Collecting data about specific problems

Occasionally, there are problems in specific environments or certain problem types that require special handling.

Collecting data about a control region wait or hang
When an IMS control region waits or hangs, IMS can appear frozen or lose partial function. The most critical piece of information in diagnosing such problems is the z/OS® SVC dump.
Collecting data about a control region or DL/I region loop
Occasionally, there are problems in specific environments or certain problem types, that require special handling. If IMS can accept commands, you can set a trace.
Collecting data about an IMS dependent region wait or loop
Occasionally, there are problems in specific environments or certain problem types, that require special handling. If IMS can accept commands, you can set a trace.
Formatting a BPE trace entry
You can format a BPE trace entry by using either the Interactive Problem Control System (IPCS) or a batch job.
Collecting data about DBRC-related problems
DBRC related problems can cause a variety of symptoms, including waits and loops. If you need to create the problem again, copies of the RECON listing, before and after the problem occurred, are most useful.
Collecting data about DBCTL-related problems
DBCTL-related problems can originate from either the CCTL region or one of the IMS regions (CTL, DL/I, DBRC, or IRLM), so it is important to obtain dumps that relate to all these regions.
Collecting data about VTAM-related DC problems
IMS DC-related problems are associated mainly with VTAM® or OTMA. Use these guidelines to collect diagnostic information about VTAM when you experience a problem.
Collecting data about OTMA-related DC problems
IMS DC-related problems are frequently related to either OTMA or VTAM. Use these guidelines to collect diagnostic information about OTMA when you experience a problem.
Collecting data about APPC-related DC problems
APPC problems that originate from IMS dependent regions and that make calls explicitly rely heavily on the dependent region dumps.
Collecting data about IMS Connect problems
If a problem occurs during IMS Connect execution, you need to collect logs, data sets, and dumps to determine the source of the problem.
Collecting data about ISC TCP/IP link problems
If a problem occurs on an ISC link that uses TCP/IP, you might need to collect diagnostic information from IMS, the Structure Call Interface (SCI) component of the IMS Common Service Layer (CSL), IMS Connect, TCP/IP, and IBM® CICS® Transaction Server for z/OS.
Collecting data about CQS-related problems
CQS problems can appear in various ways and, like the IMS control region, they can manifest themselves in the form of WAITs, HANGs, LOOPs, or some other type of internal error that results in an SDUMP being taken.
Collecting data about CSL-related problems
The Common Service Layer address spaces, Open Database Manager (ODBM), Operations Manager, Structured Call Interface, and Resource Manager, produce SDUMPs for internal errors. The CSL dumps are in the SYS1.DUMP data sets.
Repository Server audit log records
If AUDIT=YES is specified in the FRPCFG member of the IMS PROCLIB data set, the Repository Server (RS) writes to the z/OS logger audit log stream name specified in the AUDIT_LOG= parameter.
Collecting data about ESAF and DB2 ESS interface problems
ESAF (External Subsystem Attach Facility) interface problems can be diagnosed by using the external trace data set. You can use the IMS /TRACE command to direct and control the tracing of internal IMS events.
Collecting data about database problems
The first step to diagnosing an IMS problem is to collect data about the problem. If you call an IBM service representative, you will be asked for documentation about the problem.
Collecting data about z/OS Resource Recovery Services problems
RRS provides a system resource recovery platform such that applications that run on z/OS can have access to local and distributed resources and have system-coordinated recovery management of these resources.
Collecting data about MSC-related problems
If you experience IMS Multiple Systems Coupling (MSC) related problems, you can collect diagnosis data with SVC dumps.

Parent topic: Diagnosis