ok, I'll check later.
I remember this issue is caused by java7 compiled class files.

On Tue, Apr 10, 2018 at 11:34 AM, Makoto Yui <m...@apache.org> wrote:

> Takeshi,
>
> I found that the following *warnings* are occurring in CI.
>
> Could you look into it though It's just a warning?
>
> https://travis-ci.org/apache/incubator-hivemall/jobs/363986771
>
> [WARN] Unable to instrument file
> /home/travis/build/apache/incubator-hivemall/spark/
> spark-2.3/target/generated-classes/cobertura/org/apache/
> spark/sql/catalyst/expressions/TopKHelper$ScoreWriter.class
> java.lang.UnsupportedClassVersionError:
> org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter :
> Unsupported major.minor version 52.0
> at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_151]
> at java.lang.ClassLoader.defineClass(ClassLoader.java:803) ~[na:1.7.0_151]
> at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> ~[na:1.7.0_151]
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
> ~[na:1.7.0_151]
> at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
> ~[na:1.7.0_151]
> at java.net.URLClassLoader$1.run(URLClassLoader.java:354) ~[na:1.7.0_151]
> at java.net.URLClassLoader$1.run(URLClassLoader.java:348) ~[na:1.7.0_151]
> at java.security.AccessController.doPrivileged(Native Method)
> ~[na:1.7.0_151]
> at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
> ~[na:1.7.0_151]
> at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[na:1.7.0_151]
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:312)
> ~[na:1.7.0_151]
> at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[na:1.7.0_151]
> at java.lang.Class.forName0(Native Method) ~[na:1.7.0_151]
> at java.lang.Class.forName(Class.java:278) ~[na:1.7.0_151]
> at org.objectweb.asm.ClassWriter.getCommonSuperClass(Unknown Source)
> ~[asm-5.0.1.jar:5.0.1]
> at
>
>
> --
> Makoto YUI <myui AT apache.org>
> Research Engineer, Treasure Data, Inc.
> http://myui.github.io/
>



-- 
---
Takeshi Yamamuro

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