[Bug] server memory leak with netty

[zuston]

Code of Conduct

• I agree to follow this project's Code of Conduct

Search before asking

• I have searched in the issues and found no similar issues.

Describe the bug

Affects Version(s)

master

Uniffle Server Log Output

No response

Uniffle Engine Log Output

No response

Uniffle Server Configurations

rss.rpc.server.type            GRPC_NETTY
rss.server.netty.port          21100

Uniffle Engine Configurations

spark.rss.client.type         GRPC_NETTY

Additional context

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

[zuston]

PTAL @leixm