Thoughts on possible options to JDK-8027598

[Rajan Halade]

I am working towards fixing JDK-8027598 
<https://bugs.openjdk.java.net/browse/JDK-8027598>, there are multiple 
options available here and would appreciate your thoughts on this. It 
was filed to address the issue at large reported inJDK-8027526 
<https://bugs.openjdk.java.net/browse/JDK-8027526>.

Problem - When a regression test is run in agentvm mode and alters 
security providers, it can cause adverse effects on next tests executed 
in the batch. We have been batteling with few intermittent failures 
which are caused by scenario like this so I think it is important to 
have this fix.

Possible approaches -
1. Enhance JTREG - This option would require change in jtreg to 
store/restore security providers when run in agentvm mode.
2. Update impacting tests to run in othervm - simple change but may slow 
down batch execution slightly.
3. Update each test to use library 
java/security/KeyPairGenerator/Failover.java like done in 
java/security/Provider tests - another easy change and tests would 
continue to run agentvm but would have added overhead of restoring 
providers.

We will continue to pursue option 1 but many not be possible. Option 2 & 
3 above are equally good and are debatable so would like your thoughts 
on it.

Thanks,
Rajan


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