[Bug] if dynamicConfig item in zk do not exist in broker, will fail for other dynamic config

[leizhiyuan]

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• I searched in the issues and found nothing similar.

Version

master

Minimal reproduce step

we upgrade broker ,add a new dynamic config,then we have a,b,c in zk config

then we rollback broker, only a ,c exist in broker code,

Field configField = dynamicConfigurationMap.get(configKey).field;

dynamicConfigurationMap.get(configKey) will be null

What did you expect to see?

if dynamic config is null ,skip it

What did you see instead?

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!