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 <pomperma...@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 >
