java.net.SocketException: Permission denied: Attempt to access a blocked recipient without permission. (mapped-IPv4)

[FrEaKmAn]

Hi all

I'm using RabbitMQ Java client to connect to external server. I'm getting the following exception 

java.net.SocketException: Permission denied: Attempt to access a blocked recipient without permission. (mapped-IPv4)
 at com.google.appengine.api.socket.SocketApiHelper.translateError(SocketApiHelper.java:108)
 at com.google.appengine.api.socket.SocketApiHelper.translateError(SocketApiHelper.java:119)
 at com.google.appengine.api.socket.SocketApiHelper.makeSyncCall(SocketApiHelper.java:85)
 at com.google.appengine.api.socket.AppEngineSocketImpl.connectSocket(AppEngineSocketImpl.java:421)
 at com.google.appengine.api.socket.AppEngineSocketImpl.connectToAddress(AppEngineSocketImpl.java:372)
 at com.google.appengine.api.socket.AppEngineSocketImpl.connect(AppEngineSocketImpl.java:352)
 at java.net.Socket.connect(Socket.java:612)
 at com.rabbitmq.client.impl.FrameHandlerFactory.create(FrameHandlerFactory.java:32)
 at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:619)
 at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:648)
        ...

Any ideas what this is happening? Should I enable something extra?

[Nick (Cloud Platform Support)]

Hey FrEaKmAn,

Google Groups isn't the best place to post specific technical issues, as this forum is meant more for general discussion of the platform and services. 

If you would like help with a technical issue on your end, you should post to stackoverflow [1] or serverfault [2]. 

If you believe you've identified and can reproduce an issue with the platform itself (behaviour is different from documentation or error occurs during normal use), then you should proceed to open a public issue tracker [3] issue with enough detail to reproduce the issue on our side, or if possible, an attached app that can be used to directly observe the behaviour. 

Your issue report contains not quite enough information to determine what is happening, even in the event that you did post it to one of those other locations, so I suggest adding more detail before doing so:

* what connection code is responsible for triggering this stacktrace in your program? (You didn't post the full stacktrace)
* are there any special properties of the server you're connecting to?
* are there any other logs or information which is relevant?
* what's a brief description and history of what you've attempted in terms of fixing this?
* what kind of timeframe does this issue cover? has it always happened? just started? only during high load? etc.

If you would like to open a thread in this forum discussing the platform or services in more broad terms, starting a discussion that would be useful for other users to join in to, feel free to do so.

Have a great day!

[1] http://www.stackoverflow.com/

[2] http://www.serverfault.com/

[3] http://code.google.com/p/google-appengine/issues/list

[FrEaKmAn]

Hello Nick

I solved the problem. It was incorrect configuration (it was connecting to 127.0.0.1 instead of the correct production IP).   

[Nick (Cloud Platform Support)]

Ah, well that would be the problem then ;) Best of luck with your development!

[Big Query]

HI FrEaKmAn,

Please may you help on , how you configure the correct production IP?

Thanks
Manish



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[Nick (Cloud Platform Support)]

Hey Hemanth,

It will depend on what you are attempting to connect to. It appears that FrEaKmAn was connecting to a local database while developing (127.0.0.1) and then attempted to deploy but still deployed code which tried to reach "127.0.0.1" which fails in the production network for obvious reasons.