[JENKINS-55656] URLs to matrixProject subtasks don't work behind Apache ProxyPass

My problem arises when:

• matrix job axis contains parameters with "/" sign (like: paths)


• Jenkins is proxied by Apache like in: JENKINS-12623

After run, lins to subtasks look like:

http://localhost:8080/job/matrixUrlProblem/PATH=%2FmyPath%2Ffile1/

Note that path parameter is encoded "/" changed to "%2F"

Everything works fine, but when I want to use http://jenkins.my.organization.com address, it doesn't work. Depending on AllowEncodedShlashes (see https://httpd.apache.org/docs/2.4/mod/core.html#allowencodedslashes ) setting results are differn:

• AllowEncodedShlashes Off: blocked by Apache


• AllowEncodedSlashes NoDecode: ERROR 404: Problem accessing /job/matrixUrlProblem/PATH=%252FmyPath%252Ffile1/ (% from original URL encoded as "%25")


• AllowEncodedSlashes On: ERROR 404: Problem accessing /job/matrixUrlProblem/PATH=/myPath/file1/ ("%2F" decoded back to /)

The easiest way is to classify it as problem outside Jenkins, but I hope you'll suggest some solution except "fix Apache"

---
Originally reported by robson, imported from: URLs to matrixProject subtasks don't work behind Apache ProxyPass

• assignee: kohsuke
  
• status: Open
  
• priority: Minor
  
• component(s): matrix-project-plugin
  
• label(s): plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 1
  
• imported: 2025-12-06
  

Raw content of original issue

My problem arises when:



	
matrix job axis contains parameters with "/" sign (like: paths)

	
Jenkins is proxied by Apache like in: JENKINS-12623



After run, lins to subtasks look like:


http://localhost:8080/job/matrixUrlProblem/PATH=%2FmyPath%2Ffile1/


Note that path parameter is encoded "/" changed to "%2F"


Everything works fine, but when I want to use http://jenkins.my.organization.com address, it doesn't work. Depending on AllowEncodedShlashes (see https://httpd.apache.org/docs/2.4/mod/core.html#allowencodedslashes ) setting results are differn:



	
AllowEncodedShlashes Off: blocked by Apache

	
AllowEncodedSlashes NoDecode: ERROR 404: Problem accessing /job/matrixUrlProblem/PATH=%252FmyPath%252Ffile1/ (% from original URL encoded as "%25")

	
AllowEncodedSlashes On: ERROR 404: Problem accessing /job/matrixUrlProblem/PATH=/myPath/file1/ ("%2F" decoded back to /)



The easiest way is to classify it as problem outside Jenkins, but I hope you'll suggest some solution except "fix Apache"

environment

```
Jenkins ver. 2.150.1

org.jenkins-ci.plugins:matrix-project:1.13

httpd-2.4.6-67.el7.centos.6.x86_64

CentOS Linux release 7.3.1611
```

Start by reproducing the matrix-project-plugin URL behavior with an axis value containing slashes behind Apache ProxyPass, using the reported Jenkins, matrix-project, Apache, and CentOS versions. Compare the results for AllowEncodedSlashes Off, NoDecode, and On; done should mean subtask URLs work through the proxy without the encoded path being blocked, double-encoded, or decoded into path separators.

Written by the indexing model from the issue text.