Question

我正在创建一个应用程序范围的mongo客户端，以便在我的应用程序中重用它。第一次访问mongo客户端时，我在服务器日志中看到以下日志，表示已创建三个客户端。第三个客户端是在应用程序范围内创建的客户端，如前面的信息消息所示。我还可以在mongodb日志中看到，有2个额外的连接被打开，没有关闭或被后续呼叫重用。

[08.09.14 20:09:57:060 CEST] 000000c9 Mongo         I   Creating Mongo instance (driver version 2.11.4) with authority MongoAuthority{type=Direct, serverAddresses=[/127.0.0.1:27017], credentials={credentials={}}} and options MongoOptions{description='null', connectionsPerHost=100, threadsAllowedToBlockForConnectionMultiplier=5, maxWaitTime=120000, connectTimeout=10000, socketTimeout=0, socketKeepAlive=false, autoConnectRetry=false, maxAutoConnectRetryTime=0, slaveOk=false, readPreference=primary, dbDecoderFactory=DefaultDBDecoder.DefaultFactory, dbEncoderFactory=DefaultDBEncoder.DefaultFactory, safe=false, w=0, wtimeout=0, fsync=false, j=false, socketFactory=javax.net.DefaultSocketFactory@f6fb9709, cursorFinalizerEnabled=true, writeConcern=WriteConcern { "getlasterror" : 1} / (Continue Inserting on Errors? false), alwaysUseMBeans=false}
[08.09.14 20:09:57:060 CEST] 000001ba Mongo         I   Creating Mongo instance (driver version 2.11.4) with authority MongoAuthority{type=Direct, serverAddresses=[/127.0.0.1:27017], credentials={credentials={}}} and options MongoOptions{description='null', connectionsPerHost=100, threadsAllowedToBlockForConnectionMultiplier=5, maxWaitTime=120000, connectTimeout=10000, socketTimeout=0, socketKeepAlive=false, autoConnectRetry=false, maxAutoConnectRetryTime=0, slaveOk=false, readPreference=primary, dbDecoderFactory=DefaultDBDecoder.DefaultFactory, dbEncoderFactory=DefaultDBEncoder.DefaultFactory, safe=false, w=0, wtimeout=0, fsync=false, j=false, socketFactory=javax.net.DefaultSocketFactory@f6fb9709, cursorFinalizerEnabled=true, writeConcern=WriteConcern { "getlasterror" : 1} / (Continue Inserting on Errors? false), alwaysUseMBeans=false}
[08.09.14 20:09:57:070 CEST] 000000c9 mongodb       I   multiple Mongo instances for same host, jmx numbers might be off
[08.09.14 20:09:57:070 CEST] 000001ba mongodb       I   multiple Mongo instances for same host, jmx numbers might be off
[08.09.14 20:09:57:111 CEST] 000001ba SystemOut     O INFO  MongoDBConnection initializeClient - Creating mongo client for localhost:27017
[08.09.14 20:09:57:111 CEST] 000001ba Mongo         I   Creating Mongo instance (driver version 2.11.4) with authority MongoAuthority{type=Direct, serverAddresses=[localhost/127.0.0.1:27017], credentials={credentials={}}} and options MongoOptions{description='null', connectionsPerHost=100, threadsAllowedToBlockForConnectionMultiplier=5, maxWaitTime=120000, connectTimeout=10000, socketTimeout=0, socketKeepAlive=false, autoConnectRetry=false, maxAutoConnectRetryTime=0, slaveOk=false, readPreference=primary, dbDecoderFactory=DefaultDBDecoder.DefaultFactory, dbEncoderFactory=DefaultDBEncoder.DefaultFactory, safe=false, w=0, wtimeout=0, fsync=false, j=false, socketFactory=javax.net.DefaultSocketFactory@f6fb9709, cursorFinalizerEnabled=true, writeConcern=WriteConcern { "getlasterror" : 1} / (Continue Inserting on Errors? false), alwaysUseMBeans=false}

还请注意日志中的不同服务器地址：serverAddresses = [localhost / 127.0.0.1：27017]和serverAddresses = [/ 127.0.0.1:27017]。我在我的代码中将localhost设置为主机名。

下面是mongo客户端的生产者方法。

@Produces
@ApplicationScoped
public MongoClient initializeClient() {
    log.info(String.format("Creating mongo client for %s:%s", host, port));
    MongoClient client = null;
    try {
        client = new MongoClient(host, port);
    }
    catch (UnknownHostException e) {
        log.error(e);
    }
    return client;
}

有人知道导致这两个其他实例的原因是什么，我该如何防止这种情况？

Mongo Java Driver创建了三个客户端

0 个答案: