Maven style job runs on slave with this Maven command:

mvn clean deploy findbugs:findbugs

It has been working fine until recently this error popping up:

[INFO] [findbugs:findbugs

]
[INFO] ****** FindBugsMojo execute *******
[INFO] canGenerate is true
[INFO] ****** FindBugsMojo executeFindbugs *******
[INFO] Temp File is /export1/cruise/jenkins/workspace/offheap-store_trunk_publisher/trunk/target/findbugsTemp.xml
[INFO] Fork Value is true
[java] Warnings generated: 4
[INFO] xmlOutput is true
[FINDBUGS] Successfully parsed file /export1/cruise/jenkins/workspace/offheap-store_trunk_publisher/trunk/target/findbugsXml.xml of module Terracotta Off-Heap Store with 4 warnings.
[JENKINS] Archiving /export1/cruise/jenkins/workspace/offheap-store_trunk_publisher/trunk/pom.xml to /export1/cruise/jenkins/jobs/offheap-store_trunk_publisher/modules/com.terracottatech$offheap-store/builds/2011-09-08_00-00-48/archive/com.terracottatech/offheap-store/1.0.5-SNAPSHOT/offheap-store-1.0.5-SNAPSHOT.pom
[JENKINS] Archiving /export1/cruise/jenkins/workspace/offheap-store_trunk_publisher/trunk/target/offheap-store-1.0.5-SNAPSHOT.jar to /export1/cruise/jenkins/jobs/offheap-store_trunk_publisher/modules/com.terracottatech$offheap-store/builds/2011-09-08_00-00-48/archive/com.terracottatech/offheap-store/1.0.5-SNAPSHOT/offheap-store-1.0.5-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
at hudson.plugins.analysis.core.BuildHistory.getReferenceAction(BuildHistory.java:72)
at hudson.plugins.analysis.core.BuildHistory.getReferenceAnnotations(BuildHistory.java:57)
at hudson.plugins.analysis.core.BuildResult.initialize(BuildResult.java:254)
at hudson.plugins.analysis.core.BuildResult.(BuildResult.java:218)
at hudson.plugins.findbugs.FindBugsResult.(FindBugsResult.java:40)
at hudson.plugins.findbugs.FindBugsReporterResult.(FindBugsReporterResult.java:28)
at hudson.plugins.findbugs.FindBugsReporter.createResult(FindBugsReporter.java:175)
at hudson.plugins.findbugs.FindBugsReporter.createResult(FindBugsReporter.java:32)
at hudson.plugins.analysis.core.HealthAwareReporter.registerResults(HealthAwareReporter.java:269)
at hudson.plugins.analysis.core.HealthAwareReporter.access$000(HealthAwareReporter.java:56)
at hudson.plugins.analysis.core.HealthAwareReporter$1.call(HealthAwareReporter.java:258)
at hudson.plugins.analysis.core.HealthAwareReporter$1.call(HealthAwareReporter.java:256)
at hudson.maven.MavenBuild$ProxyImpl.execute(MavenBuild.java:394)
at hudson.maven.MavenBuild$ProxyImpl2.execute(MavenBuild.java:467)
at sun.reflect.GeneratedMethodAccessor282.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at hudson.model.Executor$1.call(Executor.java:514)
at hudson.util.InterceptingProxy$1.invoke(InterceptingProxy.java:23)
at $Proxy33.execute(Unknown Source)
at sun.reflect.GeneratedMethodAccessor420.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:274)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:255)
at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:215)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:287)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)