JDK: 1.3.1 u21 b01
OS: Solaris 9
arch: sun4u
machine: origin.russia.sun.com

About 11 test cases failed on jdk131 u21 with exceptions but passes on jdk131 u20.
Test case's list:
Permissions.sendDataGramSocketTest
Permissions.joinGroupMulticastTest
Permissions.sendMulticastSocketTest
Permissions.leaveGroupMulticastTest
Permissions.getLocalHostTest
Permissions.getAllByHostNameTest
Permissions.connectSocketTest
Permissions.connectDataGramSocketTest
Permissions.connectMulticastSocketTest
Permissions.receiveDataGramSocketTest
Permissions.acceptServerSocketTest

Exception message:
java.lang.NullPointerException
at sun.net.www.URLConnection.isProxiedHost(URLConnection.java:201)
at java.net.SocketPermission.getCanonName(SocketPermission.java:524)
at java.net.SocketPermission.impliesIgnoreMask(SocketPermission.java:779)
at java.net.SocketPermissionCollection.implies(SocketPermission.java:1166)
at java.security.Permissions.implies(Permissions.java:125)
at java.security.ProtectionDomain.implies(ProtectionDomain.java:83)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:252)
at java.security.AccessController.checkPermission(AccessController.java:394)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:540)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1037)
at java.net.InetAddress.getAllByName0(InetAddress.java:570)
at java.net.InetAddress.getAllByName(InetAddress.java:539)
at java.net.InetAddress.getAllByName(InetAddress.java:525)
at java.net.InetAddress.getLocalHost(InetAddress.java:756)
at sendDataGramSocketTest.run(sendDataGramSocketTest.java:51)
at SecurityTest.verify(SecurityTest.java:76)
at sendDataGramSocketTest.main(sendDataGramSocketTest.java:70)

Steps for reproducing:
1. login into origin.russia.sun.com
2. cd /export/home/JQA/ts131/security/src/Permissions
3. export JAVA_HOME=/export/JDK/j2sdk1_3_1_21/
4. export PATH=/export/JDK/j2sdk1_3_1_21/bin/:/usr/bin:/usr/sbin:/usr/bin:/usr/openwin/bin:/bin:/usr/ucb:/usr/NX/bin:/usr/dt/bin:/usr/openwin/bin
5. $JAVA_HOME/bin/java SecurityTestApplication "-Xmixed" SolSecTests_failed_Sol9sparc.html >> rerun_Sol9sparc 2>&1

Rusults will be located at "rerun_Sol9sparc". If you want to use jdk131 u20 you need properly change steps 3, 4.

Full logs location is
/net/stt-13/export/home0/results/1.3.1_21/b01/security/Sol9_sun4u/

See also some results in attachments.