bbrowning commented on issue #2855: Cache database attachments
   I've observed some very poor performance for Java actions and with the help 
of @rabbah I think I've narrowed it down to the Invokers fetching the Jar 
attachment on every activation. So, I can confirm both that not caching 
database attachments is a problem and that this PR is needed.
   However, I've as of yet been unable to verify that this PR works as 
 is a gist of me invoking an action twice in a row with this PR applied. You'll 
notice that on the highlighted line, the 2nd invocation still fetches the 
attachment directly from the database.
   There are also a couple of test failures with the PR when applied to the 
current codebase. Those look to be related to the reduction of Info level 
logging and some of the log markers the tests are expecting no longer get 
logged. Here's the failing test output for reference -

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