Terraform: diffs didn't match during apply

[Vinnl]

Terraform Version

0.10.2

Terraform Configuration Files

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Main: https://gitlab.com/Flockademic/Flockademic/blob/39348abba57d54bbae8613a7c98b948a0798bb6a/stacks.tf

Which also refers to:

• https://gitlab.com/Flockademic/Flockademic/blob/39348abba57d54bbae8613a7c98b948a0798bb6a/stacks/api.tf
• https://gitlab.com/Flockademic/Flockademic/blob/39348abba57d54bbae8613a7c98b948a0798bb6a/stacks/periodicals/main.tf
• https://gitlab.com/Flockademic/Flockademic/blob/39348abba57d54bbae8613a7c98b948a0798bb6a/stacks/accounts/main.tf

Debug Output

This was in CI so I don't have full debug output, but you can see the graph and plan in the console output: https://gitlab.com/Flockademic/Flockademic/-/jobs/39886277

Note that the same config has worked successfully for many other commits already.

Expected Behavior

No error messages telling me to report a bug.

Actual Behavior

Error applying plan:

2 error(s) occurred:

* module.periodicals.aws_lambda_function.periodicals_lambda: aws_lambda_function.periodicals_lambda: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

    Terraform Version: 0.10.2
    Resource ID: aws_lambda_function.periodicals_lambda
    Mismatch reason: attribute mismatch: source_code_hash
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"source_code_hash":*terraform.ResourceAttrDiff{Old:"DSHeKmDA06FGms9QirmvMcxHC3uwesa4h9frWSpfvdg=", New:"5fbcft7nzfr5vdWLCoiTBNsDX36flBilQt4lqP5EGS4=", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
    Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff(nil), Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

Also include as much context as you can about your config, state, and the steps you performed to trigger this error.

* module.accounts.aws_lambda_function.accounts_lambda: aws_lambda_function.accounts_lambda: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

    Terraform Version: 0.10.2
    Resource ID: aws_lambda_function.accounts_lambda
    Mismatch reason: attribute mismatch: source_code_hash
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"source_code_hash":*terraform.ResourceAttrDiff{Old:"+THayxiz7yUXk+dLGIAG5dGVckEJrqYqdiRKBWuTCFQ=", New:"pQrRjnlaYgl9VwEaL5DGkmVMR/Z1V5e2sJgI8xISGS0=", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
    Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff(nil), Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

Steps to Reproduce

I don't really know...

Important Factoids

Running in CI. Retrying was successful.

References

[mavogel]

I have a similar behavior by decreasing the instances attached to an elb. If this is too different from the problem mentioned above, I can open a separate issue, but it seemed quite similar.

Terraform version: 0.10.2

Expected Behavior
No errors when instances of the elb are decreased due to changing the count variable of the instances.

Actual Behavior

* module.aws.aws_elb.web: aws_elb.web: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHubIssue.

Please include the following information in your report:

    Terraform Version: 0.10.8
    Resource ID: aws_elb.web
    Mismatch reason: attribute mismatch: instances.1424219465
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"instances.4025163768":*terraform.ResourceAttrDiff{Old:"i-0bc39689fef0300e4", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.1424219465":*terraform.ResourceAttrDiff{Old:"i-056b9a1d5b292ef2a", New:"i-056b9a1d5b292ef2a", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.#":*terraform.ResourceAttrDiff{Old:"7", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.2514422359":*terraform.ResourceAttrDiff{Old:"i-01362a6c1da31724e", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.2773104058":*terraform.ResourceAttrDiff{Old:"i-0dd45200001d77c52", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.2100288283":*terraform.ResourceAttrDiff{Old:"i-0380545626fdc87ad", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.3317007677":*terraform.ResourceAttrDiff{Old:"i-03e0539e630945089", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.509595657":*terraform.ResourceAttrDiff{Old:"i-0e01a0155f4cfb9bf", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
    Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"instances.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

Also include as much context as you can about your config, state, and the steps you performed to trigger this error.

Steps to Reproduce:
Decrease the number of instances of the elb.

Important Factoids:
After re-running terraform apply the error does not appear any more. The tfstate file is also correc

I'm implementing docker swarm for the docker-provider, hence I want to dynamically change the number of workers in the swarm and attach the instances to the elb

resource "aws_elb" "web" {
 ...
  instances = [
    "${concat(list(module.bootstrap_manager.id), 
                   module.managers.ids,
                   module.workers.ids)}",
  ]
...

[aaomoware]

just ran into the same issue.

Error: Error applying plan:

1 error(s) occurred:

* module.elb.aws_elb.elb: aws_elb.elb: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

    Terraform Version: 0.10.8
    Resource ID: aws_elb.elb
    Mismatch reason: attribute mismatch: instances.#
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"instances.1901399340":*terraform.ResourceAttrDiff{Old:"i-0c6af8141634ff6b1", New:"i-0c6af8141634ff6b1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.859596546":*terraform.ResourceAttrDiff{Old:"i-091b5dc5471e5c8e1", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.2268853288":*terraform.ResourceAttrDiff{Old:"i-0b32a848c7d9f69a5", New:"i-0b32a848c7d9f69a5", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.2072189744":*terraform.ResourceAttrDiff{Old:"i-0d4f6b9377fccf39f", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.#":*terraform.ResourceAttrDiff{Old:"8", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.710225761":*terraform.ResourceAttrDiff{Old:"i-09d5fbd1b25c809b2", New:"i-09d5fbd1b25c809b2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.1672254292":*terraform.ResourceAttrDiff{Old:"i-0dd0fb8ee81cf171b", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.3271768535":*terraform.ResourceAttrDiff{Old:"i-016ced761f29f7389", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "instances.3083787250":*terraform.ResourceAttrDiff{Old:"i-03c43b81458d308ff", New:"", NewComputed:false, NewRemoved:true, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
    Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff(nil), Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

Also include as much context as you can about your config, state, and the steps you performed to trigger this error.

[ranvijayj]

Same issue when updating the count of instances or adding any variable.

using s3 as backend to store state..

[slayer201]

Same issue but with lambda source code hash

• module.lambda.aws_lambda_function.lambda1: aws_lambda_function.lambda1: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

Terraform Version: 0.11.8
Resource ID: aws_lambda_function.lambda1
Mismatch reason: attribute mismatch: source_code_hash
Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0},

Any update on this issue or any workaround for this. As I am kind of stuck and terraform apply fails everytime. Here I am using plan.tfplan to plan first and then use this plan.tfplan for apply as well. Can this be reason of issue. Any help is much appreciated.

[bluescores]

* module.monitor_function.aws_lambda_function.lambda: aws_lambda_function.lambda: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

Terraform Version: 0.11.7
Resource ID: aws_lambda_function.lambda
Mismatch reason: attribute mismatch: source_code_hash

Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"source_code_hash":*terraform.ResourceAttrDiff{Old:"qk/Ekq87vKGr0jLR56W4NQJw0K3D0JPiLNazZ1mOy1Q=", New:"rY9zp5pnM7u9E71CtsMU4dfkgOQ41BpHzpjJ+yTM79E=", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "last_modified":*terraform.ResourceAttrDiff{Old:"2018-10-18T09:50:13.400+0000", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
[10:12:09][Step 3/5]     Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff(nil), Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

Steps to reproduce

For an aws.lambda resource, initially use the output_md5 as the source_code_hash:

source_code_hash = "${data.archive_file.package.output_md5}"

This was applied successfully many times over. I then switched to base64SHA256:

source_code_hash = "${base64sha256(file(data.archive_file.package.output_path))}"

The apply results in the error above.

I resolved my issue

I destroyed the lambda and re-ran the apply, similar to this.

terraform plan -destroy -target=module.monitor_function -out 1.plan
terraform apply 1.plan
terraform plan -out 2.plan
terraform apply 2.plan

Subsequent deployments have been working fine with base64SHA256.

[teamterraform]

Hello!

Thanks for reporting this issue. Unfortunately the error output in this "diffs didn't match" situation is often not enough to diagnose the problem. Starting in 0.12 the situation that causes this error is more precisely reported, and the necessary debugging information is recorded in the logs. If this issue persists after upgrading Terraform, please file an issue with the referenced provider.

Thanks

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