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Alternatively you can restart eclipse (joke) or just press the tiny reload button on the eclipse-cs section in Workspace preferences.
where is this "eclipse-cs section" and the "Workspace preferences"? sorry for asking dumb questions :)
It's probably just me being overly cryptic ;-)
reloading the suppression file content always has been a pain in the a** for me. now it's even worse as i want to configure eclipse-cs via maven by using the m2e-code-quality plugin, now reloading suppressions does not work at all! have to re-checkout to get rid of some cached (?!) configs :(
Sorry for the late reply. I can not figure why a re-checkout would be necessary, since the plugins caching is only in memory at this point.
If you're still experiencing this issue (and have not yet given up on using Checkstyle) can you please elaborate your project setup?
Checkstyle config file
would be helpful to analyze this.
On a sidenote I found it exceedingly more practical to make use of the SuppressWarningsFilter, which can use the standard @SuppressWarnings annotations to suppress checkstyle messages (see http://checkstyle.sourceforge.net/config.html#SuppressWarningsFilter).
In any case it might also be an issue of your configuration being overly strict when lots of legitimate suppressions are being needed.