[JENKINS-43776] Form shows one credential when xml contains none

[jenkins-infra-bot]

I configured a job through the web UI, checked "SSH Agent" but didn't add any credentials. The saved `config.xml` file looks good:

"ssh-agent@​1.15">
  
  false  

When opening the configure web UI again the form shows one credential entry. When saving the form now (without changing anything) the credential entry is being stored in the `config.xml`:

"ssh-agent@​1.15">
  
    xxxxx
  
  false  

The expectation is that:

• if the `config.xml` doesn't contain a credential entry the web ui should not show one and
• opening the configure form and saving it without making any changes shouldn't add a credential entry

---

Originally reported by dthomas, imported from: Form shows one credential when xml contains none

• status: Open
• priority: Minor
• component(s): ghprb-plugin, ssh-agent-plugin
• resolution: Unresolved
• votes: 0
• watchers: 1
• imported: 20260604-211335

Raw content of original issue

I configured a job through the web UI, checked "SSH Agent" but didn't add any credentials. The saved `config.xml` file looks good:

<com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper plugin="ssh-agent@1.15">
  <credentialIds/>
  <ignoreMissing>false</ignoreMissing>  </com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper>

When opening the configure web UI again the form shows one credential entry. When saving the form now (without changing anything) the credential entry is being stored in the `config.xml`:

<com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper plugin="ssh-agent@1.15">
  <credentialIds>
    <string>xxxxx</string>
  </credentialIds>
  <ignoreMissing>false</ignoreMissing>  </com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper>

The expectation is that:

	
if the `config.xml` doesn't contain a credential entry the web ui should not show one and
	
opening the configure form and saving it without making any changes shouldn't add a credential entry

environment

Jenkins 2.46.1<br/>
ssh-agent-plugin 1.15<br/>
ghprb 1.36.1<br/>
master running on Ubuntu 16.04<br/>
Chromium 57

[jenkins-infra-bot]

dthomas:

• Original comment link
• Raw content of original comment:

  I have noticed the same problem in the `ghprb` plugin. When saving the settings with no "Blacklist Target Branches", reloading the form, it shows one empty entry for blacklisting target branches. This indicates that it might be a generic problem in the settings form.
  

I have noticed the same problem in the `ghprb` plugin. When saving the settings with no "Blacklist Target Branches", reloading the form, it shows one empty entry for blacklisting target branches. This indicates that it might be a generic problem in the settings form.