jdoconfig.xml 中的 MongoDb ConnectionURL

Question

我在 AWS 上设置了一个 MongoDB 实例，并尝试从安装了我的 Web 应用程序的另一个 AWS 实例连接到它。

以下是我的 jdoconfig.xml 文件的内容:

<jdoconfig xmlns="http://java.sun.com/xml/ns/jdo/jdoconfig"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://java.sun.com/xml/ns/jdo/jdoconfig http://java.sun.com/xml/ns/jdo/jdoconfig_3_0.xsd">

    <persistence-manager-factory name="MY-PMF">
        <property name="javax.jdo.PersistenceManagerFactoryClass"
            value="org.datanucleus.api.jdo.JDOPersistenceManagerFactory" />
        <property name="javax.jdo.option.ConnectionURL" value="mongodb://ec2-[...].eu-west-1.compute.amazonaws.com:27017/mydb" />
        <property name="javax.jdo.option.Mapping" value="mongodb" />
        <property name="javax.jdo.option.ConnectionUserName" value="myuser" />
        <property name="javax.jdo.option.ConnectionPassword" value="mypassword" />
        <property name="javax.jdo.option.Optimistic" value="false" />
        <property name="datanucleus.autoCreateSchema" value="true" />
    </persistence-manager-factory>
</jdoconfig>

但是，Web 应用无法连接到 MongoDB 实例。以下是日志中的错误消息:

com.mongodb.MongoException$Network: can't call something : localhost/127.0.0.1:27017//ec2-[...].eu-west-1.compute.amazonaws.com:27017/mydb
    at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:226)
    at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:313)
    at com.mongodb.DB.command(DB.java:174)
    at com.mongodb.DB.command(DB.java:158)
    at com.mongodb.DB.command(DB.java:198)
    at com.mongodb.DB.command(DB.java:144)
    at com.mongodb.DB._doauth(DB.java:555)
    at com.mongodb.DB.authenticate(DB.java:492)
    at org.datanucleus.store.mongodb.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:200)
    at org.datanucleus.store.mongodb.MongoDBStoreManager.addClasses(MongoDBStoreManager.java:127)
    at org.datanucleus.store.AbstractStoreManager.addClass(AbstractStoreManager.java:1137)
    at org.datanucleus.ObjectManagerImpl.newObjectId(ObjectManagerImpl.java:3310)
    at org.datanucleus.api.jdo.JDOPersistenceManager.newObjectIdInstance(JDOPersistenceManager.java:1627)
    at org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1749)
    at com.myapp.server.auth.MyActionHandler.execute(MyActionHandler.java:67)
    at com.myapp.server.auth.MyActionHandler.execute(MyActionHandler.java:1)
    at com.gwtplatform.dispatch.server.AbstractDispatchImpl.doExecute(AbstractDispatchImpl.java:153)
    at com.gwtplatform.dispatch.server.AbstractDispatchImpl.execute(AbstractDispatchImpl.java:111)
    at com.gwtplatform.dispatch.server.AbstractDispatchServiceImpl.execute(AbstractDispatchServiceImpl.java:80)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:561)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
    at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263)
    at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178)
    at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62)
    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:168)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:168)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
    at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
    at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:680)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:679)
Caused by: java.io.IOException: couldn't connect to [localhost/127.0.0.1:27017] bc:java.net.ConnectException: Connection refused
    at com.mongodb.DBPort._open(DBPort.java:222)
    at com.mongodb.DBPort.go(DBPort.java:111)
    at com.mongodb.DBPort.call(DBPort.java:78)
    at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:217)
    ... 55 more

看起来ConnectionURL不正确； DataNucleus JDO 实现正在尝试连接到本地主机而不是我的数据库所在的实例。

任何人都可以告诉我正确的 ConnectionURL 应该是什么样子，或者如果您认为问题出在其他地方，请指出我的问题？

Answer 1

你的意思是你没有正确指定 connectionURL，按照 http://www.datanucleus.org/products/accessplatform_3_1/mongodb/support.html

根据文档，我希望得到更像“mongodb:servername:/mydb”的东西