Experimental Physics and
Industrial Control System

On Fri, Aug 9, 2013 at 11:49 AM, Dirk Zimoch <[email protected]> wrote:

On 09.08.2013 11:42, Dirk Zimoch wrote:

On 09.08.2013 11:20, Pavel Maslov wrote:

Hello all,

When can this message pop up:

2013/08/09 11:03:11.051131 lambda1 lambda-ps:CURR:MAX:RBV:
pasynCommon->connect() failed: 127.0.0.1:7001 <http://127.0.0.1:7001>:
Link already open!
2013/08/09 11:03:11.052968 lambda1 lambda-ps:CURR:MAX:RBV: Protocol
aborted

The message itself looks like coming from StreamDevice. But without more
information I cannot say why the connect() call of asyn fails. At least
report the port configuration and the protocol.

What StreamDevice does:

    pasynManager->isConnected(pasynUser, &connected);
    if (!connected)
    {
        status = pasynCommon->connect(pvtCommon, pasynUser);
        if (status != asynSuccess)
        {
            error("%s: pasynCommon->connect() failed: %s\n",
                clientName(), pasynUser->errorMessage);
            return false;
        }
    }

Dear Asyn-experts: Is this wrong?
At least it is a race condition. Is there any atomic way to say "Connect if not already connected" ?

Dirk