[GitHub] [dubbo] tangcent opened pull request #6028: [Dubbo-6027] Fix ConcurrentModificationException in ShutdownHookCallbacks#callback

["tangcent (GitHub)" <gi...@apache.org>]

## What is the purpose of the change

- Polish ShutdownHookCallbacks to fix ConcurrentModificationException in `ShutdownHookCallbacks#callback`

## Brief changelog

- return `unmodifiableList` in `getCallbacks `
- use `addCallbacks ` instead of `foreach(::addCallback)`

## Verifying this change

- run test case `ShutdownHookCallbacksTest:: testConcurrenceCallback`

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[ Full content available at: https://github.com/apache/dubbo/pull/6028 ]
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[GitHub] [dubbo] chickenlj closed pull request #6028: [Dubbo-6027] Fix ConcurrentModificationException in ShutdownHookCallbacks#callback

["chickenlj (GitHub)" <gi...@apache.org>]

[ pull request closed by chickenlj ]

[ Full content available at: https://github.com/apache/dubbo/pull/6028 ]
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[GitHub] [dubbo] chickenlj commented on issue #6028: [Dubbo-6027] Fix ConcurrentModificationException in ShutdownHookCallbacks#callback

["chickenlj (GitHub)" <gi...@apache.org>]

I think the root cause is the modification of REGISTRIES in AbstractRegistryFactory

[ Full content available at: https://github.com/apache/dubbo/pull/6028 ]
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