Race Issue when deploying multiple stacks in parallel

I have a loop,

for stack in Stack1 Stack2 Stack3 
do
  cdk deploy $stack &
end

As written, the first one will sometimes die with this error:

SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at new CloudAssembly (/Users/sblackstone/code/lotto/stacks/node_modules/@aws-cdk/cx-api/lib/cloud-assembly.js:25:31)
    at CloudAssemblyBuilder.buildAssembly (/Users/sblackstone/code/lotto/stacks/node_modules/@aws-cdk/cx-api/lib/cloud-assembly.js:193:16)
    at Function.synth (/Users/sblackstone/code/lotto/stacks/node_modules/@aws-cdk/core/lib/construct.js:72:24)
    at App.synth (/Users/sblackstone/code/lotto/stacks/node_modules/@aws-cdk/core/lib/app.js:71:52)
    at process.<anonymous> (/Users/sblackstone/code/lotto/stacks/node_modules/@aws-cdk/core/lib/app.js:45:51)
    at Object.onceWrapper (events.js:291:20)
    at process.emit (events.js:203:13)
Subprocess exited with error 1

Adding a sleep 3 in that loop fixes the problem…

Thanks

Environment

• CLI Version 1.20.0 (build 021c521) :
• OS OSX :
• Language Javascript :

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This is 🐛 Bug Report

[richardhboyd]

maybe I am missing something, but why not use cdk deploy Stack* and let CDK handle ordering/deploying them?

[shivlaks]

resolving this as cdk deploy '*' will give you what you need as @richardhboyd mentioned. please reopen if you’re still running into issues here.