使用Java验证mongodb时，它花费了更多时间，并且在凭据错误的情况下抛出mongotimeoutException

Question

MongoClient m = new MongoClient(new ServerAddress("182.178.0.29",27017), 
        Arrays.asList(MongoCredential.createCredential("username", "employeedb", "password".toCharArray())));
MongoDatabase md = m.getDatabase("employeedb");
MongoIterable<String> strings = md.listCollectionNames();
MongoCursor<String> iterator = strings.iterator();  

After authentication i need to show message to end user. But, the exception is comming after 30 seconds in case when the user enters wrong credentials.User needs to wait untill the msg dialog comes. Could you please check why it is taking that much time and is there any other way to authenticate.

MongoDB version: 3.2.14 java driver version: 3.2.1

Exception:

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector

Answer 1

If you know why your authentication is failing ( you mentioned wrong credentials) , then you can customize the timeout period for failing authentication using serverSelectionTimeout property so that you can show your users the failed authentication rather quickly. More explanation can be seen on MongoDB site here .

The serverSelectionTimeoutMS variable gives the amount of time in milliseconds that drivers should allow for server selection before giving up and raising an error. Users can set this higher or lower depending on whether they prefer to be patient or to return an error to users quickly (eg a "fail whale" web page). The default is 30 seconds, which is enough time for a typical new-primary election to occur during failover.