Can not modify Xmx in a container in JBoss Fuse 6.2.0. Error: {... : No operation setJvmOpts found on MBean io.fabric8:type=Fabric","status":400 ...}

Issue

Failed to use "fabric:container-edit-jvm-options" to modify a container's xmx parameter, but Fuse always write back to the original values (overwriting instances.properties)

Further more, using curl command from KCS https://access.redhat.com/solutions/1599643 caused errors as below:

curl -v -H "Content-Type: application/json" -X POST http://xxxxx.yy:8181/jolokia  -d '{"operation":"setJvmOpts (java.lang.String,java.lang.String)","mbean":"io.fabric8:type=Fabric","arguments":["sepsa-agl","-Xmx1024m -Xms64m"],"type":"exec"}' --user "adm:******"
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 192.168.211.133...
* Connected to xxxx.yy (192.168.211.133) port 8181 (#0)
* Server auth using Basic with user 'most'
> POST /jolokia HTTP/1.1
> Host: xxxx.yy:8181
> Authorization: Basic bW9zdDplaXg5QWhydQ==
> User-Agent: curl/7.45.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 155
> 
* upload completely sent off: 155 out of 155 bytes
< HTTP/1.1 200 OK
< Content-Type: text/plain;charset=UTF-8
< Cache-Control: no-cache
< Pragma: no-cache
< Date: Mon, 02 Nov 2015 19:22:15 GMT
< Expires: Mon, 02 Nov 2015 18:22:15 GMT
< Content-Length: 4429
< Server: Jetty(8.1.17.v20150415)
< 
{"error_type":"java.lang.IllegalArgumentException","error":"java.lang.IllegalArgumentException : No operation setJvmOpts  found on MBean io.fabric8:type=Fabric","status":400,"request":{"operation":"setJvmOpts (java.lang.String,java.lang.String)","mbean":"io.fabric8:type=Fabric","arguments":["sepsa-agl","-Xmx1024m -Xms64m"],"type":"exec"},"stacktrace":"java.lang.IllegalArgumentException: No operation setJvmOpts  found on MBean io.fabric8:type=Fabric\n\tat org.jolokia.handler.ExecHandler.extractMBeanParameterInfos(ExecHandler.java:175)\n\tat org.jolokia.handler.ExecHandler.extractOperationTypes(ExecHandler.java:143)\n\tat org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:84)\n\tat org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:40)\n\tat org.jolokia.handler.JsonRequestHandler.handleRequest(JsonRequestHandler.java:89)\n\tat org.jolokia.backend.MBeanServerExecutorLocal.handleRequest(MBeanServerExecutorLocal.java:109)\n\tat org.jolokia.backend.MBeanServerHandler.dispatchRequest(MBeanServerHandler.java:102)\n\tat org.jolokia.backend.LocalRequestDispatcher.dispatchRequest(LocalRequestDispatcher.java:98)\n\tat org.jolokia.backend.BackendManager.callRequestDispatcher(BackendManager.java:410)\n\tat org.jolokia.backend.BackendManager.handleRequest(BackendManager.java:158)\n\tat org.jolokia.http.HttpRequestHandler.executeRequest(HttpRequestHandler.java:197)\n\tat org.jolokia.http.HttpRequestHandler.handlePostRequest(HttpRequestHandler.java:137)\n\tat org.jolokia.http.AgentServlet$3.handleRequest(AgentServlet.java:425)\n\tat org.jolokia.http.AgentServlet$2.run(AgentServlet.java:316)\n\tat org.jolokia.http.AgentServlet$2.run(AgentServlet.java:314)\n\tat java.security.AccessController.doPrivileged(Native Method)\n\tat javax.security.auth.Subject.doAs(Subject.java:415)\n\tat org.jolokia.http.AgentServlet.handleSecurely(AgentServlet.java:314)\n\tat org.jolokia.http.AgentServlet.handle(AgentServlet.java:291)\n\tat org.jolokia.http.AgentServlet.doPost(AgentServlet.java:259)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:595)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:668)\n\tat org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)\n\tat org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:69)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)\n\tat org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:240)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)\n\tat org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:75)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:370)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:982)\n\tat org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1043)\n\tat org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)\n\tat org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)\n\tat org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)\n\tat org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectCha* Connection #0 to host xxxx.yy left intact
nnelEndPoint.java:696)\n\tat org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)\n\tat java.lang.Thread.run(Thread.java:745)\n"}