I added some mib definitions but no system definition. Opennms appeared to be
running fine but no data collection. Opennms should not have allowed collectd to
complete it startup after such an error, didn't collect data after this anyway.

OpenNMS.Collectd : running

Even though

2005-04-28 21:20:42,940 FATAL [main] SnmpCollector: initialize: Failed to load
data collection configuration
ValidationException: instance is a required field.;

• location of error: XPATH:
  datacollection-config/snmp-collection/groups/group/mibObj
  at org.exolab.castor.xml.FieldValidator.validate(Unknown Source)
  at org.exolab.castor.xml.util.XMLClassDescriptorImpl.validate(Unknown
  Source)
  at org.exolab.castor.xml.Validator.validate(Unknown Source)
  at org.exolab.castor.xml.FieldValidator.validate(Unknown Source)
  at org.exolab.castor.xml.util.XMLClassDescriptorImpl.validate(Unknown
  Source)
  at org.exolab.castor.xml.Validator.validate(Unknown Source)
  at org.exolab.castor.xml.FieldValidator.validate(Unknown Source)
  at org.exolab.castor.xml.util.XMLClassDescriptorImpl.validate(Unknown
  Source)
  at org.exolab.castor.xml.Validator.validate(Unknown Source)
  at org.exolab.castor.xml.FieldValidator.validate(Unknown Source)
  at org.exolab.castor.xml.util.XMLClassDescriptorImpl.validate(Unknown
  Source)
  at org.exolab.castor.xml.Validator.validate(Unknown Source)
  at org.exolab.castor.xml.FieldValidator.validate(Unknown Source)
  at org.exolab.castor.xml.util.XMLClassDescriptorImpl.validate(Unknown
  Source)
  at org.exolab.castor.xml.Validator.validate(Unknown Source)
  at org.exolab.castor.xml.UnmarshalHandler.endElement(Unknown Source)
  at
  org.apache.xerces.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:552)
  at
  org.apache.xerces.impl.XMLNamespaceBinder.endElement(XMLNamespaceBinder.java:646)
  at
  org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2978)
  at
  org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:918)
  at
  org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.handleEndElement(XMLDocumentFragmentScannerImpl.java:1145)
  at
  org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:988)
  at
  org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1446)
  at
  org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:333)
  at
  org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:529)
  at
  org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:585)
  at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:147)
  at
  org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1148)
  at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.<init>(DataCollectionConfigFactory.java:121)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.init(DataCollectionConfigFactory.java:190)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.reload(DataCollectionConfigFactory.java:209)
  at
  org.opennms.netmgt.collectd.SnmpCollector.initialize(SnmpCollector.java:290)
  at
  org.opennms.netmgt.collectd.Collectd.instantiateCollectors(Collectd.java:317)
  at org.opennms.netmgt.collectd.Collectd.init(Collectd.java:167)
  at org.opennms.netmgt.collectd.jmx.Collectd.init(Collectd.java:37)
  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:324)
  at mx4j.MBeanIntrospector.invoke(MBeanIntrospector.java:214)
  at mx4j.MBeanServerImpl.invoke(MBeanServerImpl.java:158)
  at org.opennms.netmgt.vmmgr.Manager.start(Manager.java:208)
  at org.opennms.netmgt.vmmgr.Manager.main(Manager.java:436)
  2005-04-28 21:20:42,943 WARN [main] Collectd: init: Failed to load collector
  org.opennms.netmgt.collectd.SnmpCollector for service
  SNMPjava.lang.reflect.UndeclaredThrowableException
  at
  org.opennms.netmgt.collectd.SnmpCollector.initialize(SnmpCollector.java:295)
  at
  org.opennms.netmgt.collectd.Collectd.instantiateCollectors(Collectd.java:317)
  at org.opennms.netmgt.collectd.Collectd.init(Collectd.java:167)
  at org.opennms.netmgt.collectd.jmx.Collectd.init(Collectd.java:37)
  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:324)
  at mx4j.MBeanIntrospector.invoke(MBeanIntrospector.java:214)
  at mx4j.MBeanServerImpl.invoke(MBeanServerImpl.java:158)
  at org.opennms.netmgt.vmmgr.Manager.start(Manager.java:208)
  at org.opennms.netmgt.vmmgr.Manager.main(Manager.java:436)
  Caused by: ValidationException: instance is a required field.;

• location of error: XPATH:
  datacollection-config/snmp-collection/groups/group/mibObj{file: [not available];
  line: 730; column: 25} at
  org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at org.exolab.castor.xml.Unmarshaller.unmarshal(Unknown Source)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.<init>(DataCollectionConfigFactory.java:121)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.init(DataCollectionConfigFactory.java:190)
  at
  org.opennms.netmgt.config.DataCollectionConfigFactory.reload(DataCollectionConfigFactory.java:209)
  at
  org.opennms.netmgt.collectd.SnmpCollector.initialize(SnmpCollector.java:290)
  ... 11 more
  2005-04-28 21:20:42,943 DEBUG [main] Collectd: start: Testing database connection