3462327 - Deployment failed while upgrading environment to 2211.21 or later because of an error associated to Tomcat configuration

Deployment failed while upgrading to 2211.21 as service pods are backing off and restarting due to the error "Unable to load server configuration from [/opt/aspects/backoffice/tomcat/conf/server.xml]" 

Error seen from logs looks like this:

i) level":"SEVERE","loggerName":"org.apache.catalina.connector.Connector","threadId":1,"threadPriority":5,"message":"Protocol handler instantiation failed","contextMap":{"sourceClassName":"org.apache.catalina.connector.Connector","sourceMethodName":"<init>"},"thrown":{"localizedMessage":"org.apache.coyote.http11.Http11Protocol","message":"org.apache.coyote.http11.Http11Protocol","name":"java.lang.ClassNotFoundException","extendedStackTrace":[{"class":"java.net.URLClassLoader","method":"findClass","file":"URLClassLoader.java","line":445},{"class":"java.lang.ClassLoader","method":"loadClass","file":"ClassLoader.java","line":592},{"class":"java.lang.ClassLoader","method":"loadClass","file":"ClassLoader.java","line":525},{"class":"java.lang.Class","method":"forName0","file":"Class.java","line":-2},{"class":"java.lang.Class","method":"forName","file":"Class.java","line":375},{"class":"org.apache.coyote.ProtocolHandler","method":"create","file":"ProtocolHandler.java","line":273},{"class":"org.apache.catalina.connector.Connector","method":"<init>","file":"Connector.java","line":88},{"class":"org.apache.catalina.startup.ConnectorCreateRule","method":"begin","file":"ConnectorCreateRule.java","line":62},{"class":"org.apache.tomcat.util.digester.Digester","method":"startElement","file":"Digester.java","line":1277},{"class":"com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser","method":"startElement","file":"AbstractSAXParser.java","line":518},{"class":"com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser","method":"emptyElement","file":"AbstractXMLDocumentParser.java","line":183},{"class":"com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl","method":"scanStartElement","file":"XMLDocumentFragmentScannerImpl.java","line":1387},{"class":"com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver","method":"next","file":"XMLDocumentFragmentScannerImpl.java","line":2726},

{"origin":"catalina","timeMillis":1714127058851,"thread":"main","level":"WARNING","loggerName":"org.apache.catalina.startup.Catalina","threadId":1,"threadPriority":5,"message":"Unable to load server configuration from [/opt/aspects/backoffice/tomcat/conf/server.xml]","contextMap":{"sourceClassName":"org.apache.catalina.startup.Catalina","sourceMethodName":"parseServerXml"},"thrown":{"localizedMessage":"Error at line [45] column [56]: [Cannot invoke \"Object.getClass()\" because the return value of \"org.apache.catalina.connector.Connector.getProtocolHandler()\" is null]","message":"Error at line [45] column [56]: [Cannot invoke \"Object.getClass()\" because the return value of \"org.apache.catalina.connector.Connector.getProtocolHandler()\" is null]","name":"org.xml.sax.SAXParseException","cause":{"localizedMessage":"Cannot invoke \"Object.getClass()\" because the return value of \"org.apache.catalina.connector.Connector.getProtocolHandler()\" is null","message":"Cannot invoke \"Object.getClass()\" because the return value of \"org.apache.catalina.connector.Connector.getProtocolHandler()\" is null","name":"java.lang.NullPointerException","extendedStackTrace":[{"class":"org.apache.catalina.startup.ConnectorCreateRule","method":"setExecutor","file":"ConnectorCreateRule.java","line":95},{"class":"org.apache.catalina.startup.ConnectorCreateRule","method":"begin","file":"ConnectorCreateRule.java","line":64},{"class":"org.apache.tomcat.util.digester.Digester","method":"startElement","file":"Digester.java","line":1277},{"class":"com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser","method":"startElement","file":"AbstractSAXParser.java","line":518},{"class":"com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser","method":"emptyElement","file":"AbstractXMLDocumentParser.java","line":183},{"class":"com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl","method":"scanStartElement","file":"XMLDocumentFragmentScannerImpl.java","line":1387},{"class":"com.sun.org.apache ... }

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apache, eol, tomcat, tomcat end of life, 8.5, 9 , deployment failure , KBA , CEC-SCC-CLA-DEP , Deployments , Problem