JmxRuntimeFactoryTest.jmxLocalConnect: Multiple threads own the same monitor

[olivergondza]

com.github.olivergondza.dumpling.factory.IllegalRuntimeStateException: Multiple threads own the same monitor '<0x3f32ca2b> (a java.lang.Class)':
"creatingAndTerminatingThreadsShouldBeHandledGracefully thread -17750" #146062
   java.lang.Thread.State: RUNNABLE
    at com.github.olivergondza.dumpling.factory.JvmRuntimeFactoryTest$1Thrd.run(JvmRuntimeFactoryTest.java:266)
    - locked <0x3f32ca2b> (a java.lang.Class)

AND

"creatingAndTerminatingThreadsShouldBeHandledGracefully thread -18269" #146027
   java.lang.Thread.State: RUNNABLE
    at com.github.olivergondza.dumpling.factory.JvmRuntimeFactoryTest$1Thrd.run(JvmRuntimeFactoryTest.java:266)
    - locked <0x3f32ca2b> (a java.lang.Class)

    at com.github.olivergondza.dumpling.model.ProcessRuntime.checkSanity(ProcessRuntime.java:81)
    at com.github.olivergondza.dumpling.model.ProcessRuntime.<init>(ProcessRuntime.java:55)
    at com.github.olivergondza.dumpling.model.mxbean.MXBeanRuntime.<init>(MXBeanRuntime.java:56)
    at com.github.olivergondza.dumpling.model.jmx.JmxRuntime.<init>(JmxRuntime.java:43)
    at com.github.olivergondza.dumpling.factory.JmxRuntimeFactory.extractRuntime(JmxRuntimeFactory.java:138)
    at com.github.olivergondza.dumpling.factory.JmxRuntimeFactory.fromConnection(JmxRuntimeFactory.java:119)
    at com.github.olivergondza.dumpling.factory.JmxRuntimeFactory.forLocalProcess(JmxRuntimeFactory.java:115)
    at com.github.olivergondza.dumpling.factory.JmxRuntimeFactoryTest.jmxLocalConnect(JmxRuntimeFactoryTest.java:107)

Seems to be a variant of similar problem with JVM factory.