MongoDb 常见错误处理方法收集

星辰

2020-12-24

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# MongoDb 常见错误处理方法收集

## MongoDB Prematurely reached end of stream
* 收集到的处理方法1：
	当连接闲置一段时间，由于防火墙或者负载均衡的原因，导致连接被关闭，而客户端并不知道，当客户端继续使用这个关闭的连接进行读写时就会出错
	解决办法就是设置连接闲置时间，当超过这个闲置时间客户端主动关闭连接，下次使用时重新建立连接，这样可以有效避免连接失效的问题
在spring boot中配置MongoClientOptions的bean。例如将最大闲置时间设为6000ms

maxConnectionLifeTime

```
@Configuration
public class WechatMpConfiguration {
    @Bean
    public MongoClientOptions mongoOptions() {
        return MongoClientOptions.builder().maxConnectionIdleTime(6000).build();
    }
}

# mongo 驱动连接参数信息
description = builder.description;
applicationName = builder.applicationName;
minConnectionsPerHost = builder.minConnectionsPerHost;
maxConnectionsPerHost = builder.maxConnectionsPerHost;
threadsAllowedToBlockForConnectionMultiplier = builder.threadsAllowedToBlockForConnectionMultiplier;
serverSelectionTimeout = builder.serverSelectionTimeout;
maxWaitTime = builder.maxWaitTime;
maxConnectionIdleTime = builder.maxConnectionIdleTime;
maxConnectionLifeTime = builder.maxConnectionLifeTime;
connectTimeout = builder.connectTimeout;
socketTimeout = builder.socketTimeout;
socketKeepAlive = builder.socketKeepAlive;
readPreference = builder.readPreference;
writeConcern = builder.writeConcern;
readConcern = builder.readConcern;
codecRegistry = builder.codecRegistry;
sslEnabled = builder.sslEnabled;
sslInvalidHostNameAllowed = builder.sslInvalidHostNameAllowed;
alwaysUseMBeans = builder.alwaysUseMBeans;
heartbeatFrequency = builder.heartbeatFrequency;
minHeartbeatFrequency = builder.minHeartbeatFrequency;
heartbeatConnectTimeout = builder.heartbeatConnectTimeout;
heartbeatSocketTimeout = builder.heartbeatSocketTimeout;
localThreshold = builder.localThreshold;
requiredReplicaSetName = builder.requiredReplicaSetName;
dbDecoderFactory = builder.dbDecoderFactory;
dbEncoderFactory = builder.dbEncoderFactory;
socketFactory = builder.socketFactory;
cursorFinalizerEnabled = builder.cursorFinalizerEnabled;
commandListeners = builder.commandListeners;
clusterListeners = builder.clusterListeners;
serverListeners = builder.serverListeners;
serverMonitorListeners = builder.serverMonitorListeners;
```
网上还有中说法是说驱动和版本的问题，主要是说`com.mongodb.BasicDBObject`和他`com.alibaba.fastjson.JSONObject`的问题，用`com.mongodb.BasicDBObject`可以兼容版本。但是目前版主没用到这东西，应该不是这个问题，先记录下。

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