RFR: 8244508: JFR: FlightRecorderOptions reset date format

[Markus Gronlund]

Looks good Erik, thanks for fixing.

Thank you Ben for reporting this issue.

Markus

-----Original Message-----
From: Erik Gahlin 
Sent: den 7 maj 2020 17:39
To: hotspot-jfr-dev <hotspot-jfr-dev at openjdk.java.net>
Cc: bbrandl.atoss at gmail.com
Subject: RFR: 8244508: JFR: FlightRecorderOptions reset date format

Hi,

Could I have review of a date formatting problem when using -XX:FlightRecorderOption.

To prevent DCmdConfigure to load classes related to date formatting early during startup a verbose flag is added. This has an additional benefit of reducing the startup time since native code only looks at the result if jcmd is used.

Long term solution may be to move functionality into native, but this is small and safe fix that can easily be backported.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8244508

Webrev:
http://cr.openjdk.java.net/~egahlin/8244508/

Testing: jdk/jdk/jfr

Thanks
Erik