@cstamas thanks for pointing this out.  Is this still relevant, or does Jetty provide proper logging now?  If you think org.sonatype.sisu.jetty.thread.InstrumentedQueuedThreadPool should be used instead, which is fine, then we can make a custom impl which captures metrics and does this strange thread wizardry.

BTW org.sonatype.sisu.jetty.thread.InstrumentedQueuedThreadPool ASIS does not really instrument anything, it just appears to use a thread factory and install a background thread... yes?

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Also, some of the stock metrics integration classes have some minor issues which make them hard to re-use (like the httpclient bits).  We may want to fix these upstream and not need to hack around them here.