[JENKINS-74889] Empty variable "reason" makes error message useless

[jenkins-infra-bot]

When the plugin throws an error when trying to execute the ssh-agent in a pipeline, it can be the case that there is no reason in the error log. 

hudson.AbortException: Failed to run ssh-agent: 
	at PluginClassLoader for ssh-agent//com.cloudbees.jenkins.plugins.sshagent.exec.ExecRemoteAgent.(ExecRemoteAgent.java:55) 

Without any reason, it is nearly impossible to debug this. Which brings me to a second point: How am I supposed to debug this now, with no useful error output?

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Originally reported by ger_senshi, imported from: Empty variable "reason" makes error message useless

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

Raw content of original issue

When the plugin throws an error when trying to execute the ssh-agent in a pipeline, it can be the case that there is no reason in the error log. 

hudson.AbortException: Failed to run ssh-agent: 
	at PluginClassLoader for ssh-agent//com.cloudbees.jenkins.plugins.sshagent.exec.ExecRemoteAgent.<init>(ExecRemoteAgent.java:55) 

Without any reason, it is nearly impossible to debug this. Which brings me to a second point: How am I supposed to debug this now, with no useful error output?

environment

Jenkins Controller: Win Server 2022, Jenkins 2.462.1<br/>
Jenkins Agent: Win Server 2022<br/>
Plugin version: 376.v8933585c69d3