Hi. There is some problems using Guava’s check method in Scala. (https://groups.google.com/forum/#!topic/guava-discuss/juwovq26R3k <https://groups.google.com/forum/#!topic/guava-discuss/juwovq26R3k>) You can solve this error simply with casting last argument to java.lang.Object. But I think we’d better use `require`, `assume`, `assert` method provided by Scala. (http://daily-scala.blogspot.kr/2010/03/assert-require-assume.html <http://daily-scala.blogspot.kr/2010/03/assert-require-assume.html>) Because this changes affects many other codes, so we should discuss about changing Guava's method to Scala’s method.
Regards. Chiwan Park (Sent with iPhone) > On May 10, 2015, at 11:49 AM, Lokesh Rajaram <rajaram.lok...@gmail.com> wrote: > > Hello All, > > I am new to Flink community and am very excited about the project and work > you all have been doing. Kudos!! > > I was looking to pickup some starter task. Robert recommended to pick up > https://issues.apache.org/jira/browse/FLINK-1711. Thanks Robert for your > guidance. > > Sorry for a dumb question. I am done with code changes but my "mvn verify" > failing only for the scala module as follows > > flink/flink-scala/src/main/scala/org/apache/flink/api/scala/joinDataSet.scala:77: > error: ambiguous reference to overloaded definition, > [ERROR] both method checkNotNull in object Preconditions of type [T](x$1: > T, x$2: String, x$3: <repeated...>[Object])T > [ERROR] and method checkNotNull in object Preconditions of type [T](x$1: > T, x$2: Any)T > [ERROR] match argument types ((L, R) => O,String) > [ERROR] Preconditions.checkNotNull(fun, "Join function must not be > null.") > > Same error I see for all of the Scala classes I changed. Any pointers here > will be very helpful for me to proceed further. Please let me know if you > need more information. > > Thanks in advance for your help and support. > > Thanks, > Lokesh
