Question

在一段时间不活动后，我在public class HomeScreenActivity extends AppCompatActivity { AlertDialog alert; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home); overridePendingTransition(R.anim.trans_left_in, R.anim.trans_left_out); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) { Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show(); } if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_COARSE_LOCATION)) { } else { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION); } } } myBleRecever = new BleBroadCastReceiver(); registerReceiver(myBleRecever, new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)); if(device_macid=="") { show_dialog(); } } private void show_dialog() { AlertDialog.Builder builder = new AlertDialog.Builder(HomeScreenActivity.this); builder.setMessage(R.string.connect_device) .setPositiveButton("Connect", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { Intent intent = new Intent(HomeScreenActivity.this, BLEdevicelistActivity.class); if (isBleseviceRegister) { unregisterReceiver(mGattUpdateReceiver); isBleseviceRegister = false; } if (isBindServise) { unbindService(mServiceConnection); isBindServise = false; } alert.dismiss(); startActivityForResult(intent, Constants.BLUETOOTH_REQUEST_CODE); } }); alert = builder.create(); // alert.setCancelable(false); alert.setCanceledOnTouchOutside(false); Logger.log(Level.DEBUG,TAG,"Alert dialog box gets called"); alert.show();// **getting error here** }调用（默认Java驱动程序）上收到此错误。我尝试添加手动心跳（写入上限集合），但它没有帮助。我只是在连接到compose上的实例时（即不在本地上下文中）得到问题。

MongoDB版本是3.2.8，最新驱动程序（3.3），使用Java 8。

有什么想法吗？

Answer 1

我在一些文档中找到了它：

对于长时间运行的应用程序，通常谨慎地启用“keepAlive”数毫秒。没有它，经过一段时间后，您可能会开始看到“连接已关闭”错误，这似乎是没有理由的。

检查这是否有帮助。当您连接到mongoDB时，您可以将套接字选项传递给它。我来自节点背景，我们使用以下选项让它保持活力。

server: {
        socketOptions: {
            keepAlive: 100,
            connectTimeoutMS: 30000
        }
    }

希望这会有所帮助!!

Answer 2

我通过将sslEnabled设置为true来解决此问题，代码示例：

@Bean
public MongoClient mongoClient() {
    List<ServerAddress> saList = new ArrayList<>();
    saList.add(new ServerAddress("cluster0-shard-00-00-75shm.gcp.mongodb.net", 27017));
    saList.add(new ServerAddress("cluster0-shard-00-01-75shm.gcp.mongodb.net", 27017));
    saList.add(new ServerAddress("cluster0-shard-00-02-75shm.gcp.mongodb.net", 27017));

    char[] pwd =  "password".toCharArray();
    MongoCredential credential = MongoCredential.createCredential("username", "admin", pwd);

    //set sslEnabled to true here
    MongoClientOptions options = MongoClientOptions.builder()
            .readPreference(ReadPreference.primaryPreferred())
            .retryWrites(true)
            .requiredReplicaSetName("Cluster0-shard-0")
            .maxConnectionIdleTime(6000)
            .sslEnabled(true)
            .build();

    MongoClient mongoClient = new MongoClient(saList, credential, options);     
    return mongoClient;
}

另外：我的客户jar是org.mongodb.mongodb-driver 3.6.4，服务器是GCP上的mongodb atlas M0 3.6.6

Answer 3

我同意Rhangaun的答案，这是我在JAVA代码中的解决方案：

    public static DB getMongoDB() {

        MongoClientOptions.Builder builder = new MongoClientOptions.Builder();
        //build the connection options  
        builder.maxConnectionIdleTime(60000);//set the max wait time in (ms)
        MongoClientOptions opts = builder.build();


        char[] password2 = "mypassword".toCharArray();

        MongoCredential credential2 = MongoCredential.createCredential("username", "databasename",password2);


        //add your option to the connection 

        MongoClient mongoClient = new MongoClient(new ServerAddress("server ip",27017), Arrays.asList(credential2),opts);
        //use your database 
        cachedDb = mongoClient.getDB("databasename");

    return cachedDb;

}

以下是我的研究链接：http://3t.io/blog/how-to-prevent-your-connection-from-dropping-with-hosted-mongodb-instances/

希望它对你有所帮助。

Answer 4

这在春季启动和基于云的mongo（Atlas集群实例）中为我工作。

像这样编辑application.properties：

spring.data.mongodb.uri = mongodb+srv://username:password@solarsystem-1tpu0.mongodb.net/dbname

对于常规mongo实例（非集群），请使用以下命令：

spring.data.mongodb.uri = mongodb://username:password@solarsystem-shard-00-00-1tpu0.mongodb.net:27017,hostname2:27017/dbname?ssl=true

如果您要设置其他连接选项，则可以链接使用'＆'的多个参数；文档在这里： https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/MongoClientURI.html
如果您使用其他 spring.data.mongodb参数，则应 删除所有，否则春季将无法阅读 spring.data.mongodb.uri

Answer 5

对我来说，这是一个完全不同的问题-我在mongo-java-server中使用Fongo并最终遇到此错误。原来是old versions of it are not compatible with FieldType.DECIMAL128 conversions。

将其更新到最新版本（当前为1.36.0）为我解决了该问题。

Answer 6

问题是Mongodb终止了连接。您需要增加Mongodb驱动程序的超时，这是示例代码。

 MongoClientOptions.Builder builder = new MongoClientOptions.Builder();
    //build the connection options
    builder.maxConnectionIdleTime(86400000);//set the max wait time in (ms)
    MongoClientOptions opts = builder.build();




    final Morphia morphia = new Morphia();


    morphia.mapPackage("com.java.code");


    final String hostURL = "host_url";
            

    MongoCredential  credential = MongoCredential.createCredential("username","database","Password".toCharArray()); 

    ServerAddress address = new ServerAddress(hostURL);


    List<MongoCredential> credentialList = new ArrayList<>();
    credentialList.add(credential);


   final MongoClient client = new MongoClient(address,credentialList,opts);




    // create the Datastore connecting to the default port on the local host
    datastore  = morphia.createDatastore(client,"datastore");

MongoSocketReadException：过早地到达流的末尾（在一段时间不活动之后）

6 个答案:

这在春季启动和基于云的mongo（Atlas集群实例）中为我工作。