/**
* Check that a request to change this node's HA state is valid. In particular, verifies that, if
* auto failover is enabled, non-forced requests from the HAAdmin CLI are rejected, and vice
* versa.
*
* @param req the request to check
* @throws AccessControlException if the request is disallowed
*/
private void checkHaStateChange(StateChangeRequestInfo req) throws AccessControlException {
switch (req.getSource()) {
case REQUEST_BY_USER:
if (autoFailoverEnabled) {
throw new AccessControlException(
"Manual failover for this ResourceManager is disallowed, "
+ "because automatic failover is enabled.");
}
break;
case REQUEST_BY_USER_FORCED:
if (autoFailoverEnabled) {
LOG.warn(
"Allowing manual failover from "
+ org.apache.hadoop.ipc.Server.getRemoteAddress()
+ " even though automatic failover is enabled, because the user "
+ "specified the force flag");
}
break;
case REQUEST_BY_ZKFC:
if (!autoFailoverEnabled) {
throw new AccessControlException(
"Request from ZK failover controller at "
+ org.apache.hadoop.ipc.Server.getRemoteAddress()
+ " denied "
+ "since automatic failover is not enabled");
}
break;
}
}
private static String getClientMachine() {
String clientMachine = NamenodeWebHdfsMethods.getRemoteAddress();
if (clientMachine == null) { // not a web client
clientMachine = Server.getRemoteAddress();
}
if (clientMachine == null) { // not a RPC client
clientMachine = "";
}
return clientMachine;
}