Github user eshioji commented on the pull request:
https://github.com/apache/storm/pull/597#issuecomment-120603640
If the thread is used in `ThreadPoolExecutor` (like the boss & worker
thread pool currently used), `UncaughtExceptionHandler` are not invoked because
`ThreadPoolExecutor` suppress uncaught exceptions coming from tasks (see e.g.
http://stackoverflow.com/questions/1838923/why-is-uncaughtexceptionhandler-not-called-by-executorservice).
There are workarounds but they are quite hacky.
Maybe it makes more sense to consider the service unhealthy if messages are
unable to be dispatched, rather than based on whether an uncaught exception was
encountered?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
