Dubbo ProviderConsumerRegTable class cause OutOfMemoryException

[qixiaobo]

fix #8515

[codecov-commenter]

Codecov Report

Merging #8522 (dc8dd2d) into 2.6.x (86b5e00) will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##              2.6.x    #8522      +/-   ##
============================================
- Coverage     47.08%   47.07%   -0.02%     
  Complexity     4475     4475              
============================================
  Files           577      577              
  Lines         25626    25631       +5     
  Branches       4545     4546       +1     
============================================
- Hits          12067    12065       -2     
- Misses        11700    11709       +9     
+ Partials       1859     1857       -2     

Impacted Files	Coverage Δ
...java/com/alibaba/dubbo/config/ReferenceConfig.java	53.35% <66.66%> (+0.47%)	⬆️
...aba/dubbo/remoting/transport/mina/MinaChannel.java	42.25% <0.00%> (-11.27%)	⬇️
...dubbo/rpc/protocol/dubbo/CallbackServiceCodec.java	77.20% <0.00%> (-2.21%)	⬇️
.../dubbo/rpc/protocol/dubbo/filter/FutureFilter.java	54.54% <0.00%> (-2.03%)	⬇️
...libaba/dubbo/rpc/protocol/dubbo/DubboProtocol.java	58.33% <0.00%> (-0.88%)	⬇️
...bo/remoting/transport/netty/NettyCodecAdapter.java	54.68% <0.00%> (+1.56%)	⬆️
...ba/dubbo/remoting/transport/netty/NettyServer.java	71.92% <0.00%> (+3.50%)	⬆️
...ba/dubbo/remoting/transport/netty/NettyClient.java	83.05% <0.00%> (+10.16%)	⬆️

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