michael goulish created DISPATCH-2173:
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Summary: 30-Mesh Behaving Badly
Key: DISPATCH-2173
URL: https://issues.apache.org/jira/browse/DISPATCH-2173
Project: Qpid Dispatch
Issue Type: Bug
Components: Router Node
Reporter: michael goulish
Assignee: michael goulish
While testing scale-up of full-mesh networks I encountered some Bad Behavior at
30 nodes. (435 connections.)
On my first try, 15 of the routers died.
On my second try, no nodes died – but the network never converged. It consumed
all available CPU (32 cores) for three minutes, and the 30 routers printed a
combined total of more than 1000 radius calculations to their logs by the time
I became wrathful and cast them all into the Bitbucket of Woe.
For reference, those radius calculations are how I decide that the network has
converged – everybody has settled down and agreed on the topology and stopped
talking about it. The last thing each router prints to its log is a radius
calculation, and then it's done. This may happen multiple times for each
router, but when the total number of such prints stops changing – the network
has converged.
For 15 or 20 routers, the number of such prints was 20 or 40 or so. When this
test exceeded that by 25x, I decided it was never going to quit.
...Now looking at the logs to see if I can figure out what was happening...
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