Jdi tests failing with "Address already in use" failure on x86-64

[sxa]

Intermittent failure showing up in (at least) x64 jobs

BLIC Listen address[1] = localhost:30050 listening on port 30050:...... at Sep 15, 2017 4:39:50 PM
BLIC Listen address[0] = localhost:30060 listening on port 30060:...... at Sep 15, 2017 4:39:50 PM
BLIC IO Exception from Listening VM (Connectors.java) on port 30060 @Sep 15, 2017 4:39:50 PM
BLIC Errors in accepting connection on port 30060
BLIC Errors vm object is null using these connection settings port 30060
BLIC stderr java.net.BindException: Address already in use (Bind failed)
BLIC stderr 	at java.net.PlainSocketImpl.socketBind(Native Method)
BLIC stderr 	at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
BLIC stderr 	at java.net.ServerSocket.bind(ServerSocket.java:375)
BLIC stderr 	at java.net.ServerSocket.bind(ServerSocket.java:329)
BLIC stderr 	at com.sun.tools.jdi.SocketTransportService.startListening(SocketTransportService.java:255)
BLIC stderr 	at com.sun.tools.jdi.SocketTransportService.startListening(SocketTransportService.java:283)
BLIC stderr 	at com.sun.tools.jdi.GenericListeningConnector.startListening(GenericListeningConnector.java:113)
BLIC stderr 	at com.sun.tools.jdi.SocketListeningConnector.startListening(SocketListeningConnector.java:85)
BLIC stderr 	at com.sun.tools.jdi.GenericListeningConnector.accept(GenericListeningConnector.java:158)
BLIC stderr 	at net.adoptopenjdk.test.jdi.debugger.Connectors.createListeningVM(Connectors.java:561)
BLIC stderr 	at net.adoptopenjdk.test.jdi.debugger.Connectors$CreateConnectionThread.run(Connectors.java:718)
BLIC ...... VirtualMachine obtained on port 30050 at Sep 15, 2017 4:39:59 PM
BLIC No errors in accepting connection on port 30050
BLIC ***** Finished connecting ******
BLIC 
BLIC ***** ERROR: vm0 was null ******
BLI1 stderr ERROR: transport error 202: recv failed during handshake: Connection reset by peer
BLI1 stderr ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
BLI1 stderr JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]