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This issue can occur when there is no connection to the database or when the connection is too slow / experiencing increased latency. Are your POS devices reaching the EC2 instance over a cellular network (LTE or 5G)? If so this could be causing the DNS resolution to fail. Try correlating the error with other data points like latency spikes on your connection, or DB IP address changes / cached DNS records.
回答済み 6ヶ月前
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