there is a mismatch in hardwired jmx-collection names, that cause jmx-datacollection to fail.

Quote from Christopher L. Cousins <clc-opennms@sparf.net>:

"I ran into this the other day. The problem is that the Jsr160 collector
is looking for a collection named 'default' instead of 'jsr160' when
creating the RRD. As a quick fix, copy the jsr160 'jmx-collection' in
jmx-datacollection-config.xml and change the name to 'default'. You
must have both, jsr160 and default in the file."

BTW: Why are these names hardwired in the code at all?

To reproduce:

capsd-configuration.xml :
-----------------------------------------------------------------------
...
<protocol-plugin protocol="jmx-test" class-name="org.opennms.netmgt.capsd.plugins.Jsr160Plugin" scan="on" user-defined="false">
<property key="port" value="9003"/>
<property key="type" value="default"/>
<property key="protocol" value="rmi"/>
<property key="urlPath" value="/jmxrmi"/>
<property key="retry" value="2"/>
<property key="timeout" value="2000"/>
</protocol-plugin>
...

collectd-configuration.xml:
-----------------------------------------------------------------------
<?xml version="1.0"?>
<?castor class-name="org.opennms.netmgt.collectd.CollectdConfiguration"?>
<collectd-configuration
threads="50">

<package name="example1">
<filter>IPADDR != '0.0.0.0'</filter>
<include-range begin="1.1.1.1" end="254.254.254.254"/>

<service name="SNMP" interval="300000" user-defined="false" status="on">
<parameter key="collection" value="default"/>
</service>

</package>

<package name="jvm">
<filter>IPADDR != '0.0.0.0'</filter>
<include-range begin="0.0.0.0" end="255.255.255.255"/>
<include-url>file:/opt/opennms/etc/includes/collection</include-url>

...

<service name="jmx-test" interval="300000" user-defined="false" status="on">
<parameter key="port" value="9003"/>
<parameter key="retry" value="2"/>
<parameter key="timeout" value="3000"/>
<parameter key="protocol" value="rmi"/>
<parameter key="urlPath" value="/jmxrmi"/>
<parameter key="ds-name" value="jmx"/>
<parameter key="friendly-name" value="jmx-test"/>
</service>

...
<collector service="jmx-test" class-name="org.opennms.netmgt.collectd.Jsr160Collector"/>

...

</collectd-configuration>

jmx-datacollection-config:

----------------------------------------------------------------------- <jmx-datacollection-config rrdRepository="/opt/opennms/share/rrd/snmp/">
<jmx-collection name="jsr160" maxVarsPerPdu="50">
<rrd step="300">
<rra>RRA:AVERAGE:0.5:1:8928</rra>
<rra>RRA:AVERAGE:0.5:12:8784</rra>
<rra>RRA:MIN:0.5:12:8784</rra>
<rra>RRA:MAX:0.5:12:8784</rra>
</rrd>

<mbeans>

<mbean name="Java" objectname="java.lang:type=OperatingSystem">
<attrib name="SystemLoadAverage" alias="jloadavg" type="gauge"/>
<attrib name="FreeSwapSpaceSize" alias="jfreeswap" type="gauge"/>
<attrib name="MaxFileDescriptorCount" alias="jmaxfile" type="gauge"/>
<attrib name="OpenFileDescriptorCount" alias="jopenfile" type="gauge"/>
<attrib name="CacheSize" alias="jcachemem" type="gauge"/>
<attrib name="OpenSessionCount" alias="jopensess" type="gauge"/>
</mbean>

</mbeans>
</jmx-collection>
</jmx-datacollection-config>

Collection throws exception:

2008-04-29 10:52:18,493 INFO [CollectdScheduler-50 Pool-fiber10] RrdUtils: createRRD: creating RRD file /opt/opennms/share/rrd/snmp/214/jmx-test/jopenfile.jrb
2008-04-29 10:52:18,493 ERROR [CollectdScheduler-50 Pool-fiber10] RrdUtils: createRRD: An error occured creating rrdfile /opt/opennms/share/rrd/snmp/214/jmx-test/jopenfile.jrb: org.jrobin.core.RrdException: Invalid heartbeat, must be positive: -2
org.jrobin.core.RrdException: Invalid heartbeat, must be positive: -2
at org.jrobin.core.DsDef.validate(DsDef.java:146)
at org.jrobin.core.DsDef.<init>(DsDef.java:83)
at org.jrobin.core.RrdDef.addDatasource(RrdDef.java:230)
at org.opennms.netmgt.rrd.jrobin.JRobinRrdStrategy.createDefinition(JRobinRrdStrategy.java:105)
at org.opennms.netmgt.rrd.QueuingRrdStrategy.createDefinition(QueuingRrdStrategy.java:732)
at org.opennms.netmgt.rrd.RrdUtils.createRRD(RrdUtils.java:193)
at org.opennms.netmgt.collectd.PersistOperationBuilder.commit(PersistOperationBuilder.java:110)
at org.opennms.netmgt.collectd.BasePersister.commitBuilder(BasePersister.java:72)
at org.opennms.netmgt.collectd.OneToOnePersister.completeAttribute(OneToOnePersister.java:57)
at org.opennms.netmgt.collectd.AbstractCollectionAttribute.visit(AbstractCollectionAttribute.java:65)
at org.opennms.netmgt.collectd.AttributeGroup.visit(AttributeGroup.java:75)
at org.opennms.netmgt.collectd.AbstractCollectionResource.visit(AbstractCollectionResource.java:103)
at org.opennms.netmgt.collectd.JMXCollector$JMXCollectionSet.visit(JMXCollector.java:913)
at org.opennms.netmgt.collectd.CollectableService.doCollection(CollectableService.java:354)
at org.opennms.netmgt.collectd.CollectableService.run(CollectableService.java:296)
at org.opennms.netmgt.scheduler.LegacyScheduler$1.run(LegacyScheduler.java:292)
at org.opennms.core.concurrent.RunnableConsumerThreadPool$FiberThreadImpl.run(RunnableConsumerThreadPool.java:422)
at java.lang.Thread.run(Thread.java:595)
2008-04-29 10:52:18,494 ERROR [CollectdScheduler-50 Pool-fiber10] OneToOnePersister: Unable to persist data for jopenfile: org.opennms.netmgt.rrd.RrdException: An error occured creating rrdfile /opt/opennms/share/rrd/snmp/214/jmx-test/jopenfile.jrb: org.jrobin.core.RrdException:
Invalid heartbeat, must be positive: -2
org.opennms.netmgt.rrd.RrdException: An error occured creating rrdfile /opt/opennms/share/rrd/snmp/214/jmx-test/jopenfile.jrb: org.jrobin.core.RrdException: Invalid heartbeat, must be positive: -2
at org.opennms.netmgt.rrd.RrdUtils.createRRD(RrdUtils.java:198)
at org.opennms.netmgt.collectd.PersistOperationBuilder.commit(PersistOperationBuilder.java:110)
at org.opennms.netmgt.collectd.BasePersister.commitBuilder(BasePersister.java:72)
at org.opennms.netmgt.collectd.OneToOnePersister.completeAttribute(OneToOnePersister.java:57)
at org.opennms.netmgt.collectd.AbstractCollectionAttribute.visit(AbstractCollectionAttribute.java:65)
at org.opennms.netmgt.collectd.AttributeGroup.visit(AttributeGroup.java:75)
at org.opennms.netmgt.collectd.AbstractCollectionResource.visit(AbstractCollectionResource.java:103)
at org.opennms.netmgt.collectd.JMXCollector$JMXCollectionSet.visit(JMXCollector.java:913)
at org.opennms.netmgt.collectd.CollectableService.doCollection(CollectableService.java:354)
at org.opennms.netmgt.collectd.CollectableService.run(CollectableService.java:296)
at org.opennms.netmgt.scheduler.LegacyScheduler$1.run(LegacyScheduler.java:292)
at org.opennms.core.concurrent.RunnableConsumerThreadPool$FiberThreadImpl.run(RunnableConsumerThreadPool.java:422)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.jrobin.core.RrdException: Invalid heartbeat, must be positive: -2
at org.jrobin.core.DsDef.validate(DsDef.java:146)
at org.jrobin.core.DsDef.<init>(DsDef.java:83)
at org.jrobin.core.RrdDef.addDatasource(RrdDef.java:230)
at org.opennms.netmgt.rrd.jrobin.JRobinRrdStrategy.createDefinition(JRobinRrdStrategy.java:105)
at org.opennms.netmgt.rrd.QueuingRrdStrategy.createDefinition(QueuingRrdStrategy.java:732)
at org.opennms.netmgt.rrd.RrdUtils.createRRD(RrdUtils.java:193)
... 12 more