As a quickfix I implmeented ResultTypeQueryable for the TypeSerializerInputFormat. A PR for the 0.8 branch can be found here
https://github.com/apache/flink/pull/349 Please check and let me know if there is a way to fix the problem without breaking the 0.8 line API. 2015-01-29 14:54 GMT+01:00 Alexander Alexandrov < alexander.s.alexand...@gmail.com>: > The problem seems to be that the reflection analysis cannot determine the > type of the TypeSerializerInputFormat. > > One possible solution is to add the ResultTypeQueryable interface and > force clients to explicitly set the TypeInformation. > > This might break code which relies on automatic type inference, but at the > moment I cannot find any other usages of the TypeSerializerInputFormat > except from the unit test. > > > > ---------- Forwarded message ---------- > From: Alexander Alexandrov <alexander.s.alexand...@gmail.com> > Date: 2015-01-29 12:04 GMT+01:00 > Subject: TypeSerializerInputFormat cannot determine its type automatically > To: u...@flink.apache.org > > > I am trying to use the TypeSerializer IO formats to write temp data to > disk. A gist with a minimal example can be found here: > > https://gist.github.com/aalexandrov/90bf21f66bf604676f37 > > However, with the current setting I get the following error with the > TypeSerializerInputFormat: > > Exception in thread "main" > org.apache.flink.api.common.InvalidProgramException: The type returned by > the input format could not be automatically determined. Please specify the > TypeInformation of the produced type explicitly. > at > org.apache.flink.api.java.ExecutionEnvironment.readFile(ExecutionEnvironment.java:341) > at SerializedFormatExample$.main(SerializedFormatExample.scala:48) > at SerializedFormatExample.main(SerializedFormatExample.scala) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134) > > I think that the typeInformation instance at line 43 should be somehow > passed to the TypeSerializerInputFormat, but I cannot find a way to do it. > > Any suggestions? > > Thanks, > A. > >
