I upgraded Jenkins from version 1.590 to to 1.6.0.9.3 on Red 6.2 ( Santiago) was fine but after when i went to upgrade the plugins (manage Jenkins -> Manage Plugins - Updates ) i started getting error

I have the following Java: setting
*Using CATALINA_BASE: /app/apache-tomcat
Using CATALINA_HOME: /app/apache-tomcat
Using CATALINA_TMPDIR: /app/apache-tomcat/temp
Using JRE_HOME: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.55.b14.x86_64/jre
Using CLASSPATH: /app/apache-tomcat/bin/bootstrap.jar*

Here is the error message from Catalina.out
Sep 22, 2015 6:21:26 PM org.apache.catalina.core.StandardContext start
SEVERE: Error in resourceStart()
Sep 22, 2015 6:21:26 PM org.apache.catalina.core.StandardContext start
SEVERE: Error getConfigured
Sep 22, 2015 6:21:26 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/manager] startup failed due to previous errors
Sep 22, 2015 6:21:26 PM org.apache.catalina.core.StandardContext stop
INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager] has not been started
Sep 22, 2015 6:21:26 PM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor host-manager.xml
Sep 22, 2015 6:21:26 PM org.apache.catalina.core.StandardContext resourcesStart
SEVERE: Error starting static Resources
java.lang.IllegalArgumentException: Document base /app/apache-tomcat/webapps/host-manager does not exist or is not a readable directory
at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:142)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4324)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4493)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)