"If in doubt, throw it out" applies extra to canned goods. Granted, if they were still fresh out of the cooker and haven't sat around at all then eat up.
If this happened a day or more ago, then dogs, chickens or
compost to be safe.
I've lost a little water before, assumed it was just absorbing into the items being canned. But half a jar is a lot. Likely steamed its way out of loose lids and shouldn't be stored for later use.