fix issue https://github.com/apache/incubator-dubbo/issues/4115

[zonghaishang]

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[codecov-io]

Codecov Report

Merging #4116 into master will increase coverage by 0.94%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4116      +/-   ##
============================================
+ Coverage      62.7%   63.64%   +0.94%     
- Complexity      475      478       +3     
============================================
  Files           763      770       +7     
  Lines         32866    34380    +1514     
  Branches       5184     5621     +437     
============================================
+ Hits          20608    21882    +1274     
- Misses         9884    10059     +175     
- Partials       2374     2439      +65

Impacted Files	Coverage Δ	Complexity Δ
.../apache/dubbo/remoting/etcd/jetcd/JEtcdClient.java	9.31% <ø> (+0.05%)	0 <0> (ø)	⬇️
.../org/apache/dubbo/rpc/filter/CompatibleFilter.java	70.27% <0%> (-13.07%)	0% <0%> (ø)
...ng/transport/dispatcher/all/AllChannelHandler.java	51.42% <0%> (-11.43%)	0% <0%> (ø)
...ache/dubbo/remoting/p2p/support/AbstractGroup.java	45.45% <0%> (-11.37%)	0% <0%> (ø)
.../remoting/transport/netty4/NettyServerHandler.java	61.9% <0%> (-9.53%)	0% <0%> (ø)
...rg/apache/dubbo/rpc/filter/ExecuteLimitFilter.java	78.57% <0%> (-8.1%)	0% <0%> (ø)
.../org/apache/dubbo/remoting/ExecutionException.java	15.78% <0%> (-5.27%)	0% <0%> (ø)
...va/org/apache/dubbo/remoting/TimeoutException.java	28.57% <0%> (-4.77%)	0% <0%> (ø)
...a/org/apache/dubbo/remoting/RemotingException.java	70.58% <0%> (-4.42%)	0% <0%> (ø)
...ache/dubbo/rpc/protocol/ProtocolFilterWrapper.java	87.5% <0%> (-0.74%)	0% <0%> (ø)
... and 52 more

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[ralf0131]

LGTM.

[ralf0131]

This fix #4115