我目前正在尝试使用(相对)新的3.0 Java驱动程序连接到MongoDB副本集。但是,我似乎无法捕获用户提供错误凭据时发生的MongoSecurityExceptions。这是我目前的代码。
try {
MongoClientURI mongoClientURI = new MongoClientURI("mongodb://<user>:<password>@member1.com:27017/?authSource=db"
this.mongoClient = new MongoClient(mongoClientURI);
}
catch(Exception e) {
// TODO: some proper exception handling
System.err.println(e.toLocalizedMessage());
}
当使用正确的凭据运行时,此代码可以正常工作,但是当提供错误的凭据时,会在try-catch之外抛出异常。
com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=null, userName='<user>', source='<source>', password=<hidden>, mechanismProperties={}}
at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:61)
at com.mongodb.connection.DefaultAuthenticator.authenticate(DefaultAuthenticator.java:32)
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:127)
at java.lang.Thread.run(Thread.java:745)
知道在哪里处理身份验证异常?
答案 0 :(得分:6)
MongoClient构造函数不会抛出任何与连接相关的异常。相反,它们在启动一个或多个后台线程后立即返回,这些后台线程尝试建立连接并根据提供的凭据进行身份验证。
仅当应用程序使用MongoClient在MongoDB服务器上执行某些操作时才会抛出异常。但是,该异常是一个通用超时异常,表示驱动程序在server selection timeout到期之前未能为该操作找到合适的服务器。例如:
MongoClient client = new MongoClient(asList(new ServerAddress("localhost"), new ServerAddress("localhost:27018")),
singletonList(MongoCredential.createCredential("username",
"admin",
"bad".toCharArray())),
MongoClientOptions.builder().serverSelectionTimeout(1000).build());
try {
client.getDB("admin").command("ping");
} catch (MongoTimeoutException e) {
// do something
}
将在1秒后抛出MongoTimeoutException。虽然没有抛出MongoSecurityException,但MongoTimeoutException的消息将包含相关的详细信息。例如,当其中一个服务器关闭时连接到三个成员副本集,并且其余两个服务器上的身份验证失败时,MongoTimeoutException的消息字段将类似于:
在等待匹配的服务器的1000毫秒后超时 ReadPreferenceServerSelector {readPreference =初级}。客户端视图 集群状态是{type = UNKNOWN,servers = [{address = localhost:27017, type = UNKNOWN,state = CONNECTING, exception = {com.mongodb.MongoSocketOpenException:异常打开 socket},由{java.net.ConnectException:Connection refused}}引起, {address = localhost:27018,type = UNKNOWN,state = CONNECTING, exception = {com.mongodb.MongoSecurityException:Exception 验证MongoCredential {mechanism = null,userName ='username', source ='admin',password =,mechanismProperties = {}}},由 {com.mongodb.MongoCommandException:命令失败,错误18: '身份验证失败。'在服务器localhost:27018。完整的回应 是{“ok”:0.0,“code”:18,“errmsg”:“身份验证失败。” }}}]