hello Sandy, >> >> Your suggestion does not work when I try it locally: >> >> When I pass >> >> --conf "key=someValue" >> >> and then try to retrieve it like: >> >> SparkConf sparkConf = new SparkConf(); >> logger.info("* * * key ~~~> {}", sparkConf.get("key")); >> >> I get >> >> Exception in thread "main" java.util.NoSuchElementException: key >> >> And I think that's expected because the key is an arbitrary one, not >> necessarily a Spark configuration element. This is why I was passing it via >> --conf and retrieving System.getProperty("key") (which worked locally and >> in yarn-client mode but not in yarn-cluster mode). I'm surprised why I >> can't use it on the cluster while I can use it while local development and >> testing. >> >> Kind regards, >> >> Emre Sevinç >> http://www.bigindustries.be/ >> >> >> >> On Mon, Mar 23, 2015 at 6:15 PM, Sandy Ryza <sandy.r...@cloudera.com> >> wrote: >> >>> Hi Emre, >>> >>> The --conf property is meant to work with yarn-cluster mode. >>> System.getProperty("key") isn't guaranteed, but new SparkConf().get("key") >>> should. Does it not? >>> >>> -Sandy >>> >>> On Mon, Mar 23, 2015 at 8:39 AM, Emre Sevinc <emre.sev...@gmail.com> >>> wrote: >>> >>>> Hello, >>>> >>>> According to Spark Documentation at >>>> https://spark.apache.org/docs/1.2.1/submitting-applications.html : >>>> >>>> --conf: Arbitrary Spark configuration property in key=value format. >>>> For values that contain spaces wrap “key=value” in quotes (as shown). >>>> >>>> And indeed, when I use that parameter, in my Spark program I can >>>> retrieve the value of the key by using: >>>> >>>> System.getProperty("key"); >>>> >>>> This works when I test my program locally, and also in yarn-client >>>> mode, I can log the value of the key and see that it matches what I wrote >>>> in the command line, but it returns *null* when I submit the very same >>>> program in *yarn-cluster* mode. >>>> >>>> Why can't I retrieve the value of key given as --conf "key=value" when >>>> I submit my Spark application in *yarn-cluster* mode? >>>> >>>> Any ideas and/or workarounds? >>>> >>>> >>>> -- >>>> Emre Sevinç >>>> http://www.bigindustries.be/ >>>> >>>> >>> >> >> >> -- >> Emre Sevinc >> > > -- Emre Sevinc
