Consultor Eletrônico

Status: Verified

SYMPTOM(s):

Socket handle parameter passed to the connect procedure of the server becomes invalid after +/- 1024 socket connections

Errors 3135 and 3140 after +/- 1024 socket connections

Invalid widget-handle. Not initialized or points to a deleted widget. (3135)

Cannot access the <attribute name> attribute because the widget does not exist. (3140)

Code based on samples supplied in the Progress External Program Interfaces manual

Socket is connected and disconnected +/- 1024 times

Socket object is disconnected and deleted in the 4GL socket client code

FACT(s) (Environment):

Progress 9.x
OpenEdge 10.x
All Supported Operating Systems

CAUSE:

The operating system runs out of file descriptors and is unable to create a new socket connection. Thus, the parameter being passed to the connection procedure on the server is the unknown value, not a valid handle to a socket. This happens because the server never deletes any of the sockets - the connection procedure should end with a disconnect and delete of the socket.

FIX:

The connection procedure should end with a disconnect and delete of the socket otherwise the server will never delete any of the sockets:

/* Sample from Progress External Program Interfaces manual */
PROCEDURE connProc.
/* Connection procedure for server socket */
DEFINE INPUT PARAMETER hSocket AS HANDLE. /*Socket implicitly created*/

MESSAGE "We are in CONNECT event procedure, connProc".
hSocket:WRITE (mBuffer,1,LENGTH(greeting)).
MESSAGE hSocket:BYTES-WRITTEN "bytes written".

hsocket:DISCONNECT().
DELETE OBJECT hsocket.
END.