Я хотел инициализировать/обновить состояние шаблона из исторических данных и в некоторых случаях часто получал StackOverflowError. Я написал простой пример для демонстрации:
public class Main {
EsperPatternStackOverflow.zip
public static void main(String[] args) {
Configuration configuration = new Configuration();
configuration.addEventType("TestEvent", TestEvent.class);
configuration.getEngineDefaults().getViewResources().setShareViews(false);
configuration.getEngineDefaults().getExecution().setAllowIsolatedService(true);
EPServiceProvider epService = EPServiceProviderManager.getDefaultProvider(configuration);
epService.initialize();
EPServiceProviderIsolated isolatedService = epService.getEPServiceIsolated("Isolated");
EPStatement stmt = isolatedService.getEPAdministrator().createEPL("select * from pattern [every (a=TestEvent -> b=TestEvent(theString=a.theString)) where timer:within(1 day)]", "TestStatement",null);
int hour_ms = 60*60*1000;
isolatedService.getEPRuntime().sendEvent(new CurrentTimeEvent(System.currentTimeMillis()- 2*hour_ms));
isolatedService.getEPRuntime().sendEvent(new TestEvent("str1", 1));
stmt.addListener((newEvents, oldEvents) -> {
System.out.println("Fired");
});
isolatedService.getEPAdministrator().removeStatement(stmt);
epService.getEPRuntime().sendEvent(new TestEvent("str1", 3));
}
}
TestEvent — это простой класс с двумя полями: int theInt, String theString.
Результат:
Exception in thread "main" java.lang.StackOverflowError
at com.espertech.esper.filter.FilterParamIndexEquals.matchEvent(FilterParamIndexEquals.java:29)
at com.espertech.esper.filter.FilterHandleSetNode.matchEvent(FilterHandleSetNode.java:99)
at com.espertech.esper.filter.EventTypeIndex.matchType(EventTypeIndex.java:170)
at com.espertech.esper.filter.EventTypeIndex.matchEvent(EventTypeIndex.java:108)
at com.espertech.esper.filter.FilterServiceBase.retryableMatchEvent(FilterServiceBase.java:179)
at com.espertech.esper.filter.FilterServiceBase.evaluateInternal(FilterServiceBase.java:109)
at com.espertech.esper.filter.FilterServiceLockCoarse.evaluate(FilterServiceLockCoarse.java:67)
at com.espertech.esper.core.service.EPRuntimeImpl.handleFilterFault(EPRuntimeImpl.java:1267)
at com.espertech.esper.core.service.EPRuntimeImpl.processStatementFilterSingle(EPRuntimeImpl.java:1242)
at com.espertech.esper.core.service.EPRuntimeImpl.handleFilterFault(EPRuntimeImpl.java:1271)
at com.espertech.esper.core.service.EPRuntimeImpl.processStatementFilterSingle(EPRuntimeImpl.java:1242)
.......................................................................................................................................................................
Также я получил следующее исключение для похожих случаев (отличаются только верхней точкой исключения):
java.lang.StackOverflowError
at com.espertech.esper.event.bean.CGLibPropertyGetter.get(CGLibPropertyGetter.java:63)
at com.espertech.esper.filter.FilterParamIndexEquals.matchEvent(FilterParamIndexEquals.java:29)
at com.espertech.esper.filter.FilterHandleSetNode.matchEvent(FilterHandleSetNode.java:99)
at com.espertech.esper.filter.EventTypeIndex.matchType(EventTypeIndex.java:170)
at com.espertech.esper.filter.EventTypeIndex.matchEvent(EventTypeIndex.java:108)
at com.espertech.esper.filter.FilterServiceBase.retryableMatchEvent(FilterServiceBase.java:179)
at com.espertech.esper.filter.FilterServiceBase.evaluateInternal(FilterServiceBase.java:109)
at com.espertech.esper.filter.FilterServiceLockCoarse.evaluate(FilterServiceLockCoarse.java:67)
at com.espertech.esper.core.service.EPRuntimeImpl.handleFilterFault(EPRuntimeImpl.java:1267)
at com.espertech.esper.core.service.EPRuntimeImpl.processStatementFilterSingle(EPRuntimeImpl.java:1242)
at com.espertech.esper.core.service.EPRuntimeImpl.handleFilterFault(EPRuntimeImpl.java:1271)
at com.espertech.esper.core.service.EPRuntimeImpl.processStatementFilterSingle(EPRuntimeImpl.java:1242)
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Почему возникает это исключение и как я могу решить эту проблему? Спасибо.