Build failed: "method does not override or implement a method from a supertype"

[k-jiang]

Build failed with ./gradlew build
branch: 1.12.2

/some/path/DynmapForge/build/sources/main/java/org/dynmap/forge/DynmapPlugin.java:1235: error: method does not override or implement a method from a supertype
        @Override
        ^
/some/path/DynmapForge/build/sources/main/java/org/dynmap/forge/DynmapPlugin.java:1239: error: method does not override or implement a method from a supertype
        @Override
        ^
Note: /some/path/DynmapForge/build/sources/main/java/org/dynmap/forge/DynmapPlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2 errors
:compileJava FAILED

FAILURE: Build failed with an exception.

A dependency problem?

[k-jiang]

It is a dependency problem.
Temporary fix: manually pull and mvn install webbukkit/DynmapCore once, then ./gradlew build the DynmapForge.

[mikeprimm]

Every build of Dynmap (for Forge, Spigot, or otherwise) depends upon having a matching DynmapCore build - always update and build both.