Metacat

I got an exception when i started metacat. However, it seems that metacat still can work.

SEVERE: /127.0.0.1:5701 [DataONE] null
java.lang.RuntimeException
at edu.ucsb.nceas.metacat.dataone.hazelcast.SystemMetadataMap.load(SystemMetadataMap.java:70)
at edu.ucsb.nceas.metacat.dataone.hazelcast.SystemMetadataMap.loadAll(SystemMetadataMap.java:79)
at com.hazelcast.impl.concurrentmap.MapStoreWrapper.loadAll(MapStoreWrapper.java:148)
at com.hazelcast.impl.FactoryImpl.loadKeys(FactoryImpl.java:586)
at com.hazelcast.impl.FactoryImpl.checkInitialization(FactoryImpl.java:568)
at com.hazelcast.impl.FactoryImpl.getOrCreateProxyByName(FactoryImpl.java:522)
at com.hazelcast.impl.FactoryImpl.getMap(FactoryImpl.java:490)
at com.hazelcast.impl.FactoryImpl$HazelcastInstanceProxy.getMap(FactoryImpl.java:224)
at com.hazelcast.core.Hazelcast.getMap(Hazelcast.java:140)
at edu.ucsb.nceas.metacat.dataone.hazelcast.HazelcastService.init(HazelcastService.java:195)
at edu.ucsb.nceas.metacat.dataone.hazelcast.HazelcastService.<init>(HazelcastService.java:121)
at edu.ucsb.nceas.metacat.dataone.hazelcast.HazelcastService.getInstance(HazelcastService.java:141)
at edu.ucsb.nceas.metacat.MetaCatServlet.initSecondHalf(MetaCatServlet.java:438)
at edu.ucsb.nceas.metacat.MetaCatServlet.init(MetaCatServlet.java:310)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4387)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4700)
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:546)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:701)
at org.apache.catalina.startup.Catalina.start(Catalina.java:585)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
at java.math.BigInteger.<init>(BigInteger.java:270)
at java.math.BigInteger.<init>(BigInteger.java:447)
at edu.ucsb.nceas.metacat.IdentifierManager.getSystemMetadata(IdentifierManager.java:276)
at edu.ucsb.nceas.metacat.dataone.hazelcast.SystemMetadataMap.load(SystemMetadataMap.java:63)
... 39 more