Hi Gabor, I have checked out your branch and tried debugging WordCountPojo to reproduce the behaviour. I am on a Mac with jdk1.8.0_91. I have received the following error when trying to access the constructors of the class in question:
Exception in thread "main" java.lang.VerifyError: (class: org/apache/flink/api/java/typeutils/runtime/generated/Word_GeneratedSerializer, method: deserialize signature: (Lorg/apache/flink/core/memory/DataInputView;)Lorg/apache/flink/examples/java/wordcount/WordCountPojo$Word;) Register 3 contains wrong type at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) at java.lang.Class.getConstructors(Class.java:1651) at org.apache.flink.api.java.typeutils.runtime.PojoSerializerGenerator.createSerializer(PojoSerializerGenerator.java:57) at org.apache.flink.api.java.typeutils.PojoTypeInfo.createSerializer(PojoTypeInfo.java:306) at org.apache.flink.api.java.DataSet.collect(DataSet.java:407) at org.apache.flink.api.java.DataSet.print(DataSet.java:1605) at org.apache.flink.examples.java.wordcount.WordCountPojo.main(WordCountPojo.java:119) Disconnected from the target VM, address: '127.0.0.1:52140', transport: 'socket' I hope this helps. Marton On Sun, May 8, 2016 at 2:59 PM, Gábor Horváth <xazax....@gmail.com> wrote: > Hi! > > I have created a proof of concept implementation of my GSoC project [1]: > introducing code generation to the serializers. The code is available here > [2]. Unfortunately I have run into a problem that I am unable to debug. I > generated some code that I compiled using the Janino compiler [4]. I did > not get any exception during the compilation, and I was able to get the > Class from the compiler. Unfortunately I am unable to get the list of the > constructors from the Class and can not debug what is the source of the > problem. There are no exceptions thrown, no errors displayed in the event > log, no fatal error logfile generated by the JVM, but the process > terminates (at line [3]). I suspect that the Class generated by the Janino > compiler is invalid, but it does not emit any exceptions or warnings. I am > using Oracle JDK 8, on Arch Linux. Have you seen any similar problem? Is > there a way to debug a situation like this? Is there a way to get extra > diagnostics from the Janino compiler? > > @aljoscha: you have some experience with the Janino compiler, what do you > think? > > Thanks in advance, > Gábor > > [1] https://issues.apache.org/jira/browse/FLINK-3599 > [2] https://github.com/Xazax-hun/flink/commits/serializer_codegen > [3] > > https://github.com/Xazax-hun/flink/commit/af499d5bebe5c1dba6b970977852318346636a8f#diff-7a2080515bac95cec58032655867d6cfR57 > [4] http://unkrig.de/w/Janino >
