callStackTrace:
java.lang.Exception: Dangerous reflection access to sun.misc.Unsafe by class io.netty.util.internal.PlatformDependent0 detected!
[catch] at org.netbeans.TopSecurityManager.checkMemberAccess(TopSecurityManager.java:440)
at java.lang.Class.checkMemberAccess(Class.java:2287)
at java.lang.Class.getDeclaredField(Class.java:1950)
at io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:85)
at io.netty.util.internal.PlatformDependent.hasUnsafe0(PlatformDependent.java:482)
at io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:64)
at io.netty.util.AttributeKey.<clinit>(AttributeKey.java:32)
at org.hornetq.core.remoting.impl.netty.NettyConnector.<clinit>(NettyConnector.java:141)
at org.hornetq.core.remoting.impl.netty.NettyConnectorFactory.createConnector(NettyConnectorFactory.java:39)
at org.hornetq.core.client.impl.ClientSessionFactoryImpl.getConnection(ClientSessionFactoryImpl.java:1239)
at org.hornetq.core.client.impl.ClientSessionFactoryImpl.getConnectionWithRetry(ClientSessionFactoryImpl.java:1110)
at org.hornetq.core.client.impl.ClientSessionFactoryImpl.connect(ClientSessionFactoryImpl.java:255)
at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:881)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:669)
at org.hornetq.jms.client.HornetQConnectionFactory.createTopicConnection(HornetQConnectionFactory.java:193)
...connector.wildfly.context.ContextJMS.connect(ContextJMS.java:87)
....
if you give us some context maybe we can help. i can see a netbeans security manager being used for a start.