Starting with JDK 7u75 release, the SSLv3 protocol (Secure Socket Layer) has been deactivated and is not available by default. If your OUD server is running with JDK 7u75 or higher, you may experience issues with EUS when trying to authenticate:
ORA-28030: Server encountered problems accessing LDAP directory service
And OUD access log will display the following error:
[08/Jan/2016:10:43:13 +0100] CONNECT conn=26 from=10.166.139.54:48916 to=10.166.139.54:1636 protocol=LDAPS [08/Jan/2016:10:43:13 +0100] DISCONNECT conn=26 reason="I/O Error" msg="Client requested protocol SSLv3 not enabled or not supported"
The proper method to fix this issue is to apply patch 19285025 on the database, which will fix the LDAP library used to perform the connection between the database and OUD and use another algorithm.
A quick workaround is to edit the file $JRE_HOME/lib/security/java.security and remove “SSLv3” from the line defining jdk.tls.disabledAlgorithms (on the machine where OUD runs, for the java version used by OUD), then stop and restart OUD. This will allow OUD to use SSLv3. Note that this workaround should not be applied in production as SSLv3 is obsolete and should not be used anymore. The correct fix is to patch the database.