why it failed?

[ywandy]

yewei @ yeweivps1 in ~/code/composer-proj/xinou-app [7:42:07] C:130

$ composer-rest-server -c admin@collectable-penguin-network -p 3001 -m
Discovering types from business network definition ...
Discovered types from business network definition
Generating schemas for all types in business network definition ...
Registering named query: availablePenguins
Registering named query: myPenguins
Generated schemas for all types in business network definition
Adding schemas for all types to Loopback ...
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Swagger: skipping unknown type "org.collectable.penguin.Penguin".
Added schemas for all types to Loopback
SyntaxError: Unexpected end of JSON input
at JSON.parse ()
at Promise.then (/home/yewei/.nvm/versions/node/v8.11.3/lib/node_modules/composer-rest-server/server/server.js:141:34)
at
at process._tickCallback (internal/process/next_tick.js:188:7)