[MapServer-users] Cluster style crashes MapServer 8

[Seth G]

Hi,

A couple of things to try to narrow down the issue:

1. If you are able to export the PostGIS layer to a shapefile, then you can change the DATA of the layer and see if there is still a crash. 
2. Is there an EXTENT set on the layer? I ran into an issue using MS SQL [1] and clustering. Try adding one manually. 

Seth


[1] https://github.com/MapServer/MapServer/pull/6278

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On Tue, Jun 11, 2024, at 9:31 AM, Jaques Tati via MapServer-users wrote:
> Hi There,
>
> in our application we're upgrading our v7.6 MapServer to v8.01.
> Everything seems to work good so far but we have one layer that uses
> Clustering of points
> and whenever this layer should be displayed MapServer 8 crashes
> reproducably.
>
> This layer works flawless in v7.6 and clustering is setup exactly from
> the book.
> When i comment clustering out, the layer is displayed, so all other
> style features do work.
> Datasource is a PostGIS layer, webserver is Apache 2.4.59.
>
> Looking at the debug output, the data comes back as expected from the
> database,
> even clustering is logged and no error in the MapServer-Logfile.
> The crash is reported in Windows Application-Eventlog with only cryptic
> reasons that do
> not really result in any valid answers when googling.
> ..there is a word "StackHash" included that might point to DEP
> (DataExecutionPrevention)
> of Windows, - but since all other layers do work with the MapServer-Exe
> it would be hard
> to understand why windows does prevent the output of clustered layers.
>
> We're using Windows Server 2022 21H2 Datacenter Edition, 8 CPU 32GB RAM.
>
> Anyone heard of this crude behaviour, I'm running out of ideas?
>
> Thanks in advance for any hint
>
> SH
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