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From Aljoscha Krettek <aljos...@apache.org>
Subject Re: Janino related question
Date Mon, 09 May 2016 10:15:24 GMT
Hi Gábor,
I used it, yes, but I never encountered such a problem. Let's hope that the
error message Márton discovered helps. :-)

Cheers,
Aljoscha

On Mon, 9 May 2016 at 11:38 Márton Balassi <balassi.marton@gmail.com> wrote:

> 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.hun@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
> >
>

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