Bug: (SAM CLI) Unexpected error running 'sam validate'

[smathez]

Description:

Since I upgraded sam cli to version 1.140, I get the error below every time I try to run sam validate on my templates.

Steps to reproduce:

run sam validate --lint on a sam template

Observed result:

Error: Tried to append rules but got an error: cannot import name 'RESOURCE_SPECS' from 'cfnlint.helpers' (/usr/local/aws-sam-cli/1.140.0/dist/_internal/cfnlint/helpers.pyc) Traceback: File "click/core.py", line 1082, in main File "click/core.py", line 1697, in invoke File "click/core.py", line 1443, in invoke File "click/core.py", line 788, in invoke File "samcli/cli/cli_config_file.py", line 347, in wrapper File "click/decorators.py", line 92, in new_func File "click/core.py", line 788, in invoke File "samcli/lib/telemetry/metric.py", line 185, in wrapped File "samcli/lib/telemetry/metric.py", line 150, in wrapped File "samcli/lib/utils/version_checker.py", line 43, in wrapped File "samcli/cli/main.py", line 95, in wrapper File "samcli/commands/_utils/cdk_support_decorators.py", line 40, in wrapped File "samcli/commands/_utils/command_exception_handler.py", line 89, in wrapper_command_exception_handler File "samcli/commands/_utils/command_exception_handler.py", line 69, in wrapper_command_exception_handler File "samcli/commands/validate/validate.py", line 70, in cli File "samcli/commands/validate/validate.py", line 87, in do_cli File "samcli/commands/validate/validate.py", line 176, in _lint File "cfnlint/api.py", line 62, in lint runner = Runner(config_mixin) ^^^^^^^^^^^^^^^^^^^^ File "cfnlint/runner.py", line 233, in init self._get_rules() File "cfnlint/runner.py", line 262, in _get_rules raise UnexpectedRuleException(

An unexpected error was encountered while executing "sam validate".

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

{
  "version": "1.140.0",
  "system": {
    "python": "3.11.10",
    "os": "Linux-6.6.87.1-microsoft-standard-WSL2-x86_64-with-glibc2.35"
  },
  "additional_dependencies": {
    "docker_engine": "Not available",
    "aws_cdk": "Not available",
    "terraform": "1.12.2"
  },
  "available_beta_feature_env_vars": [
    "SAM_CLI_BETA_FEATURES",
    "SAM_CLI_BETA_BUILD_PERFORMANCE",
    "SAM_CLI_BETA_TERRAFORM_SUPPORT",
    "SAM_CLI_BETA_PACKAGE_PERFORMANCE",
    "SAM_CLI_BETA_RUST_CARGO_LAMBDA"
  ]
}

[smathez]

After downgrade to 1.138 it works

[vicheey]

Thank you for reporting. I'll try to create the issue.

[valerena]

Hi. Do you still have this problem? Can you upgrade your version of SAM CLI to 1.142.1 and check if the problem persist? If it still does, can you please tell us more about your environment? Also, how did you install SAM CLI?

We don't see this problem on our side, so we need a little more information to try see where the problem might be

[LaymanTool]

I am on 1.142.1 and problem still persist. I thought that my template was invalid but looks like the command is failing cannot import name 'RESOURCE_SPECS' from 'cfnlint.helpers' (/usr/local/aws-sam-cli/1.142.1/dist/_internal/cfnlint/helpers.py)

Same lines as reported. 18:18:39 Error: Tried to append rules but got an error: cannot import name 'RESOURCE_SPECS' from 'cfnlint.helpers' (/usr/local/aws-sam-cli/1.142.1/dist/_internal/cfnlint/helpers.py) 18:18:39 Traceback: 18:18:39 File "click/core.py", line 1082, in main 18:18:39 File "click/core.py", line 1697, in invoke 18:18:39 File "click/core.py", line 1443, in invoke 18:18:39 File "click/core.py", line 788, in invoke 18:18:39 File "samcli/cli/cli_config_file.py", line 347, in wrapper 18:18:39 File "click/decorators.py", line 92, in new_func 18:18:39 File "click/core.py", line 788, in invoke 18:18:39 File "samcli/lib/telemetry/metric.py", line 185, in wrapped 18:18:39 File "samcli/lib/telemetry/metric.py", line 150, in wrapped 18:18:39 File "samcli/lib/utils/version_checker.py", line 43, in wrapped 18:18:39 File "samcli/cli/main.py", line 95, in wrapper 18:18:39 File "samcli/commands/_utils/cdk_support_decorators.py", line 40, in wrapped 18:18:39 File "samcli/commands/_utils/command_exception_handler.py", line 89, in wrapper_command_exception_handler 18:18:39 File "samcli/commands/_utils/command_exception_handler.py", line 69, in wrapper_command_exception_handler 18:18:39 File "samcli/commands/validate/validate.py", line 70, in cli 18:18:39 File "samcli/commands/validate/validate.py", line 87, in do_cli 18:18:39 File "samcli/commands/validate/validate.py", line 176, in _lint 18:18:39 File "cfnlint/api.py", line 63, in lint 18:18:39 runner = Runner(config_mixin) 18:18:39 ^^^^^^^^^^^^^^^^^^^^ 18:18:39 File "cfnlint/runner.py", line 233, in init 18:18:39 self._get_rules() 18:18:39 File "cfnlint/runner.py", line 262, in _get_rules 18:18:39 raise UnexpectedRuleException( 18:18:39 18:18:39 An unexpected error was encountered while executing "sam validate". 18:18:39 Search for an existing issue: 18:18:39 https://github.com/aws/aws-sam-cli/issues?q=is%3Aissue+is%3Aopen+Bug%3A%20sam%20validate%20-%20UnexpectedRuleException 18:18:39 Or create a bug report: 18:18:39 https://github.com/aws/aws-sam-cli/issues/new?template=Bug_report.md&title=Bug%3A%20sam%20validate%20-%20UnexpectedRuleException

It runs successfully on my earlier version which was 1.98.0

I might try to download the code and give it a try.

[larsborasmussen]

I think this might be due the a contaminated installation environment. i had the same error with 1.142.1 and then i downgraded to 1.138.0 and it was the same error. I then removed the two versions from /usr/local/aws-sam-cli/v* and removed the sam-installation directory before installing and that fixed it. now both 1.138.0 and 1.142.1 works for me.

TLDR: Make sure you don't keep unzipping new versions into the same sam-installation directory when doing upgrades.