SA does not work on Ubuntu 11.04 or Ubuntu 10.10:

java.io.IOException
        at sun.jvm.hotspot.jdi.SAPIDAttachingConnector.attach(SAPIDAttachingConnector.java:126)
        at nsk.share.sajdi.Binder.attachToDebugee(Binder.java:133)
        at nsk.share.sajdi.Binder.bindToDebugee(Binder.java:45)
        at nsk.sajdi.VirtualMachine.canBeModified.canbemodif001.runIt(canbemodif001.java:51)
        at nsk.sajdi.VirtualMachine.canBeModified.canbemodif001.run(canbemodif001.java:26)
        at nsk.sajdi.VirtualMachine.canBeModified.canbemodif001.main(canbemodif001.java:21)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at sun.jvm.hotspot.jdi.SAPIDAttachingConnector.createVirtualMachine(SAPIDAttachingConnector.java:87)
        at sun.jvm.hotspot.jdi.SAPIDAttachingConnector.attach(SAPIDAttachingConnector.java:111)
        ... 5 more
Caused by: sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:152)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:268)
        at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:646)
        at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:634)
        at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:339)
        at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:314)
        at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:158)
        at sun.jvm.hotspot.jdi.VirtualMachineImpl.createVirtualMachineForPID(VirtualMachineImpl.java:222)
        ... 11 more
Caused by: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$100(LinuxDebuggerLocal.java:51)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1AttachTask.doit(LinuxDebuggerLocal.java:259)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:127)

Reproduces at least up to JDK 7 b80.


jmap fails with same error:
Attaching to process ID 6286, please wait...
Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
In addition to the Serviceability Agent (SA), this issue also
affects the Java tools that depend on the SA:

    $JAVA_HOME/bin/jinfo
    $JAVA_HOME/bin/jmap
    $JAVA_HOME/bin/jstack -F