Hyperledger fabric Hyperledger composer rest服务器错误grep

我将学习ibm文档第3部分中的hyperledger composer教程 链接： 当我执行composer rest server命令时，实际上启动了rest服务器，我得到了以下错误，不知道如何修复它

    Discovering types from business network definition ...
/usr/local/lib/node_modules/composer-rest-server/node_modules/fabric-client/lib/ChannelEventHub.js:666
                throw error;
                ^

Error: Connection is not in the READY state
    at ChannelEventHub._checkConnection (/usr/local/lib/node_modules/composer-rest-server/node_modules/fabric-client/lib/ChannelEventHub.js:664:17)
    at ChannelEventHub.registerChaincodeEvent (/usr/local/lib/node_modules/composer-rest-server/node_modules/fabric-client/lib/ChannelEventHub.js:825:8)
    at HLFConnection._registerForChaincodeEvents (/usr/local/lib/node_modules/composer-rest-server/node_modules/composer-connector-hlfv1/lib/hlfconnection.js:279:44)
    at HLFConnection._checkCCListener (/usr/local/lib/node_modules/composer-rest-server/node_modules/composer-connector-hlfv1/lib/hlfconnection.js:256:22)
    at Timeout.ccListenerHandle.setTimeout [as _onTimeout] (/usr/local/lib/node_modules/composer-rest-server/node_modules/composer-connector-hlfv1/lib/hlfconnection.js:381:35)
    at ontimeout (timers.js:482:11)
    at tryOnTimeout (timers.js:317:5)
    at Timer.listOnTimeout (timers.js:277:5)

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当我尝试使用composer rest server生成rest服务器时，会发生这种情况。短版本：使用composer rest server v0.19.4或更高版本

长版本：grpc for node最近更新为1.11，并引入了突破性的更改。此版本由composer所依赖的fabric node sdk自动获取。从v0.19.4开始，我们引入了规避措施，以确保首先引入兼容版本的grpc，从而解决此问题