Io Exception: Unknown host specified; fails for cluster, OK for one server

SQL Developer 1.2.1.3213, BUILD MAIN-32.13, downloaded today, fails to connect to a remote two server Oracle cluster, until one of the two server DNS names and the comma between them is removed.
FYI: The known host value looks like: devrac1.mydomain.ca,devrac2.mydomain.ca
Change it to: devrac1.mydomain.ca and the connection will work as expected in 1.2.1
Error dialog: "Error Connecting" An error was encountered performing the requested operation.
"Io Exception: Unknown host specified"
"Vendor code 17002"
On SQL Developer version 1.1.0.15, build MAIN-15.57 all databases connect normally.
The correct operation or failure apply to either Oracle 9i or 10g, on Windows XP Professional, SP 2, with JDK 6 update 3.
Yours truly,
Mike Rainville
Version details:
Oracle 9i, 9.2.0.0.0. or
Oracle 10g, Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
Microsoft Windows XP [Version 5.1.2600]
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)
(original post in thread: Re: Connecting to a remote database recreated here per your request)
Mike Rainville
Montreal, Canada

You can also address both RAC nodes in your SQLDeveloper connection.
Open the connection properties and select "Advanced" as "Connection Type".
Use the following type of JDBC URL:
jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=on)(ADDRESS=(PROTOCOL=tcp)(HOST=devrac1.mydomain.ca)(PORT=1521))(ADDRESS=(PROTOCOL=tcp)(HOST=devrac2.mydomain.ca)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=devrac.mydomain.ca)))
Best,
Manfred

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>
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