| A good explanation found in https://programmer.help/blogs/characters-are-defined-in-rfc-7230-and-rfc-3986.html Our remote Jenkins runs inside Tomcat, after Tomcat upgraded, Jobs can not be triggerred remotely anymore. We used a hacky workaround which temporarily solved this issue by simply replace [ with %5B and ] with %5D in remoteJobUrl in src/main/java/org/jenkinsci/plugins/ParameterizedRemoteTrigger/RemoteBuildConfiguration.java |