Group Timeout does not work as expected in Spring Aggregator

问题

Sample aggregator:

<int:aggregator
    input-channel="msgInput"
    output-channel="msgOutput"
    expire-groups-upon-completion="true"
    group-timeout="1000"
    expire-groups-upon-timeout="true"
    send-partial-result-on-expiry="false"
    ref="msgGroup" 
/>

With sequence size of 2, when I manually iterate the timestamp of each messages grouped with msgGroup, there are still some (not all) messages that is more than 1000ms difference. Is there anything that I missed perhaps?

Please note that the correlation ID and sequence number is set programmatically based on the payload. Hence, some messages could have same correlationID with sequence number.

回答1:

I suggest you turn on debug logging and follow the message flows.

I am not sure what you mean by "manually iterate the timestamp". Group timeout has nothing to do with message timestamps; it's based on message arrival time (i.e. last group update time).

来源：https://stackoverflow.com/questions/30421220/group-timeout-does-not-work-as-expected-in-spring-aggregator