[jdk21] RFR: 8309959: JFR: Display N/A for missing data amount

[Erik Gahlin]

On Thu, 22 Jun 2023 14:10:33 GMT, Frederic Thevenet <fthevenet at openjdk.org> wrote:

> Hi!
> 
> This pull request contains a backport of commit [9872a141](https://github.com/openjdk/jdk/commit/9872a14192ce3964b934c19ab685342ffd396986) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Erik Gahlin on 14 Jun 2023 and was reviewed by Markus Grönlund and Thomas Stuefe.
> 
> This is a follow-up to [JDK-8309550](https://github.com/openjdk/jdk17u-dev/pull/1438) which was integrated *before* RDP1, so backporting this one also as a matter of consistency.
> 
> Thanks!

Marked as reviewed by egahlin (Reviewer).

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PR Review: https://git.openjdk.org/jdk21/pull/56#pullrequestreview-1493408204