OSI/MHS Configuration and Management Manual

Troubleshooting Your OSI/MHS Subsystem
OSI/MHS Configuration and Management Manual—424827-003
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Event-Message Sequences for Common MHS
Functions
The OSI/MHS SCF Reference Manual provides information about trace options and
trace record formats. The OSI/MHS Management Programming Manual describes
each event message and the tokens in each message and indicates which tokens are
displayed or printed if you use the event-message templates supplied with OSI/MHS.
The EMS Programming Manual describes how to write filters, and the EMS Template
Manual describes how to customize event templates.
Event-Message Sequences for Common MHS Functions
This manual gives examples of the sequence of events reported for various types of
message flows. It then presents an example of how event messages can be used to
locate a performance bottleneck due to an inappropriate route definition.
The descriptions below refer to the following functional units within OSI/MHS:
Deferred Delivery Handler
This unit monitors queues of messages scheduled for deferred delivery. The deferred
delivery handlers of all MR groups share the same queues, so that a request to cancel
deferred delivery can be serviced even if the MR group that received the delivery has
failed.
Diagnostics
This functional unit within the MR process makes copies of bad PDUs and writes
diagnostic records to the OSI/MHS logs. (A bad PDU is one that cannot be decoded,
or a report that cannot be delivered or relayed, or a message that cannot be processed
and for which no report can be created.)
Distribution List Expansion
This functional unit within the MR process resolves a distribution list name to the
names of its members.
Gateway Access Unit
This functional unit in the MR process interacts with the processes that provide
gateway interfaces: the entry and wait managers and, in the case of a general user
gateway, the Gateway Interface Process (GIP).
MTA Association Manager
This functional unit within the MR process interacts with the RTS process to initiate and
accept associations.
Note. In the pages that follow, this manual indicates which common tokens can be used to
correlate event messages pertaining to the same message flow. Not all of those tokens are
displayed or printed if you use the event-message templates supplied with OSI/MHS.