3016194 - JAVA server upgrade is failing - UDDI - NW 7.50 - accessExternalSchema property

The NW JAVA stack upgrade process has failed during the execution phase of SUM, more specifically in the deployment of the UDDI component.

SUM logs' DEPLOY-COMPONENTS_<XX>.<X>.LOG shows:

Deployment finished with error.
sap.com/UDDI: Deployment of archive \usr\sap\patche\UDDI<...>.SCA for component sap.com/UDDI aborted
Detailed message: 1. Already deployed component has version:<...>
1. Contains Aborted deployment component:
sap.com_tc~esi~uddi~content
Deployment of archive \usr\sap\patche\<...>.SCA --> uddiContent.sda for component sap.com/tc~esi~uddi~content aborted
Detailed message: 1. ASJ.dpl_ds.006193 Operation [update] of stand-alone module file [<path>\DEPLOYARCHIVES\uddiContent.sda] failed
-> Component [sap.com/tc~esi~uddi~content] has been originally deployed on content handler(s) with name(s):
- uddi_handler (provided by service "tc~esi~uddi~server~core~service") - the service has failed to start. CSN component for support is [BC-ESI-UDDI]
This handler is not functional on AS Java and the content deployment is not possible at the moment.
Create an OSS message in component: BC-ESI-UDDI for support.

In the deploy logs and in the default traces, the following errors are visible:

Service Runner [tc~esi~uddi~server~core~service]#Plain##
Software problem. Assertion failed. Caught and will re-throw as IllegalStateException.
[EXCEPTION]
//..

Failed to read schema document 'uddi_v3custody.xsd', because 'file' access is not allowed due to restriction set by the accessExternalSchema property.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:204)
at
//...

Service [tc~esi~uddi~server~core~service] start ================= ERROR =================
CSN Component [BC-ESI-UDDI], DC Name [sap.com/tc~esi~uddi~server~core~service]
com.sap.engine.frame.ServiceException: <--Localization failed: ResourceBundle='com.sap.engine.frame.ServiceResourceBundle', ID='UDDI Service initialization failed', Arguments: []--> : Can't find resource for bundle java.util.PropertyResourceBundle, key UDDI Service initialization failed
at com.sap.uddi.server.UddiCoreServiceFrame.start(UddiCoreServiceFrame.java:51)
at com.sap.engine.core.service630.container.ServiceRunner.startFrame(ServiceRunner.java:165)
at com.sap.engine.core.service630.container.ServiceRunner.startService(ServiceRunner.java:118)
at com.sap.engine.core.service630.container.ServiceRunner.run(ServiceRunner.java:65)
at com.sap.engine.frame.core.thread.Task.run(Task.java:73)
at com.sap.engine.core.thread.impl5.SingleThread.execute(SingleThread.java:178)
at com.sap.engine.core.thread.impl5.SingleThread.run(SingleThread.java:316)
Caused by: com.sap.uddi.server.UddiServiceException: RCM could not be initialized.
at com.sap.uddi.server.ServiceInitializer.initializeReplication(ServiceInitializer.java:178)
at com.sap.uddi.server.ServiceInitializer.initializeUddiService(ServiceInitializer.java:71)
at com.sap.uddi.server.UddiCoreServiceFrame.start(UddiCoreServiceFrame.java:47)
... 6 more
Caused by: java.lang.IllegalStateException: Uninitialized. (after rename).
at com.sap.uddi.server.replication.RCM.initialize(RCM.java:127)
at com.sap.uddi.server.ServiceInitializer.initializeReplication(ServiceInitializer.java:151)
... 8 more

• SAP NW AS JAVA 7.50
• SAP JVM 8.1 

SUM, upgrade, NW 7.50, SP19, UDDI, uddi_v3custody.xsd, accessExternalSchema property, Service initialization failed, IllegalStateException: Uninitialized, The following error or errors have occurred during the execution of the current step:Could not update components, sap.com/UDDI: Deployment of archive UDDI19_0-80000499.SCA for component sap.com/UDDI aborted, uddi_handler (provided by service "tc~esi~uddi~server~core~service") - the service has failed to start, solman, mii, ep, UDDI20_0-80000499.SCA, sp20 , KBA , BC-ESI-UDDI , UDDI Server , BC-UPG-TLS-TLJ , Upgrade tools for Java , BC-JAS-DPL , Deployment , Bug Filed