This is what you get.

Unable to load properties null: null
Error attaching to process: java.lang.RuntimeException: Missing property sun.jvm.hotspot.runtime.VM.saBuildVersion
sun.jvm.hotspot.debugger.DebuggerException: java.lang.RuntimeException: Missing property sun.jvm.hotspot.runtime.VM.saBuildVersion
at sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:437)
at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:307)
at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:142)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:185)
at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
at sun.jvm.hotspot.tools.JStack.main(JStack.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:502)
at sun.tools.jstack.JStack.runJStackTool(JStack.java:140)
at sun.tools.jstack.JStack.main(JStack.java:106)
Caused by: java.lang.RuntimeException: Missing property sun.jvm.hotspot.runtime.VM.saBuildVersion
at sun.jvm.hotspot.runtime.VM.checkVMVersion(VM.java:227)
at sun.jvm.hotspot.runtime.VM.<init>(VM.java:310)
at sun.jvm.hotspot.runtime.VM.initialize(VM.java:386)
at sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:433)
... 11 more

A workaround is to use -Dsun.jvm.hotspot.runtime.VM.disableVersionCheck=true