Ivan Daschinskiy created IGNITE-11364:
-----------------------------------------
Summary: Segmenting node can cause ring topology broke
Key: IGNITE-11364
URL: https://issues.apache.org/jira/browse/IGNITE-11364
Project: Ignite
Issue Type: Bug
Affects Versions: 2.7, 2.6, 2.5
Reporter: Ivan Daschinskiy
Fix For: 2.8
While segmenting by partial network drop, i.e. by applying iptables rules, can
cause ring broke.
Scenario:
On each machine there are two nodes, client and server respectivelly.
Lets draw diagram (only server nodes for brevity, they have been started before
clients).
=> grid915 => ....... => grid947 => grid945 => grid703 => ..skip 12 nodes...=>
grid952 => grid946.
On grid945 machine we drop incoming/outgoing connections by iptables.
During ongoing drop of connection, grid945 send TcpDiscoveryStatusCheckMessage,
but cannot send them to grid703 and others mentioned above 12 nodes, but some
next node accepted it with collection of failedNodes (13 nodes above). This
message was received by grid947 and it skip these 13 nodes in
org.apache.ignite.spi.discovery.tcp.ServerImpl.RingMessageWorker#sendMessageAcrossRing.
So we see this situation in topology:
.................. => grid947 => grid952
^
//
grid703=>................=>grid662
These nodes are not considere by topology as failed.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
