2590536 - Lumira Server 2.1 installation stuck at Undeploying Web Applications stage

When installing Lumira Server 2.1 as a new add-on on BI Platform 4.2 (see PAM for compatible versions), the installation has been stuck at "Undeploying Web Applications" stage for a long time (at least 30 minutes).

In the installation logs (e.g. C:\Program Files (x86)\SAP BusinessObjects\InstallData\logs\<timestamp>\setupengine.log, the following error message is recorded at the end, and no new entries have been written for a long time:

• 01:58:15.585 2018/01/17, 01:58:15: Undeploying with command: "C:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\wdeploy\wdeploy.bat" tomcat8 -Das_dir="C:\Program Files (x86)\SAP BusinessObjects\tomcat\" -DAPP=BOE undeploy
  ...
  ...
• 01:58:17.304 Moving 1 file to C:\Program Files (x86)\SAP BusinessObjects\tomcat\conf
  Processing C:\Program Files (x86)\SAP BusinessObjects\tomcat\conf\server.xml.old to C:\Program Files (x86)\SAP BusinessObjects\tomcat\conf\server.xml
  Loading stylesheet C:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\wdeploy\templates\tomcat_context_undeploy.xsl
  Warning:  org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
  Warning:  org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser: Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized.

In the tomcat webapps folder (e.g. C:\Program Files (x86)\SAP BusinessObjects\tomcat\webapps), you see the folder "BOE" is still present, which should have been removed by the "undeploy" operation triggered by the Lumira Server installer.

In the Windows Task Manager, you notice the "setupengine.exe" is consuming a steady amout of memory, with a little CPU activity. You'll also find another "cmd.exe" process with command line invoking the wdeploy.bat script (e.g. C:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\wdeploy\wdeploy.bat), this process is also consuming very little memory and CPU resource.

Note: this issue might also occur when running BI Platform service pack upgrade or patch update installation, the symptoms are the same as the above.

• SAP BusinessObjects Business Intelligence (BI) Platform 4.2 (the following are the versions compatible with Lumira Server 2.1 according to the PAM):
• SP03
• SP04, Patch 1 or above
• SP05
• SAP BusinessObjects Lumira Server 2.1
• Windows Server
• Bundled Tomcat 8 Application Server

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