sentinel-apache-dubbo-adapter Entry leak cause full GC

[ecyuan]

sentinel-apache-dubbo-adapter-1.7 cause full gc.

When dubbo request grow, full gc regularly.

Reason:
https://github.com/alibaba/Sentinel/blob/release-1.7/sentinel-adapter/sentinel-apache-dubbo-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/dubbo/SentinelDubboConsumerFilter.java#L68

https://github.com/alibaba/Sentinel/blob/release-1.7/sentinel-adapter/sentinel-apache-dubbo-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/dubbo/SentinelDubboProviderFilter.java#L70

Provider and Consumer use the same key to store CtEntry.
A = client
B = server dubbo provider
C = server dubbo provider
For example: A --> call B (call C)

When onResponse
https://github.com/alibaba/Sentinel/blob/release-1.7/sentinel-adapter/sentinel-apache-dubbo-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/dubbo/BaseSentinelDubboFilter.java#L65

C remove DubboUtils.DUBBO_INTERFACE_ENTRY_KEY first, then B can't find the key, so CtEntry object create by SentinelDubboProviderFilter escape. so heap will grow.

[sczyh30]

Thanks for reporting! It's indeed a bug. Would you like to contribute a PR to fix it? You may refer to the contribution guidelines.

[linlinisme]

Assign to me, I know this guy @sczyh30