synchronized boolean isServerDeadAndNotProcessed(ServerName server) {
if (server == null) return false;
if (serverManager.isServerOnline(server)) {
String hostAndPort = server.getHostAndPort();
long startCode = server.getStartcode();
Long deadCode = deadServers.get(hostAndPort);
if (deadCode == null || startCode > deadCode.longValue()) {
if (serverManager.isServerReachable(server)) {
return false;
}
// The size of deadServers won't grow unbounded.
deadServers.put(hostAndPort, Long.valueOf(startCode));
}
// Watch out! If the server is not dead, the region could
// remain unassigned. That's why ServerManager#isServerReachable
// should use some retry.
//
// We cache this info since it is very unlikely for that
// instance to come back up later on. We don't want to expire
// the server since we prefer to let it die naturally.
LOG.warn("Couldn't reach online server " + server);
}
// Now, we know it's dead. Check if it's processed
return !processedServers.containsKey(server);
}
