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https://issues.apache.org/jira/browse/IGNITE-13663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denis A. Magda closed IGNITE-13663.
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> Represent in the documenttion affection of several node addresses on failure
> detection v2.
> ------------------------------------------------------------------------------------------
>
> Key: IGNITE-13663
> URL: https://issues.apache.org/jira/browse/IGNITE-13663
> Project: Ignite
> Issue Type: Improvement
> Components: documentation
> Affects Versions: 2.7.6, 2.9, 2.8.1
> Reporter: Vladimir Steshin
> Assignee: Denis A. Magda
> Priority: Major
> Labels: iep-45
> Fix For: 2.10
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> We should document that TcpDiscoverySpi prolongs detection of node failure if
> node has several addresses.
> By default, all available addresses are assigned to node and node listens any
> address (0.0.0.0). Not first non-loopback addresses as the documentation
> says. Simple example on my ordinary Mac having WiFi, VPN and docker (from
> Ignite log): `Local node addresses: [192.168.1.42/0:0:0:0:0:0:0:1%lo0,
> /127.0.0.1, /192.168.1.42, /10.11.220.206]`.
> It is cleary seen that `ServerImpl.TcpServer.srvrSock` binds to '0.0.0.0'.
> And actual failure detection and connection restoring delay is:
> `failureDetectionTimeout * addresses_number + connRecoveryTimeout`. Which is
> usually unexpectable. This peculiarity was unearthed in [1], [2] and
> additionally confirmed in ducktape integration test [3].
> To avoid this, user should assign `IgniteConfiguration.localHost` or
> `TcpDiscoverySpi.localAddress`. Unfortunately, users frequently skip this
> setting and allow node to activate all available IPs.
> Often, middleware runs in environments with several IP addresses
> (virtualizations, containers, different networks). Node sends all obtained
> addresses with other node info to the cluster. Connection to node is
> established to first of its addresses. But if lost, other addresses are
> attempted to reconnect sequentially. If addresses do not belong to assumed
> node network, do not represent existing physical connection, processing them
> is just waste of time.
> [1] https://issues.apache.org/jira/browse/IGNITE-13012
> [2] https://issues.apache.org/jira/browse/IGNITE-13134
> [3]
> https://github.com/apache/ignite/blob/ignite-ducktape/modules/ducktests/tests/ignitetest/tests/discovery_test.py
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