[JIRA] [core] (JENKINS-29109) 500 error for building without sending parameters

[de...@ikedam.jp (JIRA)]

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ikedam created an issue   Jenkins / JENKINS-29109 500 error for building without sending parameters Issue Type: Bug Assignee: ikedam Components: core Created: 27/Jun/15 1:37 AM Environment: Jenkins 1.609.1 Priority: Minor Reporter: ikedam Steps to reproduce: Install matrix-combinations-plugin Create a freestyle project Check "This build is parameterized" and add "Matrix Combinations Parameter" Set a name like "combination" Build with Parameters No parameters are shown as matrix combinations parameter doesn't work with free style projects. Click "Build" Jenkins fails with: WARNING: Error while serving http://localhost:8080/job/freestyle/build java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ... Caused by: java.lang.ClassCastException: net.sf.json.JSONNull cannot be cast to net.sf.json.JSONObject at hudson.model.ParametersDefinitionProperty._doBuild(ParametersDefinitionProperty.java:143) at jenkins.model.ParameterizedJobMixIn.doBuild(ParameterizedJobMixIn.java:169) at hudson.model.AbstractProject.doBuild(AbstractProject.java:1744) at hudson.model.AbstractProject.doBuild(AbstractProject.java:1750) ... 58 more Workarounds: (one of followings) Remove an invalid parameter. Add another parameter What happening inside Jenkins No "parameter" are posted to Jenkins, and StaplerRequest::getSubmittedForm().get("parameter") returns JSONNull. Though this is rather considered as a configuration issue, I want to fix that as I can. Add Comment   This message was sent by Atlassian JIRA (v6.4.2#64017-sha1:e244265) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.