subscriptionExpiration for topic

[uestczshen]

for some reasons, my subscriptionName changes when my server restarts. But the old subname still exists in pulsar-server and alarms messages heap up. so maybe there should be expire policies for unused subscription.

[jiazhai]

Yes, there is ttl policy for this: https://pulsar.apache.org/docs/en/cookbooks-retention-expiry/
This is a kind of question, would like to close this issue, if the ttl policy could not solve your issue, feel free to reopen this issue.

[nkurihar]

@uestczshen
subscriptionExpirationTimeMinutes seems to help you:

pulsar/conf/broker.conf

Lines 178 to 180 in 2dc2470

	# How long to delete inactive subscriptions from last consuming
	# When it is 0, inactive subscriptions are not deleted automatically
	subscriptionExpirationTimeMinutes=0

This setting can be enabled at broker level or namespace level.
cf: #6851