Defect #37633

API create issue relation method returns "406:Not Acceptable" error

Added by Tomoko Shimizu 3 months ago. Updated about 1 month ago.

Status:ClosedStart date:
Priority:NormalDue date:
Assignee:-% Done:


Category:REST API
Target version:-
Resolution:Cant reproduce Affected version:4.2.5


I tried to create issue relation by Curl, but it failed.
Could you please let me know if there is a workaround?

My environment:

Redmine 4.2.5
MySQL 5.7
Ruby 2.7.5

Curl command
note: API key has been replaced by "xxx".

curl -v -H "Content-Type: application/json" -X POST --data-binary "@rel.json" -H "X-Redmine-API-Key: xxx" http://ServerName/issues/1880736/relations.json


    "relation": {
            "issue_to_id": "1880711",
            "relation_type": "follows",
            "delay": 0

Returned error message on console

\< HTTP/1.1 406 Not Acceptable

Error messeage in production.log
note: my name has been replaced by xxx.

Started POST "/issues/1880736/relations.json" for at 2022-09-01 15:52:18 +0900
Processing by IssueRelationsController#create as JSON
  Parameters: {"relation"=>{"issue_to_id"=>"1880711", "relation_type"=>"follows", "delay"=>0}, "issue_id"=>"1880736"}
  Current user: xxx (id=xxx)
Completed 406 Not Acceptable in 990ms (ActiveRecord: 15.1ms)

ActionController::UnknownFormat (IssueRelationsController#create is missing a template for this request format and variant.

request.formats: ["application/json"]
request.variant: []):



#1 Updated by Mizuki ISHIKAWA 3 months ago

Thank you for writing a clear reproduction method.
However, I could not reproduce the issue in my environment (Redmine 4.2.5, Ruby 2.7.5)

$ curl -v -H "Content-Type: application/json" -X POST --data-binary "@rel.json" -H "X-Redmine-API-Key: xxx" http://localhost:3000/issues/1/relations.json
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying
* Connected to localhost ( port 3000 (#0)
> POST /issues/1/relations.json HTTP/1.1
> Host: localhost:3000
> User-Agent: curl/7.79.1
> Accept: */*
> Content-Type: application/json
> X-Redmine-API-Key: xxx
> Content-Length: 125
* Mark bundle as not supporting multiuse
< HTTP/1.1 201 Created
< X-Frame-Options: SAMEORIGIN
< X-XSS-Protection: 1; mode=block
< X-Content-Type-Options: nosniff
< X-Download-Options: noopen
< X-Permitted-Cross-Domain-Policies: none
< Referrer-Policy: strict-origin-when-cross-origin
< Content-Type: application/json; charset=utf-8
< Location: http://localhost:3000/relations/1
< ETag: W/"0036f8661ce63c9249d262c9dd7a2c2d" 
< Cache-Control: max-age=0, private, must-revalidate
< X-Request-Id: 4e9cc4fb-7564-453a-a0be-88fb46f86472
< X-Runtime: 0.060981
< Content-Length: 87
* Connection #0 to host localhost left intact

#2 Updated by Mizuki ISHIKAWA 3 months ago

Could you please try to reproduce the problem with a newly built Redmine with Docker as follows.
This is a verification to isolate whether the problem is client side or affected by Redmine configuration, etc.

docker run -p 3000:3000 --name redmine redmine:4.2.5
  • Access to http://localhost:3000
  • Create a project and issues, etc. (Create the data needed to set up issue relationships)
  • Make the API available and create an API key
  • Create issue relation by curl command

#3 Updated by Tomoko Shimizu about 1 month ago

  • Status changed from New to Resolved

Thank you, Mizuki Ishikawa -san.

We had applied a few patch to Redmine, and when we applied the same patch to 4.2.5, it was causing the bug.
Sorry for raising a Defect ticket here. Please close or delete the ticket.

#4 Updated by Mischa The Evil about 1 month ago

  • Status changed from Resolved to Closed
  • Resolution set to Cant reproduce

Thanks for the feedback.

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