0 Replies Latest reply on Dec 29, 2016 6:19 AM by mylos78

java.lang:type=MemoryPool not available

mylos78 Dec 29, 2016 6:19 AM

Hi all,

I'd need to use the MemoryPoolMXBean in order to set a threshold on the memory usage of WildFly 10. I'm using the following code to acquire the MemoryPoolMXBean from a MBeanServerConnection:

final MBeanServerConnection remote
        = connector.getMBeanServerConnection();

final MemoryPoolMXBean pool
        = ManagementFactory.newPlatformMXBeanProxy(
                remote,
                ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE,
                MemoryPoolMXBean.class);
pool.setUsageThreshold(50);

The problem is that, once connected, it seems that the MemoryPool MemoryPoolMXBean is not registered:

INFO: JBoss Remoting version 4.0.21.Final
Connected to MBean Server
Exception in thread "main" java.lang.IllegalArgumentException: javax.management.InstanceNotFoundException: java.lang:type=MemoryPool
    at java.lang.management.ManagementFactory.newPlatformMXBeanProxy(ManagementFactory.java:630)
    at browse.Monitor.connect(Monitor.java:38)
    at browse.Monitor.main(Monitor.java:82)
Caused by: javax.management.InstanceNotFoundException: java.lang:type=MemoryPool
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.isInstanceOf(DefaultMBeanServerInterceptor.java:1401)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.isInstanceOf(JmxMBeanServer.java:1091)
    at org.jboss.as.jmx.PluggableMBeanServerImpl$TcclMBeanServer.isInstanceOf(PluggableMBeanServerImpl.java:1510)
    at org.jboss.as.jmx.PluggableMBeanServerImpl.isInstanceOf(PluggableMBeanServerImpl.java:746)
    at org.jboss.as.jmx.BlockingNotificationMBeanServer.isInstanceOf(BlockingNotificationMBeanServer.java:256)
    at org.jboss.remotingjmx.protocol.v2.ServerProxy$InstanceofHandler.handle(ServerProxy.java:858)
    at org.jboss.remotingjmx.protocol.v2.ServerCommon$MessageReciever$1$1.run(ServerCommon.java:153)
    at org.jboss.as.jmx.ServerInterceptorFactory$Interceptor$1.run(ServerInterceptorFactory.java:75)
    at org.jboss.as.jmx.ServerInterceptorFactory$Interceptor$1.run(ServerInterceptorFactory.java:70)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:149)
    at org.jboss.as.jmx.ServerInterceptorFactory$Interceptor.handleEvent(ServerInterceptorFactory.java:70)
    at org.jboss.remotingjmx.protocol.v2.ServerCommon$MessageReciever$1.run(ServerCommon.java:149)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

I've tried with other MXBeans (such as RuntimeMXBean) and I'm able to access its information. Only this one seems not to be available.

Any idea how to solve this issue?

thanks

Mylos