Troubleshooting
ERR XReadGroup is cancelled
Symptom
The client gets an exception similar to:
Diagnosis
Pending Entries List of the stream for the consumer is full. For each consumer in a consumer group, there is a pending entries list. This list keeps the messages that are delivered to a consumer but not yet acknowledged via XACK. This list is populated via XREADGROUP.
Solution
Acknowledge the consumed messages via XACK from the list of the associated group and consumer.
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