Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/10782#discussion_r49939469
--- Diff: network/yarn/pom.xml ---
@@ -86,6 +88,15 @@
</excludes>
</filter>
</filters>
+ <relocations>
--- End diff --
I'm now thinking all the dependencies should be relocated, with the
exception of the jni leveldb stuff ânot the thing you can shade; not the
thing you can isolate in a classloader hierarchy instead.
What I can do there is add a profile, `leveldb-provided` which excludes
leveldb in this situation. That's important as leveldb does creep onto the
classpath from elsewhere âand while the version in Hadoop currently matches
that in this JAR, there's no guarantee of that continuing to hold.
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