DropwizardExports throws NPE if gauge's value is null

[DmitryLipiev]

What did you do?

Tried to export Dropwizard metrics

What did you expect to see?

A list of Prometheus metrics in my browser

What did you see instead? Under which circumstances?

Internal server error. Some of our gauge metrics are initialized to null, when DropwizardExports comes across them it throws NPE at line 54:
LOGGER.log(Level.FINE, String.format("Invalid type for Gauge %s: %s", name, obj.getClass().getName()));

Environment

Ubuntu 16.04, Java8

• System information:

Linux 4.4.0-96-generic x86_64

[brian-brazil]

This is the wrong repository, could you file this in client_java?

[DmitryLipiev]

Yes, filed prometheus/client_java#301

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.