https://bz.apache.org/bugzilla/show_bug.cgi?id=63487
--- Comment #3 from Trevin Beattie <trevin.beat...@gigsternetwork.com> ---
Following up: I got a list of the jars included in our gradle build, and found
that there were indeed conflicting implementations of HttpSessionListener:
* tomcat-embed-core-9.0.17.jar
* javax.servlet-api-3.1.0.jar
Apache’s interface declares default methods, while Oracle’s interface does not.
I found the library that was pulling in javax.servlet-api as a dependency and
figured out how to exclude it:
compile("com.sparkjava:spark-core:2.7.2") {
exclude group: "javax.servlet", module: "javax.servlet-api"
}
That cleared up the errors.
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