RFR: JDK-8225013: sanity/client/SwingSet/src/ScrollPaneDemoTest.java fails on Linux

[Phil Race]

On Mon, 23 May 2022 16:25:37 GMT, Alexandre Iline <shurailine at openjdk.org> wrote:

> Before the fix the test was failing around 1 time in fifty runs. After the fix the test did not fail in ~ 1k runs.
> Additional instrumentation is added to save useful information on the UI state, should the failure happen again.

I don't know anything about Jemmy, so I have no idea what these changes do.
Importantly I can't tell what you've done which makes the test stable and why.
Can you explain both the problem and the solution ?

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PR: https://git.openjdk.java.net/jdk/pull/8848