Internal Server Error (500 status code) with message "Index 0 out of bounds for length 0"

[apibugsreporting]

Bug Description

I found several requests obtaining 500 status codes with the error message "Index 0 out of bounds for length 0"

General Information

Please include the following general information about the issue and list any additional steps needed to reproduce the bug.

• Version of the ohsome API [e.g. 1.5.0]
  • 1.6.1
• Which API instance was requested [e.g. remote instance at https://api.ohsome.org/v1, local instance with an h2 file or connected to the cluster, etc.]
  • Remote instance at https://api.ohsome.org/v1
• Affected endpoint(s) [e.g. /contributions/count]
  • All endpoints ending in /groupBy/boundary/groupBy/tag seem to be affected
• URL of your request (and request body if applicable)
  • https://api.ohsome.org/v1/elements/length/groupBy/boundary/groupBy/tag?filter=destination%3D*%20or%20id%3A%281%20..%209999%29&groupByKey=highway&format=geojson&showMetadata=yes&time=2008-05-30&timeout=32&bcircles=8.71322%2C49.424%2C1
• Used HTTP method [GET or POST]
  • Both
• Utilized tool/library for the request [e.g. cURL, Postman, ohsome-py, etc.]
  • RESTest

Expected Behaviour

A 500 status code (Internal Server Error) should not be returned. There is probably some uncaught exception in the code.

Further Information

Additional Information

A test report revealing this issue is available at the following URL (it might take some time to load):

• http://apitesting.ddns.net/fse2022/restest/target/allure-reports/ohsome__r_cbt_custom/#categories/882a17760bce9dccc99edbd9f7e59f35/8b096d2b2b728a5/