FD_HOST: host failure detection protocol ---------------------------------------- Key: JGRP-1855 URL: https://issues.jboss.org/browse/JGRP-1855 Project: JGroups Issue Type: Feature Request Security Level: Public(Everyone can see) Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.4.5, 3.5 A new protocol similar to FD_PING which detects entire host failures and suspects all members on the failed host. Features are: * Contrary to FD_PING which uses a ring structure, FD_HOST will have everyone ping everybody else (similar to FD_ALL) ** A structure keeps track of hosts (IP addresses) and members on those hosts *** Example ||192.168.1.2||192.168.1.3||192.168.1.5|| |A,B,C|D,E,F|X,Y,Z| * We sort the members lexically and the *first* member runs a ping against each other IP address, e.g. A pings 192.168.1.3 and 192.168.1.5, D pings 192.168.1.2 and 192.168.1.5 etc * The ping command itself is pluggable and can be a Java class (e.g. using {{InetAddress.isReachable()}}, a script or a command (e.g. {{/sbin/ping}}). * When an entire host is suspected, we suspect *all* cluster members on it ** Example: if B suspects 192.168.1.5, members X, Y and Z are suspected and removed from the view