Various updates.

src/xapi.js

@@ -19,10 +19,12 @@ require('util').inherits(Xapi, require('events').EventEmitter);
 
 Xapi.prototype.call = function (method) {
 	var args = arguments;
-	var params = Array.prototype.slice.call(arguments, 1);
+	var tries = 0;
 
 	var self = this;
+	return function helper() {
 		return Q(self.sessionId).then(function (session_id) {
+			var params = Array.prototype.slice.call(args, 1);
 			if (session_id)
 			{
 				params.unshift(session_id);
@@ -42,14 +44,29 @@ Xapi.prototype.call = function (method) {
 
 			return value.Value;
 		}).fail(function (error) {
-		if ('HOST_IS_SLAVE' !== error[0])
+
+			// XAPI sommetimes close the connection when the server is
+			// no longer pool master (`event.next`), so we have to
+			// retry at least once to know who is the new pool master.
+			if ((0 === tries) && ('ECONNRESET' === error.code))
 			{
-			throw error;
+				// @todo Does not work because it seems to reuse the
+				// broken socket.
+
+				++tries;
+				return helper();
 			}
 
+			if ('HOST_IS_SLAVE' === error[0])
+			{
+				tries = 0;
 				self.changeHost(error[1]);
-		return self.call.apply(self, args);
+				return helper();
+			}
+
+			throw error;
 		});
+	}();
 };
 
 Xapi.prototype.changeHost = function (host) {