The later version (11.0 – 11.2) of PCP have a fairly painful caveat when it comes to Unity Connection.  CUC is currently afflicted by a(nother) horrid Informix problem that will cause subscriber sync failures.

The defect is below:

• https://bst.cloudapps.cisco.com/bugsearch/bug/CSCux67499/?referring_site=bugquickviewclick

Unfortunately, there’s no workaround available as per the bug description:

Symptom:
User Sync of Unity Connection fails on Prime Collaboration Tool (PCP).
NullPointerException exception is seen in Nice log (PCP).

System or internal error java.lang.NullPointerException
java.sql.SQLException: System or internal error java.lang.NullPointerException
at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:488)
at com.informix.jdbc.IfxSqli.a(IfxSqli.java:9547)
at com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2634)
at com.informix.jdbc.IfxSqli.a(IfxSqli.java:1830)
at com.informix.jdbc.IfxSqli.executeStatementQuery(IfxSqli.java:1768)
at com.informix.jdbc.IfxSqli.executeStatementQuery(IfxSqli.java:1699)
at com.informix.jdbc.IfxResultSet.a(IfxResultSet.java:210)
at com.informix.jdbc.IfxStatement.executeQueryImpl(IfxStatement.java:1237)
at com.informix.jdbc.IfxPreparedStatement.executeQuery(IfxPreparedStatement.java:382)
at dfc.ipt.cisco.unity.util.UMPUtil.executeQuery(UMPUtil.java:247)

Conditions:
1) PCP User Sync in executed for Unity Connection
2) Having 5K or 20K End Users record in CUC11.x or 10.x

Workaround:
None

Please take note of the following, as this does affect planned PCP upgrades:

• http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/collaboration/11-2/provisioning/install_upgrade/guide/cpco_b_Cisco_Prime_Collaboration_Provisioning_Install_and_Upgrade_Guide_11_2/cpco_b_Cisco_Prime_Collaboration_Provisioning_Install_and_Upgrade_Guide_11_2_chapter_0110.html

Nice work from the technical documentation team in listing out the caveat in the upgrade guide!

Before upgrading, you need to install an engineering special in Cisco Unity Connection(10.5.x & 11.0) for successful subscriber synchronization. Contact TAC to obtain the Cisco Unity Connection engineering special for the bug (CSCux67499). If you are using Cisco Unity Connection release below 10.5, then you must upgrade to Cisco Unity Connection version 10.5.x and then apply the engineering special.

A call to TAC to request an ES is going to be required (as of the date of this blog post).  Cross-reference the bug “Fixed In” details and check if this has been included in a later Unity Connection SU.  If in doubt, call TAC for  assistance.