JBoss EAP management plug-in fails to collect datasource metrics when min or max pool size value includes a system property or expression

Solution Unverified - Updated -

Issue

  • (rhq.core.pc.measurement.MeasurementCollectorRunner)- Failure to collect measure

  • I got WARN in the agent.log as follow:

    WARN  [MeasurementManager.collector-1] (rhq.core.pc.measurement.MeasurementCollectorRunner)- Failure to collect measurement data for Resource[id=19035, uuid=7b70ba45-f941-144d-02dc-ab9f5afeeab2, type={JBossAS7}DataSource (Standalone), key=subsystem=datasources,data-source=MyAppDS, name=MyAppDS, parent=datasources] - cause: java.lang.ClassCastException:java.util.LinkedHashMap cannot be cast to java.lang.Integer

  • The following errors or warnings are being logged by the agent:

    ERROR [WorkerThread#0[127.0.0.1:36143]] (rhq.core.pc.measurement.MeasurementManager)- Could not get measurement values
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.Integer
    at org.rhq.modules.plugins.jbossas7.DatasourceComponent.getRCAsMetric(DatasourceComponent.java:395)
    at org.rhq.modules.plugins.jbossas7.DatasourceComponent.getValues(DatasourceComponent.java:206)
    ...
WARN  [MeasurementManager.collector-1] (rhq.core.pc.measurement.MeasurementCollectorRunner)- Failure to collect measurement data for Resource[id=10153, uuid=2c96de45-00f1-4310-91ac-1b9d7806254b, type={JBossAS7}DataSource (Standalone), key=subsystem=datasources,data-source=NoTxRHQDS, name=NoTxRHQDS, parent=datasources], requests=[ScheduledMeasurementInfo[res=10153, name=min-pool-size, sched=11799], ScheduledMeasurementInfo[res=10153, name=max-pool-size, sched=11800]], report.size()=3
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.Integer
    at org.rhq.modules.plugins.jbossas7.DatasourceComponent.getRCAsMetric(DatasourceComponent.java:395)
    at org.rhq.modules.plugins.jbossas7.DatasourceComponent.getValues(DatasourceComponent.java:208)
    at sun.reflect.GeneratedMethodAccessor64.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocation.call(ResourceContainer.java:654)
    ...

  • Metric collection fails with java.lang.ClassCastException:java.util.LinkedHashMap cannot be cast to java.lang.Integer

Environment

  • Red Hat JBoss Operations Network (ON) 3.2.0
  • Red Hat JBoss Enterprise Application Platform (EAP) 6 management plug-in for JBoss ON
  • JBoss EAP datasource deployed

  • Datasource's pool configuration includes min-pool-size or max-pool-size element which uses a system property in its value:

                ...
            <pool>
                <min-pool-size>${my.app.ds.minpool:5}</min-pool-size>
                <max-pool-size>${my.app.ds.maxpool:100}</max-pool-size>
            </pool>
            ...

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