Building remotely on foo FATAL: null
java.lang.NullPointerException
	at hudson.slaves.WorkspaceList.allocate(WorkspaceList.java:179)
	at hudson.model.AbstractBuild$AbstractBuildExecution.decideWorkspace(AbstractBuild.java:484)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:521)
	at hudson.model.Run.execute(Run.java:1741)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:410)
[...]
No JDK named ‘null’ found
No JDK named ‘null’ found
ERROR: Error: No workspace found!
ERROR: Error: No workspace found!
No JDK named ‘null’ found