All Communities are using a single bootstrapper

[qstokkink]

The IPv8 component has a single bootstrapper:

tribler/src/tribler-core/tribler_core/components/implementation/ipv8.py

Line 101 in 47c9b6e

self.bootstrapper = DispersyBootstrapper(**args)

This instance is being inserted into multiple communities, for example:

tribler/src/tribler-core/tribler_core/components/implementation/gigachannel.py

Line 50 in 47c9b6e

community.bootstrappers.append(ipv8_component.bootstrapper)

tribler/src/tribler-core/tribler_core/components/implementation/popularity.py

Line 36 in 47c9b6e

community.bootstrappers.append(ipv8_component.bootstrapper)

A Bootstrapper instance cannot deal with being used in multiple Community instances. Effectively, this causes the Community instances to overwrite eachother. Instead, each Community instance should have its own bootstrapper. This is how it looked before #6206:

tribler/src/tribler-core/tribler_core/modules/community_loader.py

Lines 27 to 35 in ecb479d

	def get_bootstrappers(self, session):
	from ipv8.bootstrapping.dispersy.bootstrapper import DispersyBootstrapper
	from ipv8.configuration import DISPERSY_BOOTSTRAPPER
	bootstrap_override = session.config.ipv8.bootstrap_override
	if bootstrap_override:
	address, port = bootstrap_override.split(':')
	return [(DispersyBootstrapper, {"ip_addresses": [(address, int(port))],
	"dns_addresses": []})]
	return [(DispersyBootstrapper, DISPERSY_BOOTSTRAPPER['init'])]

If you're using the same bootstrapper configuration everywhere, I'd recomment replacing ipv8.bootstrapper with a factory method ipv8.get_bootstrapper() that makes new DispersyBootstrapper instances.

[kozlovsky]

@qstokkink thank you for the explanation! I think the PR should fix the problem