Initializing the lambda functions containers is so slow

[aleCeres]

I was trying to run aws sam in my local environment using the following command:

sam local start-api --docker-network my_docker_network --port 4000 --warm-containers EAGER

this is what I see in the log

Initializing the lambda functions containers.
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
Building image...Building image...Building image...Building image...Building image...RuntimeDependenciesLayer is a local Layer in the template
Building image...Building image...Building image...RuntimeDependenciesLayer is a local Layer in the template
RuntimeDependenciesLayer is a local Layer in the template
Building image...Building image...Building image...Building image............................................................................................

So I have implemented 10 api (10 lambdas) but the initialization time to build the containers is about 7 minutes.

Noderuntime: node14.x SAM CLI, version 1.23.0

Any advise to improve build time of lambda function containers? Thanks in advance.

[CoshUS]

Can you provide log with --debug flag specified and also your docker version? I tried to reproduce this with similar number of Image type functions and they finished within a minute. One possible workaround is to use --warm-containers LAZY and defer emulation image building to later when functions are invoked.

[aleCeres]

Sure:

• Docker version 20.10.6, build 370c289
• log:

  
  2021-07-09 16:27:50,997 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
  2021-07-09 16:27:50,998 | Using config file: samconfig.toml, config environment: default
  2021-07-09 16:27:50,998 | Expand command line arguments to:
  2021-07-09 16:27:50,998 | --template_file=/pathToTemplate/template.yml --docker_network=td_net --port=4000 --warm_containers=EAGER --host=127.0.0.1 --static_dir=public --layer_cache_basedir=/Users/path_to_home/.aws-sam/layers-pkg --container_host=localhost --container_host_interface=127.0.0.1
  2021-07-09 16:27:51,115 | local start-api command is called
  2021-07-09 16:27:51,148 | No Parameters detected in the template
  2021-07-09 16:27:51,194 | 15 stacks found in the template
  2021-07-09 16:27:51,194 | No Parameters detected in the template
  2021-07-09 16:27:51,233 | 15 resources found in the stack
  2021-07-09 16:27:51,233 | No Parameters detected in the template
  2021-07-09 16:27:51,273 | No Parameters detected in the template
  2021-07-09 16:27:51,311 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,311 | Found Serverless function with name='f1' and CodeUri='.'
  2021-07-09 16:27:51,311 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,312 | No Parameters detected in the template
  2021-07-09 16:27:51,353 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,354 | Found Serverless function with name='f2' and CodeUri='.'
  2021-07-09 16:27:51,354 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,354 | No Parameters detected in the template
  2021-07-09 16:27:51,391 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,392 | Found Serverless function with name='f3' and CodeUri='.'
  2021-07-09 16:27:51,392 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,392 | No Parameters detected in the template
  2021-07-09 16:27:51,430 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,430 | Found Serverless function with name='f4' and CodeUri='.'
  2021-07-09 16:27:51,430 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,430 | No Parameters detected in the template
  2021-07-09 16:27:51,470 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,471 | Found Serverless function with name='f5' and CodeUri='.'
  2021-07-09 16:27:51,471 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,471 | No Parameters detected in the template
  2021-07-09 16:27:51,510 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,511 | Found Serverless function with name='f6' and CodeUri='.'
  2021-07-09 16:27:51,511 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,511 | No Parameters detected in the template
  2021-07-09 16:27:51,551 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,551 | Found Serverless function with name='f7' and CodeUri='.'
  2021-07-09 16:27:51,551 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,551 | No Parameters detected in the template
  2021-07-09 16:27:51,593 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,593 | Found Serverless function with name='f8' and CodeUri='.'
  2021-07-09 16:27:51,593 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,593 | No Parameters detected in the template
  2021-07-09 16:27:51,633 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,633 | Found Serverless function with name='f9' and CodeUri='.'
  2021-07-09 16:27:51,633 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,633 | No Parameters detected in the template
  2021-07-09 16:27:51,672 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,672 | Found Serverless function with name='f10' and CodeUri='.'
  2021-07-09 16:27:51,672 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,672 | No Parameters detected in the template
  2021-07-09 16:27:51,711 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,712 | Found Serverless function with name='f11' and CodeUri='.'
  2021-07-09 16:27:51,712 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,712 | No Parameters detected in the template
  2021-07-09 16:27:51,753 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,753 | Found Serverless function with name='f12' and CodeUri='.'
  2021-07-09 16:27:51,753 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,753 | No Parameters detected in the template
  2021-07-09 16:27:51,789 | --base-dir is not presented, adjusting uri ./ relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,789 | Found Serverless function with name='f13' and CodeUri='.'
  2021-07-09 16:27:51,789 | --base-dir is not presented, adjusting uri . relative to /pathToTemplate/template.yml
  2021-07-09 16:27:51,802 | Initializing the lambda functions containers.
  2021-07-09 16:27:51,803 | Async execution started
  2021-07-09 16:27:51,803 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f1', functionname='f1', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f1/f1.f1', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e97a070>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f1', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,824 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f2', functionname='f2', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f2/f2.f2', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e85cf10>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f2', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,824 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f3', functionname='f3', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f3/f3.f3', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e85cee0>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f3', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,824 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f4', functionname='f4', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f4/f4.f4', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8b0490>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f4', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,825 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f5', functionname='f5', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f5/f5.f5', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8b0130>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f5', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,827 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f6', functionname='f6', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f6/f6.f6', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e85c460>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f6', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,827 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f7', functionname='f7', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f7/f7.f7', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e85c1f0>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f7', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,828 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f8', functionname='f8', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f8/f8.f8', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8c9f10>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f8', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,830 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f9', functionname='f9', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f9/f9.f9', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8165e0>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f9', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,833 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f10', functionname='f10', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f10/f10.f10', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e85ce80>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f10', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,835 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f11', functionname='f11', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f11/f11.f11', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10ea27160>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f11', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,837 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,838 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f12', functionname='f12', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f12/f12.f12', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8b0190>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f12', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,838 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,841 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,844 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,846 | Invoking function functools.partial(<function InvokeContext._initialize_all_functions_containers.<locals>.initialize_function_container at 0x10e847af0>, Function(name='f13', functionname='f13', runtime='nodejs14.x', memory=128, timeout=100, handler='dist/handlers/f13/f13.f13', imageuri=None, packagetype='Zip', imageconfig=None, codeuri='path_to_repo', environment={'Variables': {ENV: $ENV}'}}, rolearn='arn:aws:iam::AWS_ROOT_ID:role/my_role', layers=[<samcli.lib.providers.provider.LayerVersion object at 0x10e8169a0>], events={'Api': {'Type': 'Api', 'Properties': {'Path': '/f13', 'Method': 'POST', 'RestApiId': 'ServerlessRestApi'}}}, metadata={'BuildMethod': 'makefile'}, inlinecode=None, codesign_config_arn=None, stack_path=''))
  2021-07-09 16:27:51,847 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,859 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,860 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,867 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,869 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,873 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,874 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,877 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,907 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,883 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,883 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,883 | Waiting for async results
  2021-07-09 16:27:51,884 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,884 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,884 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,891 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,902 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,906 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,881 | Environment variables overrides data is standard format
  2021-07-09 16:27:51,920 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,922 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,930 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:51,958 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:51,988 | Loading AWS credentials from session with profile 'None'
  2021-07-09 16:27:52,012 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,016 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,019 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,042 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,047 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,047 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,050 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,051 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,055 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,056 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,059 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,060 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,060 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,065 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,065 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,068 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,072 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,073 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,074 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,089 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,074 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,075 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,076 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,077 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,077 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,077 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,078 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,089 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,089 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,089 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,089 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,075 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,090 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,090 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,091 | Resolved absolute path to code is path_to_repo
  Building image...Building image...2021-07-09 16:27:52,091 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,091 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,091 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,092 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,092 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,092 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,093 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,093 | Resolved absolute path to code is path_to_repo
  2021-07-09 16:27:52,094 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,094 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,217 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,217 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,218 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,218 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,218 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,218 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,219 | Code path_to_repo is not a zip/jar file
  2021-07-09 16:27:52,221 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,222 | RuntimeDependenciesLayer is a local Layer in the template
  Building image...Building image...2021-07-09 16:27:52,222 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  Building image...2021-07-09 16:27:52,223 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,223 | RuntimeDependenciesLayer is a local Layer in the template
  Building image...2021-07-09 16:27:52,224 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,226 | RuntimeDependenciesLayer is a local Layer in the template
  2021-07-09 16:27:52,227 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,229 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  Building image...Building image...Building image...2021-07-09 16:27:52,232 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,233 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  2021-07-09 16:27:52,235 | Resolving code path. Cwd=path_to_repo, CodeUri=path_to_repo
  Building image...Building image...Building image...Building image...
  2021-07-09 16:36:00,972 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:00,972 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .. 2021-07-09 16:36:01,474 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:01,475 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .......... 2021-07-09 16:36:07,602 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:07,602 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .. .. 2021-07-09 16:36:08,261 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:08,261 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:36:08,328 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:08,328 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .. 2021-07-09 16:36:08,947 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:08,947 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container ... . 2021-07-09 16:36:11,872 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:11,872 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:36:11,891 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:11,892 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .. 2021-07-09 16:36:12,422 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:12,422 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container .. ..2021-07-09 16:36:12 Connection pool is full, discarding connection: localhost

2021-07-09 16:36:12,548 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:12,549 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container ..2021-07-09 16:36:12 Connection pool is full, discarding connection: localhost

..2021-07-09 16:36:12 Connection pool is full, discarding connection: localhost

2021-07-09 16:36:12,714 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:12,716 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:36:12,717 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:12,718 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:36:12,762 | Skip pulling image and use local one: samcli/lambda:nodejs14.x-f88a901bbe51b578e9260ae49.

2021-07-09 16:36:12,762 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:36:12,762 | Mounting path_to_repo as /var/task:ro,delegated inside runtime container 2021-07-09 16:38:06,353 | Async execution completed 2021-07-09 16:38:06,354 | Containers Initialization is done. 2021-07-09 16:38:06,354 | No Parameters detected in the template 2021-07-09 16:38:06,395 | No Parameters detected in the template 2021-07-09 16:38:06,432 | Found '1' API Events in Serverless function with name 'f1' 2021-07-09 16:38:06,432 | Found '1' API Events in Serverless function with name 'f2' 2021-07-09 16:38:06,432 | Found '1' API Events in Serverless function with name 'f3' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f4' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f5' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f6' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f7' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f8' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f9' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f10' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f11' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f12' 2021-07-09 16:38:06,433 | Found '1' API Events in Serverless function with name 'f13' 2021-07-09 16:38:06,433 | Detected Inline Swagger definition 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f1' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f2' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f3' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f4' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f5' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f6' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f7' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f8' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f9' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f10' method='post' 2021-07-09 16:38:06,433 | Lambda function integration not found in Swagger document at path='/f11' method='post' 2021-07-09 16:38:06,434 | Lambda function integration not found in Swagger document at path='/f12' method='post' 2021-07-09 16:38:06,434 | Lambda function integration not found in Swagger document at path='/f13' method='post' 2021-07-09 16:38:06,434 | Found '0' APIs in resource 'ServerlessRestApi' 2021-07-09 16:38:06,434 | Removed duplicates from '0' Explicit APIs and '13' Implicit APIs to produce '13' APIs 2021-07-09 16:38:06,434 | 13 APIs found in the template 2021-07-09 16:38:06,444 | Mounting f7 at http://127.0.0.1:4000/f1 [POST] 2021-07-09 16:38:06,444 | Mounting f8 at http://127.0.0.1:4000/f2 [POST] 2021-07-09 16:38:06,444 | Mounting f13 at http://127.0.0.1:4000/f3 [POST] 2021-07-09 16:38:06,444 | Mounting f4 at http://127.0.0.1:4000/f4 [POST] 2021-07-09 16:38:06,444 | Mounting f5 at http://127.0.0.1:4000/f5 [POST] 2021-07-09 16:38:06,444 | Mounting f10 at http://127.0.0.1:4000/f6 [POST] 2021-07-09 16:38:06,444 | Mounting f2 at http://127.0.0.1:4000/f7 [POST] 2021-07-09 16:38:06,444 | Mounting f1 at http://127.0.0.1:4000/f8 [POST] 2021-07-09 16:38:06,444 | Mounting f3 at http://127.0.0.1:4000/f9 [POST] 2021-07-09 16:38:06,444 | Mounting f12 at http://127.0.0.1:4000/f10 [POST] 2021-07-09 16:38:06,474 | Mounting f9 at http://127.0.0.1:4000/f11 [POST] 2021-07-09 16:38:06,474 | Mounting f11 at http://127.0.0.1:4000/f12 [POST] 2021-07-09 16:38:06,474 | Mounting f6 at http://127.0.0.1:4000/f13 [POST] 2021-07-09 16:38:06,474 | You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template 2021-07-09 16:38:06,474 | Localhost server is starting up. Multi-threading = True 2021-07-09 16:38:06 * Running on http://127.0.0.1:4000/ (Press CTRL+C to quit)

And If I try to use `--warn-containers LAZY` the image building time when single function is invoked is still high.

[CoshUS]

I tried to reproduce it locally again with 15 nodejs14 functions but still didn't encounter the long image build time. It seems the warning Connection pool is full, discarding connection: localhost might be related. Can you try some of the solution in this post?

If the issue still persists, can you tell me more about your

• docker network/environment setup
• SAM project/function code
• Minimum number of functions to trigger this issue

[jfuss]

Closing given no response. If you are still encountering this, please create a new issue (closed issues are hard to track)