Merge pull request #1088 from wenxuwan/fix_zk_too_many_tcp_conn

upgrade hession version

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5
 	github.com/alibaba/sentinel-golang v1.0.2
 	github.com/apache/dubbo-getty v1.4.3
-	github.com/apache/dubbo-go-hessian2 v1.9.0-rc1
+	github.com/apache/dubbo-go-hessian2 v1.9.1
 	github.com/coreos/etcd v3.3.25+incompatible
 	github.com/creasty/defaults v1.5.1
 	github.com/dubbogo/go-zookeeper v1.0.3

go.sum

@@ -112,11 +112,8 @@ github.com/apache/dubbo-getty v1.3.10/go.mod h1:x6rraK01BL5C7jUM2fPl5KMkAxLVIx54
 github.com/apache/dubbo-getty v1.4.3 h1:PCKpryDasKOxwT5MBC6MIMO+0NLOaHF6Xco9YXQw7HI=
 github.com/apache/dubbo-getty v1.4.3/go.mod h1:ansXgKxxyhCOiQL29nO5ce1MDcEKmCyZuNR9oMs3hek=
 github.com/apache/dubbo-go v1.5.5/go.mod h1:KAty5L/vcHjh3qcTfC4R5Nfd0tkk7MLJnux/IQKfQLg=
-github.com/apache/dubbo-go-hessian2 v1.7.0/go.mod h1:7rEw9guWABQa6Aqb8HeZcsYPHsOS7XT1qtJvkmI6c5w=
-github.com/apache/dubbo-go-hessian2 v1.8.2 h1:CQq2Mmlrk6Fqmudwl9Dqps8drTrBFnmXRlzgOjj0FqA=
-github.com/apache/dubbo-go-hessian2 v1.8.2/go.mod h1:xQUjE7F8PX49nm80kChFvepA/AvqAZ0oh/UaB6+6pBE=
-github.com/apache/dubbo-go-hessian2 v1.9.0-rc1 h1:i8B4Nie8zGTsFfk84fdZmwRMdo6QmTmMtfGRjN1E43I=
-github.com/apache/dubbo-go-hessian2 v1.9.0-rc1/go.mod h1:xQUjE7F8PX49nm80kChFvepA/AvqAZ0oh/UaB6+6pBE=
+github.com/apache/dubbo-go-hessian2 v1.9.1 h1:ceSsU/9z/gv3hzUpl8GceEhQvF3i0BionfdHUGMmjHU=
+github.com/apache/dubbo-go-hessian2 v1.9.1/go.mod h1:xQUjE7F8PX49nm80kChFvepA/AvqAZ0oh/UaB6+6pBE=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e h1:QEF07wC0T1rKkctt1RINW/+RMTVmiwxETico2l3gxJA=