Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/22081#discussion_r209707448
--- Diff: pom.xml ---
@@ -984,24 +987,15 @@
</exclusion>
</exclusions>
</dependency>
- <!-- See SPARK-1556 for info on this dependency: -->
+ <!-- See SPARK-23654 for info on this dependency;
+ It is used to keep javax.activation at v1.1.1 after dropping
+ jets3t as a dependency.
+ -->
<dependency>
- <groupId>net.java.dev.jets3t</groupId>
- <artifactId>jets3t</artifactId>
- <version>${jets3t.version}</version>
+ <groupId>javax.activation</groupId>
+ <artifactId>activation</artifactId>
+ <version>1.1.1</version>
--- End diff --
the reason for the activation is that it still comes in from somewhere and
the version pulled in drops from 1.1.1 to 1.1; meaning it'd be an accidental
downgrade of a JAR. I don't know exactly what uses javax.activation: it is one
of those historical artifacts whose main role, mapping mime types, is
potentially used somewhere important.
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