My environment is like this
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WebSphere [IBMJAVA7 7.0.9.10 cf071533.01][IBMJAVA71 7.1.3.10 cf071533.01]Platform 8.5.5.7 [ND 8.5.5.7 cf071533.01][HV 1.0.0.7 v10_1542.01][WXS 8.6.0.8 cf81524.11194957]
Host Operating System is AIX, version 7.1
Java version = 1.7.0, Java Runtime Version = pap6470sr9fp10-20150708_01 (SR9 FP10), Java Compiler = j9jit26, Java VM name = IBM J9 VM
was.install.root = /opt/IBM/WebSphere/AppServer
user.install.root = /opt/IBM/WebSphere/Profiles/DefaultAppSrv01
Java Home = /opt/IBM/WebSphere/AppServer/java_1.7_64/jre

– Unable to start the application and is failing with following errors...

8/29/16 13:50:11:264 CDT] 000000a9 webapp E com.ibm.ws.webcontainer.webapp.WebGroupImpl WebGroup SRVE0015E: Failure to initialize Web application Jenkins v2.19
[8/29/16 13:50:11:270 CDT] 000000da BootFailure E Failed to initialize Jenkins
hudson.util.HudsonFailedToLoad: java.lang.NullPointerException
at hudson.WebAppMain$3.run(WebAppMain.java:244)
Caused by: java.lang.NullPointerException
at com.ibm.ws.webcontainer.webapp.WebApp.getInitParameter(WebApp.java:2789)
at com.ibm.wsspi.webcontainer.facade.ServletContextFacade.getInitParameter(ServletContextFacade.java:264)
at jenkins.util.SystemProperties.tryGetValueFromContext(SystemProperties.java:320)
at jenkins.util.SystemProperties.getString(SystemProperties.java:119)
at jenkins.util.SystemProperties.getInteger(SystemProperties.java:256)
at jenkins.model.Jenkins.<init>(Jenkins.java:599)
at hudson.model.Hudson.<init>(Hudson.java:85)
at hudson.model.Hudson.<init>(Hudson.java:81)
at hudson.WebAppMain$3.run(WebAppMain.java:227)

[8/29/16 13:50:11:277 CDT] 000000a9 DeployedAppli W WSVR0206E: Module, jenkins.war, of application, jenkins_war.ear/deployments/jenkins_war, failed to start
[8/29/16 13:50:11:281 CDT] 000000a9 ApplicationMg W WSVR0101W: An error occurred starting, jenkins_war
[8/29/16 13:50:11:282 CDT] 000000a9 ApplicationMg A WSVR0217I: Stopping application: jenkins_war
[8/29/16 13:50:11:308 CDT] 000000a9 ApplicationMg A WSVR0220I: Application stopped: jenkins_war
[8/29/16 13:50:11:311 CDT] 000000a9 CompositionUn E WSVR0194E: Composition unit WebSphere:cuname=jenkins_war in BLA WebSphere:blaname=jenkins_war failed to start.
[8/29/16 13:50:11:312 CDT] 000000a9 MBeanHelper E Could not invoke an operation on object: WebSphere:name=ApplicationManager,process=server1,platform=proxy,node=CloudBurstNode_11472230251975,version=8.5.5.7,type=ApplicationManager,mbeanIdentifier=ApplicationManager,cell=CloudBurstCell_11472230251975,spec=1.0 because of an mbean exception: com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: Failed to load webapp: SRVE8111E: The application, jenkins_war, is trying to modify a cookie which matches a pattern in the restricted programmatic session cookies list [domain=*, name=JSESSIONID, path=/].

Thanks in advance..