WebLogic Exception error parsing descriptor in Web appplication Solution

If you use WebLogic to deploy a war project, some projects can be deployed, but some cannot. The following exception occurs.
The exception is as follows:
An error occurred during activation of changes, please see the log for details.
[Http: 101064] [webappmodule (oa_manager0: oa_manager0.3.war)] Error parsing descriptor in Web appplication "D:/09 projects/oa_manager0.3/oa_manager0.3.war" weblogic. application. moduleexception: unmarshaller failed at weblogic. servlet. internal. webappmodule. loaddescriptor (webappmodule. java: 758) at weblogic. servlet. internal. webappmodule. prepare (webappmodule. java: 260) at weblogic. application. internal. flow. modulelistenerinvoker. prepare (modulelistenerinvoker. java: 90) at weblogic. application. internal. flow. deploymentcallbackflow $1. next (deploymentcallbackflow. java: 318) at weblogic. application. utils. statemachinedriver. nextstate (statemachinedriver. java: 26) at weblogic. application. internal. flow. deploymentcallbackflow. prepare (deploymentcallbackflow. java: 53) at weblogic. application. internal. flow. deploymentcallbackflow. prepare (deploymentcallbackflow. java: 43) at weblogic. application. internal. basedeployment $1. next (basedeployment. java: 615) at weblogic. application. utils. statemachinedriver. nextstate (statemachinedriver. java: 26) at weblogic. application. internal. basedeployment. prepare (basedeployment. java: 236) at weblogic. application. internal. deploymentstatechecker. prepare (deploymentstatechecker. java: 147) at weblogic.deploy.internal.tar getserver. appcontainerinvoker. prepare (appcontainerinvoker. java: 61) at weblogic.deploy.internal.tar getserver. operations. activateoperation. createandpreparecontainer (activateoperation. java: 191) at weblogic.deploy.internal.tar getserver. operations. activateoperation. doprepare (activateoperation. java: 84) at weblogic.deploy.internal.tar getserver. operations. abstractoperation. prepare (abstractoperation. java: 197) at weblogic.deploy.internal.tar getserver. deploymentmanager. handledeploymentprepare (deploymentmanager. java: 724) at weblogic.deploy.internal.tar getserver. deploymentmanager. preparedeploymentlist (deploymentmanager. java: 1137) at weblogic.deploy.internal.tar getserver. deploymentmanager. handleprepare (deploymentmanager. java: 224) at weblogic.deploy.internal.tar getserver. deploymentservicedispatcher. prepare (deploymentservicedispatcher. java: 109) at weblogic.deploy.service.internal.tar getserver. deploymentreceivercallbackdeliverer. dopreparecallback (deploymentreceivercallbackdeliverer. java: 166) at weblogic.deploy.service.internal.tar getserver. deploymentreceivercallbackdeliverer. accesskey $100 (deploymentreceivercallbackdeliverer. java: 12) at weblogic.deploy.service.internal.tar getserver. deploymentreceivercallbackdeliverer $ 2.run( deploymentreceivercallbackdeliverer. java: 54) at weblogic. work. serverworkmanagerimpl $ workadapterimpl. run (serverworkmanagerimpl. java: 518) at weblogic.work.executethread.exe cute (executethread. java: 207) at weblogic. work. executethread. run (executethread. -Java: 179) caused by: COM. bea. XML. xmlexception: failed to load Java type corresponding to E = web-app @ http://java.sun.com/xml/ns/javaee at com. bea. staxb. runtime. internal. unmarshalresult. getpojobindingtype (unmarshalresult. java: 325) at com. bea. staxb. runtime. internal. unmarshalresult. determinetypeforglobalelement (unmarshalresult. java: 292) at com. bea. staxb. runtime. internal. unmarshalresult. determinetypeforglobalelement (unmarshalresult. java: 302) at com. bea. staxb. runtime. internal. unmarshalresult. determineroottype (unmarshalresult. java: 283) at com. bea. staxb. runtime. internal. unmarshalresult. unmarshaldocument (unmarshalresult. java: 153) at com. bea. staxb. runtime. internal. unmarshallerimpl. unmarshal (unmarshallerimpl. java: 65) at weblogic. descriptor. internal. marshallerfactory $1. createdescriptor (assumallerfactory. java: 138) at weblogic. descriptor. descriptormanager. createdescriptor (descriptormanager. java: 254) at weblogic. application. descriptor. abstractdescriptorloader. createdescriptor (abstractdescriptorloader. java: 359) at weblogic. application. descriptor. cachingdescriptorloader. supercreatedescriptor (cachingdescriptorloader. java: 166) at weblogic. application. descriptor. cachingdescriptorloader. access $000 (cachingdescriptorloader. java: 31) at weblogic. application. descriptor. cachingdescriptorloader $ iohelperimpl. parsexml (cachingdescriptorloader. java: 278) at weblogic. descriptor. descriptorcache. parsexml (descriptorcache. java: 324) at weblogic. application. descriptor. cachingdescriptorloader. createdescriptor (cachingdescriptorloader. java: 209) at weblogic. application. descriptor. abstractdescriptorloader. createdescriptor (abstractdescriptorloader. java: 328) at weblogic. application. descriptor. abstractdescriptorloader. getdescriptor (abstractdescriptorloader. java: 237) at weblogic. application. descriptor. abstractdescriptorloader. getrootdescriptorbean (abstractdescriptorloader. java: 217) at weblogic. servlet. internal. webappdescriptor. getwebappbean (webappdescriptor. java: 136) at weblogic. servlet. internal. webappmodule. loaddescriptor (webappmodule. java: 754 )... 24 more weblogic. application. moduleexception: unmarshaller failed
Failed to load Java type corresponding to E = web-app @ http://java.sun.com/xml/ns/javaee

 

Solution:

The problem occurs when the declaration part of the project's web. xml file turns out to be:

<Web-app version = "2.5"

Xmlns = "http://java.sun.com/xml/ns/javaee"

Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"

Xsi: schemalocation = "http://java.sun.com/xml/ns/javaee

Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd>

 

Changed:

<Web-app version = "2.4"

Xmlns = "http://java.sun.com/xml/ns/j2ee"

Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"

Xsi: schemalocation = "http://java.sun.com/xml/ns/j2ee

Http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd>

The problem can be solved.

 

Cause analysis:

WebLogic does not support the J2EE 2.5 version. If you use the 2.5 version, a parsing error (as shown above) occurs. Change it to version 2.4.