I understand which is why I placed the preprocesssor outside the sampler. It should then be run before all samplers processing data from the previous request.
However if they are only logging is there a specific reason they have to be in that order? On 7 Sep 2017 02:00, Andrew Burton <[email protected]> wrote: Thanks for the reply Stuart. The intention of the having a Post-Processor outside the thread group is that it will apply to all Samplers globally, i.e. for every sampler, log an entry to an additional log file. Then, for the Sampler-specific Post-Processor, extract one or more different fields from a JSON response, so that they will be included in the log. This way we can add additional context to the response time for each request, i.e. we can capture the number of fields returned from a query, to see how much of a correlation this has to response times, etc.Or whether different input parameters included in a body request influence the response time. I suspect given the way the ordering is applied that the only way to do this is to have a global Post-Processor for common sampler data, e.g. is successful, duration, response code, etc. And add a log entry on *every individual* Sampler to include Sampler-specific data. I was trying to avoid having to include a log command for each Sampler, but that might be the only way to do it in the meantime. (The original question only included 1 sampler, that probably didn't help my explanation, which was oriented around multiple different samplers). On Wed, Sep 6, 2017 at 7:19 PM, Stuart Kenworthy <[email protected]> wrote: > Sorry missed out the regex > > + JSR223 Post Processor A > > + JSR223 Pre Processor C (was Post Processor C) > > + Sampler > - + JSR223 Post Processor B > - + Regular Expression Extractor > > -----Original Message----- > From: Stuart Kenworthy [mailto:[email protected]] > Sent: 06 September 2017 09:32 > To: JMeter Users List <[email protected]> > Subject: RE: Multiple Post-Processor execution order > > So you would have > > + JSR223 Post Processor A > > + JSR223 Pre Processor C (was Post Processor C) > > + Sampler > > - + JSR223 Post Processor B > > - + Regular Expression Extractor > > Thanks > > -----Original Message----- > From: Stuart Kenworthy > Sent: 06 September 2017 09:30 > To: JMeter Users List <[email protected]> > Subject: RE: Multiple Post-Processor execution order > > The problem you have is the 2 defined outside the sampler are read before > the sampler is run so they will run first. The only true way to control it > is to have them within the sampler. > > If you are just logging specific fields to file, grab the values using > regex and then use a pre-processor instead so the logging is done before > running the next sampler, if I understand your intentions correctly. > > -----Original Message----- > From: Andrew Burton [mailto:[email protected]] > Sent: 06 September 2017 03:36 > To: JMeter Users List <[email protected]> > Subject: Multiple Post-Processor execution order > > Hi, > > > > Is there any way to control the execution order of post processors that > apply globally vs. those that are sampler-specific? > > > > My use case is that I want to record sampler-specific MDC elements within > a sampler’s post processor, and have a generic post processor that does the > logging. E.g. Get the exact error message in the sampler’s post processor > (and the response payload may differ from sampler to sampler, hence the > need to have a sampler-specific post processor), and have a generic thread > group post processor which logs a message if the request fails. > > > > For example, the tree would be: > > > > Thread Group > > +-JSR223 Post Processor A > > +-Sampler > > +- JSR223 Post Processor B > > +- JSR223 Post Processor C > > > > The sequence order appears to be: > > Sampler > > Post Processor A > > Post Processor C > > Post Processor B > > > > If I add specific items to the MDC in Post Processor B, then with the > above execution order, they won’t be available in A or C. > > > > Would be keen to hear from others who’ve used MDC for additional logging > similar to this. > > > > Regards > > > > Andrew > > The information included in this email and any files transmitted with it > may contain information that is confidential and it must not be used by, or > its contents or attachments copied or disclosed to, persons other than the > intended addressee. 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