I have setup a MongoDB instance on AWS and am trying to connect to it from another AWS instance where my web app is installed.
The following is the contents of my jdoconfig.xml file:
<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>
However, the web app cannot connect to the MongoDB instance. The following are error messages from the logs:
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
It looks like the ConnectionURL is not correct; DataNucleus JDO implementation is trying to connect to localhost instead of the instance where my DB is located.
Can anyone show me what the correct ConnectionURL should look like or if you think the problem is elsewhere point me to it?
You mean you haven’t specified the connectionURL correctly, as per
http://www.datanucleus.org/products/accessplatform_3_1/mongodb/support.html
I’d expect something more like “mongodb:servername:/mydb” … as per the doc