Thank you for your post.
It looks like the Tested and Recommended version is JRE 1.8.0_31 per Knowledge Base Article #13465. However, newer versions of Java 8 should work as well with FileMaker Server 14.0.1 or newer. Is this fmadmin crash persistent or has it been a one time issue?
I hope this information is of use!
This was a one time issue. I generally try to never open the fms admin console while the server is actually being used, as the console itself seems to be a bit java hungry in general. It was enough of a concern though to make me think twice to ever open the console during normal business hours.
Seems kind of silly to have an almost server crashing issue caused by an admin console. Never had that happen with MYSQL.
Since it was java that had the issue, I first thought it was a java version thing.
I am using JRE 8.60 without issues.
I did have issues with the FMS14 JRE installer. It kept hanging and would not install JRE. Had to force quit the FMS installer and update JRE manually then run the FMS14 installer.