Proposal for back-porting JFR to OpenJDK8u

Andrew Haley aph at
Mon Dec 10 18:35:26 UTC 2018

On 12/10/18 4:54 PM, Hohensee, Paul wrote:

> Having got that out of the way, how should we proceed with
> starting work? Maybe one of the Alibaba folks can post a
> webrev?

It'd be a start.

We need to be very careful about how we plan this. To begin with,
we need to get our processes, especially testing processes, up to
speed. We're going to have to work together as a community to
make sure that we have a good test regime working and some
experience under our belts before we can even think about pushing
JFR to mainline jdk8u.

Also, let's keep in mind that we might decide that JFR is too
much of a risk to go into stable jdk8u at all.

I'm thinking that this would be a good candidate for a tech
preview. We do this a fair bit at Red Hat, and it works well. We
could get AdoptOpenJDK to host some candidate binaries: I expect
they'd be willing.

In the meantime, we should start reviewing and testing smaller
and simpler patches for bug fixes. I believe there are some good
ones from Amazon.

Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <>
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671

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