Gaël Renoux created FLINK-12462:
-----------------------------------
Summary: Classloading fails in 1.8.0 when Scalatest is loaded first
Key: FLINK-12462
URL: https://issues.apache.org/jira/browse/FLINK-12462
Project: Flink
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Gaël Renoux
When using Flink 1.8.0 and Scala 2.11.12, if Scalatest is loaded first and I
use some class from the Scala library, I get a:
java.lang.ClassNotFoundException: scala.reflect.io.JavaToolsPlatformArchive
To reproduce:
- start with the Scala Maven archetype
(org.apache.flink:flink-quickstart-scala:1.8.0)
- in the POM, add a Scalatest dependency with test scope, before the Flink
dependencies (org.scalatest:scalatest_${scala.binary.version}:3.0.4:test)
- in StreamingJob, add: env.fromElements[List[String]]()
I got a similar issue using Scala 2.12.7: java.lang.ClassNotFoundException:
scala.reflect.internal.SymbolTable$ReflectStats
It works when changing the Flink version to 1.7.2. It also works if Flink is
loaded first, but this can be a bit harder to ensure sometimes (our own POM has
a few profile definitions).
I also managed to make it work by forcing the following dependency:
org.scala-lang:scala-reflect:${scala.version}. Looking at the dependency tree,
it looks like Flink needs the most recent version of scala-reflect but somehow
doesn't enforce it. When Scalatest is loaded first, the version it declares
(wich is slightly older: 2.11.11 or 2.12.3) gets used instead.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
