RabbitMQ shovel losing messages (try to emulate network problems)

Question

I am building the cluster with RabbitQM servers . I use shovel plugin to deliver mesages from one rabbitmq to other (different machines)

It works fine . But i want to test how it will behave when no network connection between servers.

On each server i have local queue. I push messages to it and then shovel delivers a message to remote rabbitmq queue

To emulate network problems i did

iptables -D OUTPUT -d xx.xx.xx.xx -j DROP

to disable connection to remote server xx.xx.xx.xx

then i push message to local queue, it disappears from the queue but is not on remote server! How can it be? does shovel check if remote queue is available before remove a message from a queue?

How to make it to work correctly? I want shovel doesn't remove a message from q queue till ensured ti si delivered to remote queue.

Could you post the output of `rabbitmqctl list_channels`and `rabbitmqctl report`during the issue? create a gist with the outputs, if you can. — Gabriele Santomaggio, Dec 27 '15 at 17:04
Nice trick to emulate packet loss - I'll be adding that one to my toolbox — Peter McEvoy, Dec 20 '19 at 14:09

score 2 · Answer 1 · answered Dec 29 '15 at 13:10

2

I have found the solution for my problem. I changed settings os a shovel. There was the option

ask_mode,on_publish

I changed to

ask_mode, on_confirm

and it started to work correctly.

answered Dec 29 '15 at 13:10

Roman Gelembjuk

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RabbitMQ shovel losing messages (try to emulate network problems)

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