2020-02-14 10:25:26.069 UTC [endorser] callChaincode -> INFO 6cc3 [channelheader][f4380706] Entry chaincode: name:"mychannel" 2020-02-14 10:25:27.750 UTC [chaincode] HandleTransaction -> ERRO 6cc4 [f4380706] Failed to handle GET_STATE. error: no revision tag detected github.com/hyperledger/fabric/core/ledger/util/couchdb.getRevisionHeader
if you attempt to GetState() on an empty string above error reflects in peer logs. apply proper checks inside your chaincode to check whether string is empty or not.