This may be a dup of 6360330 but it's not impossible to edit 6360330 as the jets/idl/rmi-iiop category is apparently migrated to BugDB.

Periodically we see JMX remote tests failing with an NPE like this:

java.lang.NullPointerException
	at org.omg.stub.javax.management.remote.rmi._RMIConnectionImpl_Tie._invoke(Unknown Source)
	at com.sun.corba.se.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:654)
	at com.sun.corba.se.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:205)
	at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1698)
	at com.sun.corba.se.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:171)
	at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:148)
	at org.omg.CORBA.portable.ObjectImpl._invoke(ObjectImpl.java:475)
	at com.sun.jmx.remote.protocol.iiop.ProxyStub._invoke(Unknown Source)
	at org.omg.stub.javax.management.remote.rmi._RMIConnection_Stub.getDefaultDomain(Unknown Source)
	at javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.getDefaultDomain(RMIConnector.java:1042)

Shanliang Jiang provides some analysis in 6360330.

The following is the complete output of a test run with jdk8/tl that demonstrates the failure.


--------------------------------------------------
TEST: javax/management/remote/mandatory/connection/ReconnectTest.java
JDK under test: (/tmp/jprt/P2/191612.albatem/testproduct/linux_x64_2.6-product)
java version "1.8.0-internal"
Java(TM) SE Runtime Environment (build 1.8.0-internal-201202111916.albatem.tl-b00)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b14, mixed mode)

ACTION: clean -- Passed. Clean successful
REASON: User specified action: run clean ReconnectTest 
TIME:   0.0 seconds
messages:
command: clean ReconnectTest
reason: User specified action: run clean ReconnectTest 
elapsed time (seconds): 0.0

ACTION: build -- Passed. Build successful
REASON: User specified action: run build ReconnectTest 
TIME:   1.106 seconds
messages:
command: build ReconnectTest
reason: User specified action: run build ReconnectTest 
elapsed time (seconds): 1.106

ACTION: compile -- Passed. Compilation successful
REASON: .class file out of date or does not exist
TIME:   1.106 seconds
messages:
command: compile /tmp/jprt/P2/191612.albatem/source/jdk/test/javax/management/remote/mandatory/connection/ReconnectTest.java
reason: .class file out of date or does not exist
elapsed time (seconds): 1.106
STDOUT:
STDERR:
Note: /tmp/jprt/P2/191612.albatem/source/jdk/test/javax/management/remote/mandatory/connection/ReconnectTest.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

ACTION: build -- Passed. All files up to date
REASON: Named class compiled on demand
TIME:   0.0 seconds
messages:
command: build ReconnectTest
reason: Named class compiled on demand
elapsed time (seconds): 0.0

ACTION: main -- Failed. Unexpected exit from test [exit code: 1]
REASON: User specified action: run main ReconnectTest 
TIME:   8.957 seconds
messages:
command: main ReconnectTest
reason: User specified action: run main ReconnectTest 
elapsed time (seconds): 8.957
STDOUT:
>>> test to reconnect.


>>> Test for protocol rmi
The default domain is DefaultDomain
************** Sleeping ...... 0
Sleep done.
The default domain is DefaultDomain
************** Sleeping ...... 1
Sleep done.
The default domain is DefaultDomain
************** Sleeping ...... 2
Sleep done.
The default domain is DefaultDomain
Close the client ...
Close the server ...
Bye bye.
>>> Test successed for rmi


>>> Test for protocol iiop
The default domain is DefaultDomain
************** Sleeping ...... 0
Sleep done.
>>> Test failed for iiop
java.lang.NullPointerException
	at org.omg.stub.javax.management.remote.rmi._RMIConnectionImpl_Tie._invoke(Unknown Source)
	at com.sun.corba.se.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:654)
	at com.sun.corba.se.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:205)
	at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1698)
	at com.sun.corba.se.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:171)
	at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:148)
	at org.omg.CORBA.portable.ObjectImpl._invoke(ObjectImpl.java:475)
	at com.sun.jmx.remote.protocol.iiop.ProxyStub._invoke(Unknown Source)
	at org.omg.stub.javax.management.remote.rmi._RMIConnection_Stub.getDefaultDomain(Unknown Source)
	at javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.getDefaultDomain(RMIConnector.java:1042)
	at ReconnectTest.test(ReconnectTest.java:110)
	at ReconnectTest.main(ReconnectTest.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:474)
	at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
	at java.lang.Thread.run(Thread.java:722)


>>> Test for protocol jmxmp
Skipping unsupported URL jmxmp
>>> Test successed for jmxmp
>>> TEST FAILED
STDERR:
Feb 11, 2012 12:02:22 PM ServerCommunicatorAdmin reqIncoming
WARNING: The server has decided to close this client connection.
Feb 11, 2012 12:02:22 PM ServerCommunicatorAdmin reqIncoming
WARNING: The server has decided to close this client connection.
Feb 11, 2012 12:02:28 PM ClientCommunicatorAdmin Checker-run
WARNING: Failed to check the connection: java.lang.NullPointerException

TEST RESULT: Failed. Unexpected exit from test [exit code: 1]
--------------------------------------------------