Build activity broken due to NPE in CurrentlyBuildingJsonDecorator

2015-01-16 02:36:41,792 INFO [http-bio-8085-exec-200] [AccessLogFilter] xxx GET https://jira-bamboo.internal.atlassian.com/build/admin/ajax/getDashboardSummary.action?_=1421375706593 1165166kb
2015-01-16 02:36:41,795 ERROR [http-bio-8085-exec-200] [ExceptionMappingInterceptor] null
Caught an Ognl exception while getting property jsonObject - Class: ognl.OgnlRuntime
File: OgnlRuntime.java
Method: getMethodValue
Line: 1456 - ognl/OgnlRuntime.java:1456:-1
	at com.opensymphony.xwork2.ognl.OgnlValueStack.handleOtherException(OgnlValueStack.java:264)
	at com.opensymphony.xwork2.ognl.OgnlValueStack.findValue(OgnlValueStack.java:241)
	at com.opensymphony.webwork.dispatcher.json.JSONResult.getJSONObject(JSONResult.java:172)
	at com.opensymphony.webwork.dispatcher.json.JSONResult.execute(JSONResult.java:137)
	at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
	at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:168)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.validateWorkflow(BambooWorkflowInterceptor.java:54)
...
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: Caught an Ognl exception while getting property jsonObject - Class: ognl.OgnlRuntime
File: OgnlRuntime.java
Method: getMethodValue
Line: 1456 - ognl/OgnlRuntime.java:1456:-1
	at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.getProperty(CompoundRootAccessor.java:143)
	at ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2317)
	at ognl.ASTProperty.getValueBody(ASTProperty.java:114)
	at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
	at ognl.SimpleNode.getValue(SimpleNode.java:258)
	at ognl.Ognl.getValue(Ognl.java:494)
	at ognl.Ognl.getValue(Ognl.java:458)
	at com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:251)
	at com.opensymphony.xwork2.ognl.OgnlValueStack.getValueUsingOgnl(OgnlValueStack.java:292)
	at com.opensymphony.xwork2.ognl.OgnlValueStack.tryFindValue(OgnlValueStack.java:275)
	at com.opensymphony.xwork2.ognl.OgnlValueStack.tryFindValueWhenExpressionIsNotNull(OgnlValueStack.java:257)
	at com.opensymphony.xwork2.ognl.OgnlValueStack.findValue(OgnlValueStack.java:237)
	... 243 more
Caused by: ognl.OgnlException: jsonObject [java.lang.NullPointerException]
	at ognl.OgnlRuntime.getMethodValue(OgnlRuntime.java:1456)
	at ognl.ObjectPropertyAccessor.getPossibleProperty(ObjectPropertyAccessor.java:60)
	at ognl.ObjectPropertyAccessor.getProperty(ObjectPropertyAccessor.java:147)
	at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.getProperty(ObjectAccessor.java:17)
	at ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2317)
	at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.getProperty(CompoundRootAccessor.java:138)
	... 254 more
Caused by: java.lang.NullPointerException
	at com.atlassian.bamboo.ww2.actions.build.CurrentlyBuildingJsonDecorator.<init>(CurrentlyBuildingJsonDecorator.java:44)
	at com.atlassian.bamboo.ww2.actions.build.BuildJsonProviderAction.getJsonObject(BuildJsonProviderAction.java:170)
	at com.atlassian.bamboo.ww2.actions.build.DashboardSummaryAction.getJsonObject(DashboardSummaryAction.java:29)
	at sun.reflect.GeneratedMethodAccessor5283.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:891)
	at ognl.OgnlRuntime.getMethodValue(OgnlRuntime.java:1454)
	... 259 more