Member Avatar for missil9

Hello,

I am currently trying to use boost asio for IPC. I ran into 2 strange issues:

1) when using the acceptor class, when I bring my process up, I get the error 'Already open' when trying to listen. The port I am trying to bind to is definitely not being used by another process. This only happens for a couple of my processes (others work fine).

2) when trying to establish a connection to a server (one that works fine from above), both processes receive the connection (and also disconnection when I kill one), but when I try to write to the socket, I get the error 'Bad File Descriptor'. BeforeI write, I also am checking _socket->is_open(). This also happens when I try writing IMMEDIATELY after connect().

These issues smell to me like I have failed to clean up resources somewhere, but I went back over my code and am calling close() whenever I am done with a socket (also, after the process dies, shouldn't they be cleaned up anyway? So I am not sure why issue 1) would occur).

HOWEVER, I do NOT experience any of these issues on my local machine. If I run in my vbox (Linux CentOS 32-bit), everything works fine and dandy. This only happens when I run on another server (Linux CentOS 64-bit). I assure you I am doing a fresh compile anyway when I run on either machine.

Is there some difference in the way the sockets are being cleaned up on 32-bit and 64-bit machines? Or is there a machine setting somewhere?

Another thing I notice is that in Boost IPC, there is no 'Localhost'. So on my 32-bit vbox I am connecting to '127.0.0.1'. The remote server supports IPv4 and IPv6 so I also try connecting to '::1' which has the same wierd behavior.

I am by no means an expert on TCP, but any help or further information would be greatly appreciated!

Thank you and have a great day!

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Member Avatar for missil9

Also, if it helps, I am using one single boost::asio::io_service object for all connections... I have a Connector and an Acceptor class that handles these connections. When a new connection occurs, I create a Reader object and pass a pointer to the socket and spawn a new thread to read incoming messages.

Both servers I mentioned above have 2 processors allocated to them as well.

Member Avatar for richieking

can you post your code here if you dont mind.?
we need to read through your code.... possibly run it ourselves ok

Member Avatar for missil9

Hi richieking. I ended up just implementing my own anyway. I have a feeling it had to do with Boost compatability with the machine settings on the one server. My implementation is working as expected now.

Thank you for your time.

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