Troubleshooting

Healthchecks

I am seeing Optional[xxx] inside of my healthchecks

Mustache dependency resolution issue

Problem

The beadledom-health module has a dependency on com.github.spullara.mustache.java:compiler:0.9.0. Some older versions of com.github.spullara.mustache.java:compiler do not have support for Java 8 which beadledom health needs. Not having Java 8 support would result in Optional fields not being unwrapped properly.

Suggested solution

Add an explicit dependency on version 0.9.0 of the com.github.spullara.mustache.java:compiler dependency

Build Exceptions

I am seeing scala.collection.immutable.$colon$colon.hd$1()Ljava/lang/Object; a part of my exceptions

Scala version collision issue

Problem

What this usually telling you is that you have a scala version mismatch (Scala classes from 2.10 and 2.11 or 2.11 and 2.12 etc.). The best way we have found to resolve these inconsistencies is to do mvn dependency:tree -Dincludes:scala-library:: and search the output for anything containing the unwanted version of Scala. For instance scalatest_2.10 if you were using Scala 2.11.