Cannot invoke "...AggregationRowRemovedCallback.removedAggregationGroupKey(Object)" because "this.removedCallback" is null

[kaicao]

Could you help us understand what can cause error of

Cannot invoke "com.espertech.esper.common.internal.epl.agg.core.AggregationRowRemovedCallback.removedAggregationGroupKey(Object)" because "this.removedCallback" is null

For filter like:

INSERT INTO some_stream
SELECT customerID as customerID,
	   WINDOW(value1).distinctOf() as value1,
           value2,
           value3,
           min(startTime) AS minTimestamp,
           max(endTime) AS maxTimestamp
FROM Event(
 event.identifier IN ("Some identification")
).win:time(5 minutes) as event

GROUP BY customerID, value2, value3, event.getSomeBooleanValue()

HAVING SUM(count) > 0

OUTPUT SNAPSHOT EVERY 300 SECONDS

Esper 8.9.0 is in use.

[bernhardttom]

wasn't able to reproduce. Sample below

env.advanceTime(0);
String epl = "select p00, min(p01), max(p01) from SupportBean_S0#time(5) as s0 " +
"group by p00, s0.getP02() " +
"having sum(id) > 2" +
"output snapshot every 5 sec";
env.compileDeploy(epl);

long current = 5000;
for (int i = 0; i < 1000; i++) {
env.sendEventBean(new SupportBean_S0(1, "a", "b", "c"));
env.advanceTime(5000 * i);
}

env.undeployAll();