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17fb707f80
The test was flaky, because of the "endpoint prediction".
The test starts 5 nodes one by one.
Node 0 is used as a bootstrap node for nodes 1-4.
When it is about to add, say, node 3, nodes 0 and 1 might already have had a chance to communicate,
and updateEndpoints() deletes the node 0 UDP port, because fallbackUDP port was not configured.
In this case node 3 would get a bootstrap node 0 without a port and lead to an error:
v5_udp_test.go:110: bad bootstrap node "enr:...": missing UDP port
The problem was reproducible by this command:
go test ./p2p/discover -run TestUDPv5_lookupE2E -count 500
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|---|---|---|
| .. | ||
| v4wire | ||
| v5wire | ||
| common.go | ||
| lookup.go | ||
| node.go | ||
| ntp.go | ||
| table_test.go | ||
| table_util_test.go | ||
| table.go | ||
| v4_lookup_test.go | ||
| v4_udp_test.go | ||
| v4_udp.go | ||
| v5_udp_test.go | ||
| v5_udp.go | ||