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From Flavio Pompermaier <pomperma...@okkam.it>
Subject Re: Flink cluster and Java 8
Date Wed, 03 Feb 2016 14:40:00 GMT
I've fixed it changing the copy method in the *TupleSerializer* as follow:

@Override
public T copy(T from, T reuse) {
for (int i = 0; i < arity; i++) {
Object copy = fieldSerializers[i].copy(from.getField(i));
reuse.setField(copy, i);
}
return reuse;
}

And commenting line 50 in *CollectionExecutionAccumulatorsTest*:

assertEquals(NUM_ELEMENTS, result.getAccumulatorResult(ACCUMULATOR_NAME));

I hope it helps..

On Wed, Feb 3, 2016 at 3:12 PM, Flavio Pompermaier <pompermaier@okkam.it>
wrote:

> I've checked the compiled classes with javap -verbose and indeed they had
> a major.verion=51 (java 7).
> So I've changed the source and target to 1.8 in the main pom.xm and now
> the generated .class have major.verion=52.
> Unfortunately now I get this error:
>
> [ERROR]
> /opt/flink-src/flink-java/src/main/java/org/apache/flink/api/java/typeutils/runtime/TupleSerializer.java:[104,63]
> incompatible types: void cannot be converted to java.lang.Object
>
> How can I fix it? I also tried to upgrade the maven compiler to 3.5 but it
> didn't help :(
>
> Best,
> Flavio
>
> On Wed, Feb 3, 2016 at 2:38 PM, Flavio Pompermaier <pompermaier@okkam.it>
> wrote:
>
>> Hi to all,
>>
>> I was trying to make my Java 8 application to run on a Flink 0.10.1
>> cluster.
>> I've compiled both Flink sources and my app with the same Java version
>> (1.8.72) and I've set the env.java.home to point to my java 8 JVM in every
>> flink-conf.yml of the cluster.
>>
>> I always get the following Exception:
>>
>> java.lang.UnsupportedClassVersionError: XXX: Unsupported major.minor
>> version 52.0
>>
>> Is there any other setting I forgot to check? Do I have to change also
>> the source and target to 1.8 in the maven compiler settings of the main pom?
>>
>> Best,
>> Flavio
>>
>
>
>

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