Appian 17.2 : JBAS018014: Failed to parse XML descriptor "/opt/appian/appian/ear/suite.ear/web.war/WEB-INF/web.xml" at [1322,4]

Configured 17.2 environment with JBoss & Apache service. Referred URL : https://docs.appian.com/suite/help/17.2/Configuring_Apache_Web_Server_with_JBoss.html 

As per configuration steps, I added http method "CONNECT "in web.xml as it was missing. Path : Appian_Home/ear/suite.ear/web.war/WEB-INF/web.xml

After completing the configuration I was getting below error & unable to start JBoss service. 

To resolve this issue, I simply removed the http method "CONNECT" from web.xml & JBoss service started & working fine. 

My query is : I wanted to know whether I followed correct steps or not. On forum, it is not mentioned where to check HTTP methods are enabled or not while configuring JBoss.

Refer : https://docs.appian.com/suite/help/17.2/Configuring_Apache_Web_Server_with_JBoss.html#configure-jboss 

Error Log : 

Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS018014: Failed to parse XML descriptor "/opt/appian/appian/ear/suite.ear/web.war/WEB-INF/web.xml" at [1322,4]
at org.jboss.as.web.deployment.WebParsingDeploymentProcessor.deploy(WebParsingDeploymentProcessor.java:116)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:159) [jboss-as-server-7.5.0.Final-redhat-21.jar:7.5.0.Final-redhat-21]
... 5 more
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1322,4]
Message: Unexpected element '{java.sun.com/.../javaee}http_method' encountered
at org.jboss.metadata.parser.util.MetaDataElementParser.unexpectedElement(MetaDataElementParser.java:109)
at org.jboss.metadata.parser.servlet.WebResourceCollectionMetaDataParser.parse(WebResourceCollectionMetaDataParser.java:100)
at org.jboss.metadata.parser.servlet.SecurityConstraintMetaDataParser.parse(SecurityConstraintMetaDataParser.java:71)
at org.jboss.metadata.parser.servlet.WebCommonMetaDataParser.parse(WebCommonMetaDataParser.java:147)
at org.jboss.metadata.parser.servlet.WebMetaDataParser.parse(WebMetaDataParser.java:175)
at org.jboss.metadata.parser.servlet.WebMetaDataParser.parse(WebMetaDataParser.java:55)
at org.jboss.as.web.deployment.WebParsingDeploymentProcessor.deploy(WebParsingDeploymentProcessor.java:91)
... 6 more

14:18:00,600 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS014612: Operation ("deploy") failed - address: ([("deployment" => "suite.ear")]) - failure description: {"JBAS014671: Failed services" => {"jboss.deployment.subunit.\"suite.ear\".\"web.war\".PARSE" => "org.jboss.msc.service.StartException in service jboss.deployment.subunit.\"suite.ear\".\"web.war\".PARSE: JBAS018733: Failed to process phase PARSE of subdeployment \"web.war\" of deployment \"suite.ear\"
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS018014: Failed to parse XML descriptor \"/opt/appian/appian/ear/suite.ear/web.war/WEB-INF/web.xml\" at [1322,4]
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1322,4]
Message: Unexpected element '{java.sun.com/.../javaee}http_method' encountered"}}
14:18:00,639 INFO [org.jboss.as.server] (ServerService Thread Pool -- 30) JBAS015859: Deployed "appian-mysql-ds.xml" (runtime-name : "appian-mysql-ds.xml")
14:18:00,639 INFO [org.jboss.as.server] (ServerService Thread Pool -- 30) JBAS015859: Deployed "suite.ear" (runtime-name : "suite.ear")
14:18:00,650 INFO [org.jboss.as.controller] (Controller Boot Thread) JBAS014774: Service status report
JBAS014777: Services which failed to start: service jboss.deployment.subunit."suite.ear"."web.war".PARSE: org.jboss.msc.service.StartException in service jboss.deployment.subunit."suite.ear"."web.war".PARSE: JBAS018733: Failed to process phase PARSE of subdeployment "web.war" of deployment "suite.ear"

14:18:00,671 INFO [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on 127.0.0.1:9990/management
14:18:00,672 INFO [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9990
14:18:00,672 ERROR [org.jboss.as] (Controller Boot Thread) JBAS015875: JBoss EAP 6.4.0.GA (AS 7.5.0.Final-redhat-21) started (with errors) in 10522ms - Started 237 of 281 services (7 services failed or missing dependencies, 66 services are lazy, passive or on-demand)
14:18:00,898 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-3) JBAS010409: Unbound data source [jdbc/PrimaryDS]
14:18:01,015 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015858: Undeployed "appian-mysql-ds.xml" (runtime-name: "appian-mysql-ds.xml")
14:18:01,016 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015858: Undeployed "suite.ear" (runtime-name: "suite.ear")
14:18:01,016 INFO [org.jboss.as.controller] (DeploymentScanner-threads - 2) JBAS014774: Service status report
JBAS014777: Services which failed to start: service jboss.deployment.subunit."suite.ear"."web.war".PARSE