DataFlux DM Server Data Services Log Question - DFWSVCs NULLed

[KBednarchuk]

I am running SOAP services on DM server and finding occasionally that a service is "NULLed". Does anyone what this means and if the end user would get an error message?

log example:

1016_15:38:02.410 INFO rid:615; among 10 loaded DFWSVCs 1 NULLed, 0 KILLed, 3 BUSY

[VincentRejany · Accepted solution]

Hi

Sorry for the late feedback. For performance purposes, the server keeps a collection (or pool) of available services to use for running requests. These are called DFWSVC. When a request comes in, the request is handed off to one of these for processing. Once processing has started it goes into the BUSY state. When it is neither in the busy state nor in the available state, it is in the NULLed state. This means that it’s been taken out of the pool to be used, but has not yet started processing. Or it has completed processing but has not yet been put back into the pool of available processes. I think it’s normal to see this, but if all of the services were in this state continuously, then it might indicate a problem.

As for what the “NULL” means, in the code there is an array of services, and elements are set to NULL when they are in this state. Do agree that the log message could have been a bit more end-user friendly.