I’m bumping the dependencies I have on an old test harness to the latest versions. One of these dependencies is jersey-client which I’ve bumped to 3.1.6, which at the time of writing this is the last released version.

When I run the code I get the following warning:

org.glassfish.jersey.client.innate.inject.NonInjectionManager <init>
WARNING: Falling back to injection-less client.

Clearly jersey is trying to tell me something it considers important, but it’s not obvious what the problem is or what I should do about it. I’ve tried searching the warning message for some documentation on the issue; one search engine only drew up 6 hits (none of which where helpful), another failed to find any hits at all.

Apart from flooding the logs with unwanted messages, my application appears to be working so there is no immediate problem. All the same, I’d still like to know what the problem is as it’s almost always a bad idea to ignore warning messages.

Does anybody know?