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fix: bug with lambda function updates #727

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fix: bug with lambda function updates #727

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fix: bug with lambda function updates (#1) 
## Resolves the ResourceConflictException error when updating an existing lambda function

```
Bundling: 'service.py'
Bundling: '.envrc'
Bundling: 'requirements.txt'
Bundling: 'Makefile'
Bundling: 'event.json'
Bundling: 'README.md'
Bundling: 'requirements-dev.txt'
Bundling: '.gitignore'
Updating your Lambda function
Traceback (most recent call last):
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/bin/lambda", line 213, in <module>
    cli()
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/click/core.py", line 1060, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/bin/lambda", line 117, in deploy
    aws_lambda.deploy(
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/aws_lambda/aws_lambda.py", line 138, in deploy
    update_function(
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/aws_lambda/aws_lambda.py", line 744, in update_function
    ret = client.update_function_configuration(**kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/botocore/client.py", line 570, in _api_call
    return self._make_api_call(operation_name, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/botocore/context.py", line 124, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tonyejack/.virtualenvs/sync_waf_ips-srms/lib/python3.11/site-packages/botocore/client.py", line 1031, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.errorfactory.ResourceConflictException: An error occurred (ResourceConflictException) when calling the UpdateFunctionConfiguration operation: The operation cannot be performed at this time. An update is in progress for resource: arn:aws:lambda:us-east-2:659424869662:function:sync_waf_ips
make: *** [deploy] Error 1
```
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@jackton1
jackton1 authored Mar 16, 2025
commit 7ffbe7868997b36db287927b75bde6d11670898d
22 changes: 20 additions & 2 deletions aws_lambda/aws_lambda.py
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Original file line number Diff line number Diff line change
Expand Up @@ -704,10 +704,14 @@ def update_function(
Publish=True,
)

# Wait for function to be updated
# Wait for function code to be updated
waiter = client.get_waiter('function_updated')
print("Waiting for code update to complete...")
waiter.wait(FunctionName=cfg.get("function_name"))

# Add a short delay to allow propagation
time.sleep(5)

kwargs = {
"FunctionName": cfg.get("function_name"),
"Role": role,
Expand Down Expand Up @@ -745,7 +749,21 @@ def update_function(
},
)

ret = client.update_function_configuration(**kwargs)
# Retry configuration update in case of conflicts
retries = 5
for attempt in range(retries):
try:
print("Updating function configuration...")
ret = client.update_function_configuration(**kwargs)
break
except client.exceptions.ResourceConflictException as e:
print(f"Conflict detected. Retrying... ({attempt + 1}/{retries})")
time.sleep(10) # Wait before retrying
else:
raise Exception(f"Failed to update function configuration after {retries} retries.")

# Add a short delay to allow propagation
time.sleep(5)

concurrency = get_concurrency(cfg)
if concurrency > 0:
Expand Down