:JavaDocSearch never works

[isheff]

If, for instance, my cursor is on the p in System.out.println("Hello World"); in a basic demo file, and I run :JavaDocSearch, I get: No resulds for 'println'.

An analogous error appears for anything else in the standard libraries.

This is with Oracle JDK 10 on Ubuntu 18.04.

[TiBeN]

Same problem for me. This function works great with Maven dependencies javadocs but not core JDK classes.

Ubuntu 18.04.1 LTS, openjdk version "10.0.2", Eclim 2.8.0, Eclipse 4.8.0