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  1. Drools
  2. DROOLS-6395

PrometheusMetricsDroolsListener is repeatedly added to the same ksession instance

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    • 2021 Week 22-24 (from May 31)
    • 2
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      1. Enable prometheus metrics

      <property name="org.kie.prometheus.server.ext.disabled" value="false"/>
      

      2. Call a stateless ksession with the same lookup id in kie-server multiple times.
      3. Capture a heap dump
      4. In the heap dump, look at StatelessKnowledgeSessionImpl.listeners. It contains multiple PrometheusMetricsDroolsListener instances.

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      1. Enable prometheus metrics <property name= "org.kie.prometheus.server.ext.disabled" value= "false" /> 2. Call a stateless ksession with the same lookup id in kie-server multiple times. 3. Capture a heap dump 4. In the heap dump, look at StatelessKnowledgeSessionImpl.listeners. It contains multiple PrometheusMetricsDroolsListener instances.
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    Description

      DroolsKieSessionLookupHandler repeatedly adds PrometheusMetricsDroolsListener to the same ksession instance. It will cause performance degrade especially for stateless ksession. Also metric count is not reliable.

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              rhn-support-tkobayas Toshiya Kobayashi
              rhn-support-tkobayas Toshiya Kobayashi
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                Updated:
                Resolved: