Question

如何捕获以下代码导致的异常？

try {
    MongoCredential credential = MongoCredential.createCredential(
                                  cu.getName(), 
                                  "admin",
                                  cu.getPassword().toCharArray());

    ServerAddress address = new ServerAddress("localhost", 27017);

    mongoClient = new MongoClient(address, Arrays.asList(credential));

} catch (MongoSecurityException e) {
    System.out.println("test");
}

我确实在stacktrace中得到了异常，但我无法捕捉它们。

Mai 29,2017 1:04:37 AM com.mongodb.diagnostics.logging.JULLogger log 信息：使用设置创建的集群{hosts = [localhost：27017]，mode = SINGLE，requiredClusterType = UNKNOWN，serverSelectionTimeout ='30000 ms'，maxWaitQueueSize = 500} Mai 29,2017 1:04:37 AM com.mongodb.diagnostics.logging.JULLogger log 信息：连接到服务器localhost时监视器线程中的异常：27017 com.mongodb.MongoSecurityException：异常验证MongoCredential {mechanism = null，userName ='root'，source ='admin'，password =，mechanismProperties = {}} 在com.mongodb.connection.SaslAuthenticator.wrapInMongoSecurityException（SaslAuthenticator.java:157）在com.mongodb.connection.SaslAuthenticator.access 200美元（SaslAuthenticator.java:37）在com.mongodb.connection.SaslAuthenticator $ 1.run（SaslAuthenticator.java:66）在com.mongodb.connection.SaslAuthenticator $ 1.run（SaslAuthenticator.java:44）在com.mongodb.connection.SaslAuthenticator.doAsSubject（SaslAuthenticator.java:162）在com.mongodb.connection.SaslAuthenticator.authenticate（SaslAuthenticator.java:44）在com.mongodb.connection.DefaultAuthenticator.authenticate（DefaultAuthenticator.java:32） at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll（InternalStreamConnectionInitializer.java:109） at com.mongodb.connection.InternalStreamConnectionInitializer.initialize（InternalStreamConnectionInitializer.java:46）在com.mongodb.connection.InternalStreamConnection.open（InternalStreamConnection.java:116）在com.mongodb.connection.DefaultServerMonitor $ ServerMonitorRunnable.run（DefaultServerMonitor.java:113）在java.lang.Thread.run（未知来源）引起：com.mongodb.MongoCommandException：命令失败，错误18：'身份验证失败。在服务器localhost：27017。完整响应是{“ok”：0.0，“errmsg”：“身份验证失败。”，“代码”：18，“codeName”：“AuthenticationFailed”} 在com.mongodb.connection.CommandHelper.createCommandFailureException（CommandHelper.java:170）在com.mongodb.connection.CommandHelper.receiveCommandResult（CommandHelper.java:123）在com.mongodb.connection.CommandHelper.executeCommand（CommandHelper.java:32）在com.mongodb.connection.SaslAuthenticator.sendSaslContinue（SaslAuthenticator.java:121）在com.mongodb.connection.SaslAuthenticator.access 100美元（SaslAuthenticator.java:37）在com.mongodb.connection.SaslAuthenticator $ 1.run（SaslAuthenticator.java:63） ......还有9个 `

Answer 1

您似乎遇到了身份验证问题：

com.mongodb.MongoSecurityException：异常验证MongoCredential {mechanism = null，userName ='root'，source ='admin'，password =，mechanismProperties = {}} at ...`

查看您的代码，我看到它被称为public static void ConvertFlatArrayToMatrix(int[] array, int[,] matrix, int dimension) { for(int i = 0; i < array.Length; i++) { int r = Mathf.FloorToInt(i / dimension); int c = i % dimension; matrix[c,r] = array[i]; } }，它接受3个参数（用户，数据库和密码）。

假设您的凭据正确无误，我强烈怀疑MongoCredential.createCredential()不是您的数据库名称。

如何在Java中连接到MongoDB时捕获异常？

1 个答案: