java代码中的Mongo db身份验证失败不会去catch块

Question

我正在尝试编写测试mongo DB身份验证的代码。

但是，当身份验证失败时，代码无法访问catch块。

以下是代码：

MongoClient client = null;  
try {  
List<MongoCredential> credentials = new ArrayList<MongoCredential>();  
credentials.add(  
    MongoCredential.createScramSha1Credential(  
       "abc",  
        "test",  
        "abc@123".toCharArray()  
    )
);  
client = new MongoClient(host,credentials, MongoClientOptions  
        .builder().connectionsPerHost(20)  
        .threadsAllowedToBlockForConnectionMultiplier(15)  
        .connectTimeout(5000)  
        .writeConcern(WriteConcern.ACKNOWLEDGED).build());  
} catch (Exception e) {  
client = new MongoClient(host, MongoClientOptions  
        .builder().connectionsPerHost(20)  
        .threadsAllowedToBlockForConnectionMultiplier(15)  
        .connectTimeout(5000)  
        .writeConcern(WriteConcern.ACKNOWLEDGED).build());  
//  e.printStackTrace();  
}  
client.getDatabase("admin").runCommand(new Document("ping",1));  

com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=SCRAM-SHA-1, userName='abc', source='test', password=<hidden>, mechanismProperties={}}
at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:61)
at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:99)
at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:44)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128)
at java.lang.Thread.run(Unknown Source)

此代码永远不会进入catch块并在catch块之后运行该行。

你能告诉我如何处理这种情况。