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[英]timed out after 30000 ms while waiting for a server that matches WritableServerSelector
[英]No server chosen by WritableServerSelector from cluster
作为 MongoDB 的新手,我正在尝试将一个简单的文档插入到我新安装的 mongoDB (v3.2.4) 中。 使用 MongoDB 驱动程序 3.2.2。 这是我最小化的代码:
public <classname>()
{
public static final String COLLECTION_NAME = "logs";
MongoClient mongoClient = new MongoClient("<server-adress>");
MongoDatabase db = mongoClient.getDatabase("test");
Document data = new Document ();
data.append(<whatever>);
//...inserting more into document...
db.getCollection(COLLECTION_NAME).insertOne(data); //collection should be created new
mongoClient.close();
}
程序正在执行,但我在执行过程中收到以下错误(和信息):
Mär 16, 2016 3:50:06 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Cluster created with settings {hosts=[<server-adress>:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
Mär 16, 2016 3:50:06 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: No server chosen by WritableServerSelector from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, all=[ServerDescription{address=<server-adress>:27017, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
Mär 16, 2016 3:50:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Exception in monitor thread while connecting to server <server-adress>:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.connection.SocketStream.open(SocketStream.java:63)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:114)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection refused: connect
(...)
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:50)
at com.mongodb.connection.SocketStream.open(SocketStream.java:58)
... 3 more
Error: Timed out after 30000 ms while waiting for a server that matches WritableServerSelector. Client view of cluster state is {type=UNKNOWN, servers=[{address=<server-adress>:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
文档也没有插入。
当我用 insertOne() 命令注释该行时,它消失了。 所以我认为这不是连接问题,是吗?
我有一些想法:
WritableServerSelector
-Thing)?但是对于所有这些想法,我找不到真正的证据......
(请改进问题标题,我没有更好的主意......)
我自己解决了。
我还应该提到,我正在尝试从另一台机器连接到 MongoDB 实例。 MongoDB 预设不允许这样做。
所以我不得不在 /etc/mongod.conf 文件中将bindIp
后面的值从 127.0.0.1 更改为 0.0.0.0。
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