RFR: 8265683: vmTestbase/nsk/jdb tests failed with "JDWP exit error AGENT_ERROR_INTERNAL(181)"

[Alex Menkov]

On Thu, 22 Apr 2021 15:59:09 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> This bug was introduced by my recent changes for [JDK-8265028](https://bugs.openjdk.java.net/browse/JDK-8265028), which attempted to speed up ThreadNode lookups by not looking in the runningThreads list if the TLS lookup failed. At the time it was thought that the thread could not possibly be on the list, but it turns out sometimes it can.
> 
> For now I'm just doing a quick fix to replace the assert being triggered with a lookup instead, which is pretty much how it worked before JDK-8265028. However, I eventually want to get back to not having to do the lookup, but first I need to better understand why this is happening in the first place, and the tests are failing too often to wait for that, thus the quick fix.

Marked as reviewed by amenkov (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/3634