Bug: sam build - JSONDecodeError

[JoshLinneburg]

Bug: sam build - JSONDecodeError

[lucashuy]

Thanks for opening this issue, just want to confirm, is the SAM CLI being used the one that is provided in the runner, or is it a manual installation that you are using? Additionally, would it be possible to post more of the logs of the function that failed to build using the --debug flag? It might be difficult to capture this since as you mentioned, it's not consistent behaviour.

Just to poke at the command/template a bit, would it be possible to build within a container environment (ie. --use-container)?

[chandrapratapsingh007]

I encountered the same issue:

Error: Expecting value: line 1 column 1 (char 0)
Traceback:
  File "click/core.py", line 1078, in main
  File "click/core.py", line 1688, in invoke
  File "click/core.py", line 1434, in invoke
  File "click/core.py", line 783, 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 783, 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/build/command.py", line 169, in cli
  File "samcli/commands/build/command.py", line 258, in do_cli
  File "samcli/commands/build/build_context.py", line 284, in run
  File "samcli/lib/build/app_builder.py", line 226, in build
  File "samcli/lib/build/build_strategy.py", line [416](https://github.com/CloudBoltSoftware/mira-deployment-orchestration/actions/runs/9757836085/job/26931087142#step:32:422), in build
  File "samcli/lib/build/build_strategy.py", line 83, in build
  File "samcli/lib/build/build_strategy.py", line 422, in _build_functions
  File "samcli/lib/build/build_strategy.py", line 438, in _run_builds_async
  File "samcli/lib/utils/async_utils.py", line 137, in run_async
  File "samcli/lib/utils/async_utils.py", line 96, in run_given_tasks_async
  File "asyncio/base_events.py", line 654, in run_until_complete
  File "samcli/lib/utils/async_utils.py", line 62, in _run_given_tasks_async
  File "concurrent/futures/thread.py", line 58, in run
  File "samcli/lib/build/build_strategy.py", line 449, in build_single_function_definition
  File "samcli/lib/build/build_strategy.py", line 595, in build_single_function_definition
  File "samcli/lib/build/build_strategy.py", line 303, in build_single_function_definition
  File "samcli/lib/build/build_strategy.py", line 168, in build_single_function_definition
  File "samcli/lib/build/app_builder.py", line 723, in _build_function
  File "samcli/lib/build/app_builder.py", line 982, in _build_function_on_container
  File "samcli/lib/build/app_builder.py", line 1003, in _parse_builder_response
  File "json/__init__.py", line 346, in loads
  File "json/decoder.py", line 337, in decode
  File "json/decoder.py", line 355, in raw_decode

An unexpected error was encountered while executing "sam build".
Search for an existing issue:
https://github.com/aws/aws-sam-cli/issues?q=is%3Aissue+is%3Aopen+Bug%3A%20sam%20build%20-%20JSONDecodeError
Or create a bug report:
https://github.com/aws/aws-sam-cli/issues/new?template=Bug_report.md&title=Bug%3A%20sam%20build%20-%20JSONDecodeError
Error: Process completed with exit code 1.

This unexpected error occurred while executing the sam build.

Here's the command we are using in the GitHub action workflow:
sam build --template template.yaml --use-container

[cmyers009]

also encountered same issue today.