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From artnaseef <...@artnaseef.com>
Subject Re: Data Migration from KahaDB to LevelDB?
Date Thu, 12 Mar 2015 03:59:07 GMT
Non-durable topic subscriptions have that issue no matter what - lose the
connection and all unconsumed messages are dropped.  And all messages
published while disconnected are also missed.

Keep in mind too that Topics do not persist messages themselves in ActiveMQ;
only durable subscriptions lead to persistence of the messages.

Migrating from one broker to another, or even upgrading a single broker,
non-durable Topic subscriptions need a solution outside the broker.  Of
course, given their nature, I hope the application is written in such a way
that missing those messages is not critical since otherwise the application
is going to have major problems (due to message loss) when there are hiccups
in the network.



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