MongoSocketReadException: Prematurely reached end of stream (after a period of inactivity)

Question

I get this error on a find call (default Java Driver) after a period of inactivity. I tried to add a manual heartbeat (writing to a capped collection), but it d

Answer 1

I solve this problem by set sslEnabled to true,code sample：

@Bean
public MongoClient mongoClient() {
    List 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;
}

Addition: my client jar is org.mongodb.mongodb-driver 3.6.4,server is mongodb atlas M0 3.6.6 on GCP