ERROR: "Txpi 303: SSL Socket send error return value = 72" XCOM for AS/400 i5/OS
Article ID: 252079
Updated On:
Products
Issue/Introduction
XCOM SSL transfers failing on iSeries when several submitted simultaneously to another iSeries machine.
The problem occurs when multiple transfers are initiated simultaneously e.g. > 10.
If submit a small number of transfers they are successful.
Sending machine job log shows error:
Txpi 303: SSL Socket send error return value = 72
Receiving machine job log shows error:
Txpi 304: SSL Socket receive error return value = 73
Environment
XCOM™ Data Transport® for AS/400 i5/OS
Cause
When starting the listener, the value of the "TCP/IP send check frequency" parameter SENDCHKFRQ had been set to 0 when normally it is set to the default value of 50.
Resolution
On receiving machine the XCOM TCP/IP listener (in this using 8044 as a secure port) has been started with:
MAXCLIENTS = 10
MAXBACKLOG = 310
Set the MAXCLIENTS to the maximum number of concurrent transfers that need to be run and then set MAXBACKLOG to MAXCLIENTS + 3. So the latter criteria is satisfied.
Restarting the listener using a SENDCHKFRQ value of 50 resolved the problem.
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