JsiiErrors / EAGAIN when using node>=13.2 with Python, Java & .NET

[DrLuke]

When deploying, some file is temporarily unavailable.

Reproduction Steps

from aws_cdk import (
 core
)

class Stack(core.Stack):
 def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
 super().__init__(scope, id, **kwargs)

app = core.App()
stack = Stack(app, "Test")

app.synth()

Then deploy

$ cdk deploy --app "python stack.py"

Error Log

$ cdk deploy --app "python stack.py"
internal/fs/utils.js:220
 throw err;
 ^

Error: EAGAIN: resource temporarily unavailable, read
 at Object.readSync (fs.js:516:3)
 at SyncStdio.readLine (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13322:25)
 at InputOutput.read (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13272:34)
 at KernelHost.run (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7228:32)
 at Immediate.<anonymous> (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7236:37)
 at processImmediate (internal/timers.js:439:21){
 errno: -11,
 syscall: 'read',
 code: 'EAGAIN'
}
Traceback (most recent call last):
 File "stack_bugreport.py", line 1, in <module>
 from aws_cdk import (
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/aws_apigateway/__init__.py", line 548, in <module>
 import aws_cdk.aws_certificatemanager
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/aws_certificatemanager/__init__.py", line 104, in <module>
 import aws_cdk.aws_cloudformation
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/aws_cloudformation/__init__.py", line 125, in <module>
 import aws_cdk.aws_iam
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/aws_iam/__init__.py", line 169, in <module>
 import aws_cdk.region_info
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/region_info/__init__.py", line 113, in <module>
 __jsii_assembly__ = jsii.JSIIAssembly.load("@aws-cdk/region-info", "1.18.0", __name__, "region-info@1.18.0.jsii.tgz")
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_runtime.py", line 40, in load
 _kernel.load(assembly.name, assembly.version, os.fspath(assembly_path))
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 209, in load
 self.provider.load(LoadRequest(name=name, version=version, tarball=tarball))
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 330, in load
 return self._process.send(request, LoadResponse)
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 310, in send
 self._next_message(), _ProcessResponse_R
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 261, in _next_message
 return json.loads(self._process.stdout.readline(), object_hook=ohook)
 File "/usr/lib/python3.7/json/__init__.py", line 361, in loads
 return cls(**kw).decode(s)
 File "/usr/lib/python3.7/json/decoder.py", line 337, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "/usr/lib/python3.7/json/decoder.py", line 355, in raw_decode
 raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
Subprocess exited with error 1

Workaround for the time being

Downgrade node to version 12.13.1

Environment

• CLI Version : 1.18.0 (build bc924bc)
• Framework Version: 1.18.0
• OS : Linux
• Language : Python

---

This is 🐛 Bug Report

[shivlaks]

@DrLuke - Can you do a cdk ls from the directory with your cdk.json file to list all the stacks? You can provide those stacks in your cdk deploy [STACKS] to deploy the stack(s) named STACKS or cdk deploy "*" to deploy all stacks

[DrLuke]

I tried, but I get the same error message.

[shivlaks]

@DrLuke - can you share the output with a -v added to the cdk CLI commands you're running?

[DrLuke]

@shivlaks Like this?

$ cdk deploy "*" -v
CDK toolkit version: 1.18.0 (build bc924bc)
Command line arguments:{
 _: [ 'deploy' ],
 v: true,
 verbose: true,
 'ignore-errors': false,
 ignoreErrors: false,
 json: false,
 j: false,
 ec2creds: undefined,
 i: undefined,
 'version-reporting': undefined,
 versionReporting: undefined,
 'path-metadata': true,
 pathMetadata: true,
 'asset-metadata': true,
 assetMetadata: true,
 'role-arn': undefined,
 r: undefined,
 roleArn: undefined,
 staging: true,
 'no-color': false,
 noColor: false,
 'build-exclude': [],
 E: [],
 buildExclude: [],
 ci: false,
 execute: true,
 '$0': 'cdk',
 STACKS: [ '*' ],
 stacks: [ '*' ]
}
Determining whether we're on an EC2 instance.
Does not look like EC2 instance.
cdk.json:{
 "app": "python3 stack.py"
}
cdk.context.json:{
 "@aws-cdk/core:enableStackNameDuplicates": "true"
}
merged settings:{
 versionReporting: true,
 pathMetadata: true,
 output: 'cdk.out',
 app: 'python3 stack.py',
 context:{},
 tags: [],
 assetMetadata: true,
 toolkitBucket:{},
 staging: true
}
Setting "CDK_DEFAULT_REGION" environment variable to eu-central-1
Resolving default credentials
Retrieved account ID xxx from disk cache
Setting "CDK_DEFAULT_ACCOUNT" environment variable to xxx
context:{
 '@aws-cdk/core:enableStackNameDuplicates': 'true',
 'aws:cdk:enable-path-metadata': true,
 'aws:cdk:enable-asset-metadata': true
}
outdir: cdk.out
env:{
 CDK_DEFAULT_REGION: 'eu-central-1',
 CDK_DEFAULT_ACCOUNT: 'xxx',
 CDK_CONTEXT_JSON: '{"@aws-cdk/core:enableStackNameDuplicates":"true","aws:cdk:enable-path-metadata":true,"aws:cdk:enable-asset-metadata":true}',
 CDK_OUTDIR: 'cdk.out',
 CDK_CLI_ASM_VERSION: '1.16.0',
 CDK_CLI_VERSION: '1.18.0'
}
internal/fs/utils.js:220
 throw err;
 ^

Error: EAGAIN: resource temporarily unavailable, read
 at Object.readSync (fs.js:516:3)
 at SyncStdio.readLine (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13322:25)
 at InputOutput.read (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13272:34)
 at KernelHost.run (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7228:32)
 at Immediate.<anonymous> (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7236:37)
 at processImmediate (internal/timers.js:439:21){
 errno: -11,
 syscall: 'read',
 code: 'EAGAIN'
}
Traceback (most recent call last):
 File "stack.py", line 9, in <module>
 app = core.App()
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_runtime.py", line 66, in __call__
 inst = super().__call__(*args, **kwargs)
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/core/__init__.py", line 3443, in __init__
 jsii.create(App, self, [props])
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 223, in create
 interfaces=[iface.__jsii_type__ for iface in getattr(klass, "__jsii_ifaces__", [])],
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 333, in create
 return self._process.send(request, CreateResponse)
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 310, in send
 self._next_message(), _ProcessResponse_R
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 261, in _next_message
 return json.loads(self._process.stdout.readline(), object_hook=ohook)
 File "/usr/lib/python3.7/json/__init__.py", line 361, in loads
 return cls(**kw).decode(s)
 File "/usr/lib/python3.7/json/decoder.py", line 337, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "/usr/lib/python3.7/json/decoder.py", line 355, in raw_decode
 raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
Subprocess exited with error 1
Error: Subprocess exited with error 1
 at ChildProcess.<anonymous> (/usr/lib/node_modules/aws-cdk/lib/api/cxapp/exec.ts:115:23)
 at ChildProcess.emit (events.js:210:5)
 at ChildProcess.EventEmitter.emit (domain.js:478:20)
 at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)

$ cdk ls -v
CDK toolkit version: 1.18.0 (build bc924bc)
Command line arguments:{
 _: [ 'ls' ],
 v: true,
 verbose: true,
 'ignore-errors': false,
 ignoreErrors: false,
 json: false,
 j: false,
 ec2creds: undefined,
 i: undefined,
 'version-reporting': undefined,
 versionReporting: undefined,
 'path-metadata': true,
 pathMetadata: true,
 'asset-metadata': true,
 assetMetadata: true,
 'role-arn': undefined,
 r: undefined,
 roleArn: undefined,
 staging: true,
 'no-color': false,
 noColor: false,
 long: false,
 l: false,
 '$0': 'cdk'
}
Determining whether we're on an EC2 instance.
cdk.json:{
 "app": "python3 stack.py"
}
Does not look like EC2 instance.
cdk.context.json:{
 "@aws-cdk/core:enableStackNameDuplicates": "true"
}
merged settings:{
 versionReporting: true,
 pathMetadata: true,
 output: 'cdk.out',
 app: 'python3 stack.py',
 context:{},
 tags: [],
 assetMetadata: true,
 toolkitBucket:{},
 staging: true
}
Setting "CDK_DEFAULT_REGION" environment variable to eu-central-1
Resolving default credentials
Retrieved account ID xxx from disk cache
Setting "CDK_DEFAULT_ACCOUNT" environment variable to xxx
context:{
 '@aws-cdk/core:enableStackNameDuplicates': 'true',
 'aws:cdk:enable-path-metadata': true,
 'aws:cdk:enable-asset-metadata': true
}
outdir: cdk.out
env:{
 CDK_DEFAULT_REGION: 'eu-central-1',
 CDK_DEFAULT_ACCOUNT: 'xxx',
 CDK_CONTEXT_JSON: '{"@aws-cdk/core:enableStackNameDuplicates":"true","aws:cdk:enable-path-metadata":true,"aws:cdk:enable-asset-metadata":true}',
 CDK_OUTDIR: 'cdk.out',
 CDK_CLI_ASM_VERSION: '1.16.0',
 CDK_CLI_VERSION: '1.18.0'
}
internal/fs/utils.js:220
 throw err;
 ^

Error: EAGAIN: resource temporarily unavailable, read
 at Object.readSync (fs.js:516:3)
 at SyncStdio.readLine (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13322:25)
 at InputOutput.read (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:13272:34)
 at KernelHost.run (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7228:32)
 at Immediate.<anonymous> (/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7236:37)
 at processImmediate (internal/timers.js:439:21){
 errno: -11,
 syscall: 'read',
 code: 'EAGAIN'
}
Traceback (most recent call last):
 File "stack.py", line 9, in <module>
 app = core.App()
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_runtime.py", line 66, in __call__
 inst = super().__call__(*args, **kwargs)
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/aws_cdk/core/__init__.py", line 3443, in __init__
 jsii.create(App, self, [props])
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 223, in create
 interfaces=[iface.__jsii_type__ for iface in getattr(klass, "__jsii_ifaces__", [])],
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 333, in create
 return self._process.send(request, CreateResponse)
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 310, in send
 self._next_message(), _ProcessResponse_R
 File "/home/drluke/work/di-client-api-message-dispatcher/venv/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 261, in _next_message
 return json.loads(self._process.stdout.readline(), object_hook=ohook)
 File "/usr/lib/python3.7/json/__init__.py", line 361, in loads
 return cls(**kw).decode(s)
 File "/usr/lib/python3.7/json/decoder.py", line 337, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "/usr/lib/python3.7/json/decoder.py", line 355, in raw_decode
 raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
Subprocess exited with error 1
Error: Subprocess exited with error 1
 at ChildProcess.<anonymous> (/usr/lib/node_modules/aws-cdk/lib/api/cxapp/exec.ts:115:23)
 at ChildProcess.emit (events.js:210:5)
 at ChildProcess.EventEmitter.emit (domain.js:478:20)
 at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)

[DrLuke]

This happened to me with a project that has already been deployed successfully multiple times before upgrading to 1.18.0, any cdk command gives me the same error message.

[shivlaks]

@DrLuke - gotcha that's good to know, what version was the app created with? I'd like to get full reproduction steps so I can dig deeper

[DrLuke]

@shivlaks Probably around 1.14.0, but I didn't use cdk init to create it. I manually created the stack file and always deployed with cdk deploy --app "python stack.py".

[shivlaks]

@DrLuke - got it. Does your cdk.out folder contain the template? Looks like the error is at the point where it'd read the existing stack template