"Unable to open connection to agent" error

[PatchAdmin]

Hi there

Can anyone help me with the following error message that I recieve from one of my system while trying to connect to the other one.


"error contacting agent node_name
"error opening connectin on port 5601
cps_client_handshake:error reading version from server
"no bytes read from remote process while reading header
"unable to open connection to agent
"agent update failed"

Regards

[Willem Grooters]

I suppose:
Application on node1 tryes to send a message on Node2, port 5601.

Possible causes:
* Can Node2 be accessed from node1?
* Does port 5601 on Node2 actually REACT?

If the connection is TCP-based, you can check this by doing this from node1:

$ TELNET node2 5601

If this returns DIRECTLY with an error, check port 5601 on node2.

If you have defined a service on node2 on port 5601, check these:
* Has the service been enabled?
* Is access allowed from node1?
* Has the user actually has been defined in UAF for NETWORK ACCESS and has sufficient quota and privilige. Another problem I found once was that the account was expired....
* Check accounting for this user (/PROCESS_TYPE=NETWORK/USER=). It may give you a clue on what's wrong.
* Check this user's SYS$LOGIN (found in UAF). There should be a log file (unless you specified NOLOG on the service. If so, aenable logging!). If the logfile does not exists, check access!
* the file you specified must exist in SYS$LOGIN of that user, but you can specify another location. However: beware that any logical (explicitly mentioned as well as implied) MUST be defined /SYSTEM (at least).
* there shouldn't be any SET TERM/INQ in the SSYS$MANAGER:SYLOGIn.COM and LOGIN.COM of this user. This _could_ crash the service procedure.

If it's a UDP based service, checks apply as well, but I'm not sure if ou could use telnet for checking.
If a program on node2 is to listen to this port, there shlouldn't be a service defined at all on that port. Check logs of that program.

Willem