The issue causes random failures on some nightly test bed:
http://aurora.ru.oracle.com/functional/faces/RunDetails.xhtml?names=1124907.SCA-DEPLOYMENT-1
From trace http://aurora-ds3.us.oracle.com:9502/runs/01124/1124907.SCA-DEPLOYMENT/1124907.SCA-DEPLOYMENT-1/reports/html/javaws/javawssecurity/BetterTimestampHandligTest_testCaValidEeExpired_HIGH.trace
the failres are due to exception:

java.net.SocketException: Malformed reply from SOCKS server
at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:139)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:465)
at java.net.Socket.connect(Socket.java:591)
at java.net.Socket.connect(Socket.java:540)
at java.net.Socket.<init>(Socket.java:436)
at java.net.Socket.<init>(Socket.java:213)
at deploy.sqe.drivers.ResultSender$1.run(ResultSender.java:142)
at deploy.sqe.drivers.ResultSender$1.run(ResultSender.java:138)
at java.security.AccessController.doPrivileged(Native Method)
at deploy.sqe.drivers.ResultSender.connectToServer(ResultSender.java:138)
at deploy.sqe.drivers.UIDriver.setResult(UIDriver.java:283)
at deploy.sqe.drivers.UIDriver.run(UIDriver.java:202)
at java.lang.Thread.run(Thread.java:747)

After doing some analysis it is found that although jnlp was loaded without proxy as expected:
network: Connecting http://127.0.0.1:8080/javawssecurity/jnlp/testCaValidEeExpired_HIGH.jnlp with proxy=DIRECT

But the JDF driver tries to connect to listner using proxy:
network: Connecting socket://10.128.69.37:51135 with proxy=SOCKS @ www-proxy.us.oracle.com/148.87.19.20:80