MongoDb+；Java驱动程序

我正在使用MongoDb作为数据库构建Resteasy服务

它在我的Mac电脑上运行良好，但在测试服务器的Fedora 15上，它会引发如下错误：

    07:20:15,060 WARNING [com.mongodb.tcp] (http--0.0.0.0-8000-1) Exception determining maxBSON size using0: java.io.IOException: couldn't connect to [eid/67.215.65.132:27017] bc:java.net.ConnectException: Connection timed out
    at com.mongodb.DBPort._open(DBPort.java:228) [mongo-2.7.0.jar:]
    at com.mongodb.DBPort.go(DBPort.java:112) [mongo-2.7.0.jar:]
    at com.mongodb.DBPort.go(DBPort.java:93) [mongo-2.7.0.jar:]
    at com.mongodb.DBPort.findOne(DBPort.java:146) [mongo-2.7.0.jar:]
    at com.mongodb.DBPort.runCommand(DBPort.java:157) [mongo-2.7.0.jar:]
    at com.mongodb.DBTCPConnector.fetchMaxBsonObjectSize(DBTCPConnector.java:457) [mongo-2.7.0.jar:]
    at com.mongodb.DBTCPConnector.checkMaster(DBTCPConnector.java:444) [mongo-2.7.0.jar:]
    at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:209) [mongo-2.7.0.jar:]
    at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:305) [mongo-2.7.0.jar:]
    at com.mongodb.DBCursor._check(DBCursor.java:369) [mongo-2.7.0.jar:]
    at com.mongodb.DBCursor._hasNext(DBCursor.java:498) [mongo-2.7.0.jar:]
    at com.mongodb.DBCursor.hasNext(DBCursor.java:523) [mongo-2.7.0.jar:]
    at eid.ariel.TestService.getAllUsers(TestService.java:39) [classes:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_22]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [:1.6.0_22]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [:1.6.0_22]
    at java.lang.reflect.Method.invoke(Method.java:616) [:1.6.0_22]
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:255) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:220) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:209) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:519) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.2.1.GA.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.2.1.GA.jar:]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
    at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952) [jbossweb-7.0.1.Final.jar:7.0.2.Final]
    at java.lang.Thread.run(Thread.java:679) [:1.6.0_22]

访问数据库的代码是：

public List<DBObject> getAllUsers() throws UnknownHostException, MongoException, FileNotFoundException{
    Mongo mongo = new Mongo("localhost");
    DBCollection collection = mongo.getDB("eid_security_dev").getCollection("users");
    DBCursor cur = collection.find();
    List<DBObject> result = new ArrayList<DBObject>();
    while (cur.hasNext()){

        result.add(cur.next());
    }
    return result;
}

public List getAllUsers（）抛出UnknownHostException、MongoException、FileNotFoundException{
Mongo Mongo=新的Mongo（“本地主机”）；
DBCollection=mongo.getDB（“eid_security_dev”）.getCollection（“用户”）；
DBCursor cur=collection.find（）；
列表结果=新建ArrayList（）；
while（cur.hasNext（））{
result.add（cur.next（））；
}
返回结果；
}

使用Mongo驱动程序2.7.0和mongodb服务器2.0.0

java.io.IOException: couldn't connect to [eid/67.215.65.132:27017] bc:java.net.ConnectException: Connection timed out

您的DB客户端似乎无法连接到MongoDB服务器。有几件事需要调查：

• 确保数据库服务器已启动并正在运行

• 使用

  mongo

  shell验证您的MongoDB服务器是否完全可运行

• 67.215.65.132

  是一个公共IP地址

  localhost

  通常应解析为地址为

  127.0.0.1

  或类似地址的环回接口。尝试直接使用

  127.0.0.1

  ，因为使用公共IP可能意味着存在阻止访问DB服务器端口的防火墙规则。连接超时而不是被拒绝使得这种情况很可能发生

---

。例如，您正在使用OpenDNS为未知主机返回此IP。

DB已启动并运行，mongo shell工作正常，127.0.0.1给出了相同的结果。我不知道67.215.65.132是从哪里来的：（在我重新安装整个服务器并这次使用127.0.0.1之后，错误就消失了….感谢您的帮助：）