JDK 8 Instrumentation API致JVM崩溃，Red Hat OpenJDK提交Bug遇阻求助

Hey there, sorry to hear you're stuck with this frustrating JVM crash when using the Instrumentation API on Red Hat OpenJDK 8—and that you hit a wall submitting the bug to Red Hat. Let's walk through some actionable steps to tackle both issues.

Fixing the Bug Submission Roadblock #

If the official Red Hat website submission didn't go through, try these alternative channels to get your issue in front of their team:

• Red Hat Customer Portal: If you have an active subscription, log in and file a support case directly. This is the fastest way to get official, prioritized help for Red Hat software.
• Red Hat's OpenJDK GitHub Repos: Red Hat hosts public repositories for their OpenJDK builds. You can file an issue in the relevant repo, just make sure to include all your reproducible details and crash logs.
• Community Mailing Lists: The Red Hat OpenJDK community runs dedicated mailing lists. Post your issue there, describe your reproducible project's key code and steps, and ask for guidance from maintainers and other developers who might have run into similar problems.

Diagnosing the Instrumentation Crash #

To figure out what's causing the crash and make your bug report as strong as possible, here's what to do next:

1. Grab the Crash Log: When the JVM crashes, it spits out a hs_err_pid<number>.log file in your working directory. This file has critical info like the crash stack trace, JVM settings, and memory state—include the full log in any bug report or community post; it's non-negotiable for debugging.
2. Test Other OpenJDK Builds: Run your reproducible project against another OpenJDK 8 distribution (like Eclipse Temurin) to see if the crash happens there too. This will tell you if the issue is specific to Red Hat's build or a broader OpenJDK 8 problem.
3. Narrow Down the Trigger: Trim your demo project to the absolute minimum that still causes the crash. Ask yourself:
   • Is it a specific ClassFileTransformer that's breaking things?
   • Does the crash happen when redefining a certain type of class?
   • Does changing the order of your Instrumentation calls affect whether it crashes?
4. Search for Known Issues: Check Red Hat's bug database and community forums first—someone might have already reported this, found a workaround, or even fixed it.

Pro Tips for a Killer Bug Report #

When you submit the bug, make sure to include:

• The exact output of java -version for your Red Hat OpenJDK 8 installation
• Step-by-step instructions to reproduce the crash
• A clear description of your minimal reproducible project (key classes, methods, and how you're using the Instrumentation API)
• The full content of the hs_err_pid log
• Your findings from testing against other OpenJDK distributions

内容的提问来源于stack exchange，提问作者Yevhen Bulatnikov