RE: [asyn] link already open!

[Mark Rivers <rivers@cars.uchicago.edu>]

Please provide some more information:

- When does the error occur?  At iocInit when connecting to the device for the first time?  When the server first comes on line?  When the server is restarted?

- The server is at port 7001 on the localhost.  Is that server always running when the IOC is running?  Does the server disconnect after each transaction?

You have created the drvAsynIPPort with the default value of 0 for the last 3 parameters, so it is using noAutoConnect=0, which means that asynManager will automatically try to connect the port before queuing a request.  If the connection attempt fails then asynManager will not queue the request.  So I am having a hard time understanding how StreamDevice found the port disconnected, unless your server disconnected in the time between when asynManager queued the request and when StreamDevice was called.

Mark


________________________________
From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Pavel Maslov [pavel.masloff@gmail.com]
Sent: Friday, August 09, 2013 4:20 AM
To: EPICS Tech Talk
Subject: [asyn] link already open!

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



--
Regards,


Pavel Maslov, MS
Controls Engineer