DT663E message encountered when attempting to view a Detector datastore from another LPAR

Products

• Detector for DB2 for z/OS
• Subsystem Analyzer for DB2 for z/OS

Issue/Introduction

Encountering the following message when attempting to view a Detector for Db2 for z/OS (PDT) datastore from another system:

DT663E: cross system error: Abend

Resolution

Detector makes use of Xmanager to route requests from one system in a Sysplex to another.
There are 2 Xmanager parameters (TIMEOUT and CPUTIME) involved in a cross system

view of a datastore as described above.

 

TIMEOUT specifies the number of seconds that one Xmanager will wait for execution,

of a request routed to another Xmanager in the Sysplex complex, to complete before 

signaling a timeout error.

The default value for TIMEOUT is 20.

 

CPUTIME specifies the number of CPU seconds the Xmanager lets a process 

consume when satisfying a request routed from another Xmanager in the Sysplex 

complex.

The default value for CPUTIME is 10.

 

When a cross system request is routed across from a local Xmanager to a remote

Xmanager, the remote Xmanager allows the routed request the specified CPUTIME

to complete. If the request does not complete within this time then a U0966

abend is registered in that remote Xmanager.

The net effect is that the request will eventually exceed the TIMEOUT value 

in the local Xmanager, at which point the DT663E is seen in Detector.

 

In this case, one or both of CPUTIME and TIMEOUT values may need to be increased

in order to satisfy the request. CPUTIME should generally be increased first if the remote
Xmanager has registered a U0966 abend related to the request.

 

As a guide to how much the value may need to be increased by, attempt to access the

datastore locally from the lpar on which it resides. The time taken should give an

indication of the value that CPUTIME will need to be set to in the Xmanager.

If the increased value for CPUTIME now exceeds the TIMEOUT value then you should

also look to increase the TIMEOUT value to at least the same value as being used

for CPUTIME.

 

 

Note:

The CPUTIME and TIMEOUT values do not factor in any additional time that it may take

to recall the underlying datasets for a datastore, if they have been previously archived.

So this should be a consideration when setting the values for the 2 parms, particularly if the 

expectation is that datastore datasets will more likely be archived than not.