Using: 5.2.0.Final of drools camel server , JSON api, and a Stateless Session
We are making JSON calls to the camel (execution) server. Our
end-to-end unit tests pass. Our load tests, however, show that memory
is never reclaimed after each call to the rules engine. After parsing
through a heap dump, we see the following path taking up over 800 meg of
memory:
(kagent) KnowledgeAgentImpl$ChangeSetNotificationDetector
> (kbase) KnowledgeAgentImpl
>> (ruleBase) KnowledgeBaseImpl
>>> (eventSupport) ReteooRuleBase
>>>> (listeners) RuleBaseEventSupport
>>>>> (array) CopyOnWriteArrayList
>>>>>> ReteooWorkingMemory (around 864K of these)
The rule base is very small and simple - this is only a problem during a load
test (or over the course of a weeks worth of calls). We make the following
call 10K times:
{
"batch-execution": {
"lookup": "ksession1",
"commands": [
{
"insert": {
"out-identifier": "tc_1",
"object": {.....}
}}]}}
The knowledge-services.xml configures :
- kagent id="agent1" kbase="kbase1" new-instance="true"
- ksession id="ksession1" type="stateless" kbase="kbase1" node="node1"
The rules just update the inserted "timecard" fact.
Because I'm using a stateless session, I don't think I need to
dispose of the agent...and I don't think there is a way to call dispose
using the json/Execution Command api.
We are calling the camel (execution) server from a non-java
environment to process employee timecards entries and evaluate for
overtime calculations.
Thanks!
Mike _______________________________________________
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