I am unable to install findbugs and checkstyle plug-ins. I get the following errors after manually uploading the findbugs and checkstyle plug-ins and restarting WebLogic server.

Findbugs:

28-Aug-2013 8:37:45 AM org.apache.commons.digester3.Digester getParser
SEVERE: Digester.getParser:
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:448)
at org.apache.commons.digester3.Digester.getFactory(Digester.java:439)
at org.apache.commons.digester3.Digester.getParser(Digester.java:652)
at org.apache.commons.digester3.Digester.getXMLReader(Digester.java:799)

at org.apache.commons.digester3.Digester.parse(Digester.java:1642)
at org.apache.commons.digester3.Digester.parse(Digester.java:1701)
at hudson.plugins.findbugs.FindBugsMessages.parse(FindBugsMessages.java:108)
at hudson.plugins.findbugs.FindBugsMessages.loadMessages(FindBugsMessages.java:71)
at hudson.plugins.findbugs.FindBugsMessages.initialize(FindBugsMessages.java:53)
at hudson.plugins.findbugs.FindBugsPlugin.start(FindBugsPlugin.java:28)
at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:379)
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:368)
at hudson.PluginManager$2$1$1.run(PluginManager.java:333)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$7.runTask(Jenkins.java:888)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
28-Aug-2013 8:37:45 AM jenkins.InitReactorRunner$1 onTaskFailed
SEVERE: Failed Loading plugin findbugs
hudson.util.IOException2: Failed to initialize
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:371)
at hudson.PluginManager$2$1$1.run(PluginManager.java:333)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$7.runTask(Jenkins.java:888)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at org.apache.commons.digester3.Digester.getXMLReader(Digester.java:799)

at org.apache.commons.digester3.Digester.parse(Digester.java:1642)
at org.apache.commons.digester3.Digester.parse(Digester.java:1701)
at hudson.plugins.findbugs.FindBugsMessages.parse(FindBugsMessages.java:108)
at hudson.plugins.findbugs.FindBugsMessages.loadMessages(FindBugsMessages.java:71)
at hudson.plugins.findbugs.FindBugsMessages.initialize(FindBugsMessages.java:53)
at hudson.plugins.findbugs.FindBugsPlugin.start(FindBugsPlugin.java:28)
at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:379)
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:368)
... 9 more

Checkstyle:

28-Aug-2013 10:50:53 AM org.apache.commons.digester3.Digester getParser
SEVERE: Digester.getParser:
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:448)
at org.apache.commons.digester3.Digester.getFactory(Digester.java:439)
at org.apache.commons.digester3.Digester.getParser(Digester.java:652)
at org.apache.commons.digester3.Digester.getXMLReader(Digester.java:799)
at org.apache.commons.digester3.Digester.parse(Digester.java:1642)
at org.apache.commons.digester3.Digester.parse(Digester.java:1701)
at hudson.plugins.checkstyle.rules.CheckStyleRules.initialize(CheckStyleRules.java:60)
at hudson.plugins.checkstyle.CheckStylePlugin.start(CheckStylePlugin.java:23)
at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:379)
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:368)
at hudson.PluginManager$2$1$1.run(PluginManager.java:333)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$7.runTask(Jenkins.java:888)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
28-Aug-2013 10:50:53 AM jenkins.InitReactorRunner$1 onTaskFailed
SEVERE: Failed Loading plugin checkstyle
hudson.util.IOException2: Failed to initialize
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:371)
at hudson.PluginManager$2$1$1.run(PluginManager.java:333)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$7.runTask(Jenkins.java:888)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at org.apache.commons.digester3.Digester.getXMLReader(Digester.java:799)
at org.apache.commons.digester3.Digester.parse(Digester.java:1642)
at org.apache.commons.digester3.Digester.parse(Digester.java:1701)
at hudson.plugins.checkstyle.rules.CheckStyleRules.initialize(CheckStyleRules.java:60)
at hudson.plugins.checkstyle.CheckStylePlugin.start(CheckStylePlugin.java:23)
at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:379)
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:368)
... 9 more

I have tried re-installing latest version of analysis-core and findbugs, but still getting the same results.

Any help would be appreciated.