TRANSFER Installation and Management Guide

What to Do When Mail Is Not Delivered
Troubleshooting
13198 Tandem Computers Incorporated 12–3
The discussion on configuring TMANAGER in Section 10 of this guide tells you
how to specify the amount of time a control record can exist in the ROPENCTL file
before you get an alarm message warning you of a network problem.
As a temporary solution when TWORKs are tied up by a network problem, you
can do the following until the problem is fixed:
PUP DOWN! the network line handlers.
Lock the ROPENCTL as explained in "Isolating a Node From the Network"
later in this section.
Restart the TWORKs if necessary.
PUP UP! the network line handlers.
In this configuration, the importing of mail and local delivery of mail continues,
but the exporting of mail to other nodes does not.
In addition, you can use TMANAGER to see why you are not getting mail.
Enter TMANAGER to check the scheduler queue sampling. Section 10 of this
guide discusses how to configure scheduler queue sampling.
Press F10 to get the SCHEDULER QUEUE SCAN screen.
Check the number of items in the READY queue, which shows you the work
still waiting to be done, displayed in order of priority. The highest priority
work should be mail-delivery requests (work types 1, 3, and 5).
The problem could be that many mail-delivery requests have queued because
of an unusual load on the system. Make sure that you have sufficient TAREQ
terminals and TWORK servers configured to handle the workload. If all mail
delivery—for both locally and remotely originated messages—is slow, run
process measurements using MEASURE on the TAREQ-TCPs, TWORKs, and
TRECVs. If the problem is specifically with delivery of messages from other
nodes, also check the TAREQ-TCPs and TWORKs on the originating nodes.
Press F1 to get the SCHEDULER QUEUE SAMPLES screen. Check the history
of the queues to see if a backlog of entries in the READY queue indicates a
recurring problem.
For a particular item, use TMANAGER to check the status of package recipients.
If you want to determine why an item has not been delivered to a specific
recipient, you use the TMANAGER ITEM TRACE screen. There are three
ways that you can trace an item:
If you know the item ID—listed in the TSCHED log—enter the item ID on
the TMANAGER MAIN MENU screen and press F12 to get the ITEM
TRACE screen.
You can also trace an item directly from the SCHEDULER QUEUE SCAN
screen. Select the item with the cursor and press F12 to get the ITEM
TRACE screen and trace the item.