Everytime we deploy Hudson.war onto Oracle Application Server 10.1.3.5 we get following exception in the logs:
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WARNING: DeployerRunnable.run java.lang.NoSuchMethodError: addImmutableTypeoracle.oc4j.admin.internal.DeployerException: java.lang.NoSuchMethodError: addImmutableType
at oracle.oc4j.admin.internal.DeployerBase.execute(DeployerBase.java:146)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.OC4JDeployerRunnable.doRun(OC4JDeployerRunnable.java:52)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.DeployerRunnable.run(DeployerRunnable.java:81)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NoSuchMethodError: addImmutableType
at hudson.util.XStream2.init(XStream2.java:93)
at hudson.util.XStream2.<init>(XStream2.java:59)
at hudson.model.Hudson.<clinit>(Hudson.java:3550)
at hudson.WebAppMain.installLogger(WebAppMain.java:259)
at hudson.WebAppMain.contextInitialized(WebAppMain.java:116)
at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1278)
at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
at com.evermind.server.Application.getHttpApplication(Application.java:592)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
at com.evermind.server.http.HttpSite.addHttpApplication(HttpSite.java:1833)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:304)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:120)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:93)
at oracle.oc4j.admin.internal.ApplicationDeployer.bindWebApp(ApplicationDeployer.java:825)
at oracle.oc4j.admin.internal.ApplicationDeployer.doDeploy(ApplicationDeployer.java:276)
at oracle.oc4j.admin.internal.DeployerBase.execute(DeployerBase.java:100)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.OC4JDeployerRunnable.doRun(OC4JDeployerRunnable.java:53)
... 3 more
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Sometimes the deployment goes through fine... sometimes it FAILs to deploy hudson giving following error in logs:

SEVERE: Failed to initialize Hudson
java.lang.NoSuchMethodError: addImmutableType
at hudson.util.XStream2.init(XStream2.java:93)
at hudson.util.XStream2.<init>(XStream2.java:59)
at hudson.model.Hudson.<clinit>(Hudson.java:3550)
at hudson.WebAppMain.installLogger(WebAppMain.java:259)
at hudson.WebAppMain.contextInitialized(WebAppMain.java:116)
at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1278)
at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
at com.evermind.server.Application.getHttpApplication(Application.java:592)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
at com.evermind.server.http.HttpSite.addHttpApplication(HttpSite.java:1833)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:304)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:120)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:93)
at oracle.oc4j.admin.internal.ApplicationDeployer.bindWebApp(ApplicationDeployer.java:825)
at oracle.oc4j.admin.internal.ApplicationDeployer.doDeploy(ApplicationDeployer.java:276)
at oracle.oc4j.admin.internal.DeployerBase.execute(DeployerBase.java:100)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.OC4JDeployerRunnable.doRun(OC4JDeployerRunnable.java:53)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.DeployerRunnable.run(DeployerRunnable.java:81)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:619)
10/06/14 17:54:28 SEVERE: ProgressObjectImpl.reportError addImmutableTypeoracle.oc4j.admin.jmx.shared.exceptions.InternalException: addImmutableType
at oracle.oc4j.admin.jmx.shared.deploy.NotificationUserData.<init>(NotificationUserData.java:107)
at oracle.oc4j.admin.internal.Notifier.reportError(Notifier.java:429)
at oracle.oc4j.admin.internal.DeployerBase.execute(DeployerBase.java:143)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.OC4JDeployerRunnable.doRun(OC4JDeployerRunnable.java:52)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.DeployerRunnable.run(DeployerRunnable.java:81)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NoSuchMethodError: addImmutableType
at hudson.util.XStream2.init(XStream2.java:93)
at hudson.util.XStream2.<init>(XStream2.java:59)
at hudson.model.Hudson.<clinit>(Hudson.java:3550)
at hudson.WebAppMain.installLogger(WebAppMain.java:259)
at hudson.WebAppMain.contextInitialized(WebAppMain.java:116)
at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1278)
at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
at com.evermind.server.Application.getHttpApplication(Application.java:592)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
at com.evermind.server.http.HttpSite.addHttpApplication(HttpSite.java:1833)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:304)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:120)
at oracle.oc4j.admin.internal.WebApplicationBinder.bindWebApp(WebApplicationBinder.java:93)
at oracle.oc4j.admin.internal.ApplicationDeployer.bindWebApp(ApplicationDeployer.java:825)
at oracle.oc4j.admin.internal.ApplicationDeployer.doDeploy(ApplicationDeployer.java:276)
at oracle.oc4j.admin.internal.DeployerBase.execute(DeployerBase.java:100)
at oracle.oc4j.admin.jmx.server.mbeans.deploy.OC4JDeployerRunnable.doRun(OC4JDeployerRunnable.java:53)
... 3 more