Why queues get blocked in XI

I have observed thet queues in XI get blocked even though there is no error.
When I unlock it , Queues get cleared.
Please let me know why queues get blocked .
Thanks in Advance.

Hi,
Queues might get blocked to various reasons.
The reasons i can think of are:
1) Contention for resources : If there is a contention for resources like memory, the first message of the queue gets blocked, causing subsequent messages to be blocked as well.
2) Huge messages: HUge payloads choke the queues.
3) Receiving system processing the messages slower than the sending system.
Regards,
Ravi Kanth Talagana

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