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We have data intense rasterization workspace (which we can share via dropbox) using Mapnik. The workspace is run with Red hat 7 / FME 2017.1.1.1. The server has sufficient memory and cpu capabilities and it is working fine with smaller data sets.

The desktop is also FME 2017.1.1.1 version and the fmeserver user has sufficient rights (root + https://knowledge.safe.com/articles/718/fme-server-troubleshooting-guide-testing-permissio.html ).

Checked the logs and it reports "No message length returned in FME Engine reponse" and restarts.

Can anyone help?

Is the FME Engine running on the same machine as the FME Server Core?

Yes they are on the same machine.

We are trying new approach with ffs store (https://knowledge.safe.com/articles/449/error-reading-large-number-of-raster-files.html) to reduce the memory usage.

FFS store helped with the memory consumption but now Mapnik is complaining (Could not write to empty stream) and job was cancelled.

Follow-up: after setting up the FME_TEMP variable to the server we were are able to run the job. Note that FME_TEMP needs to be set on rc file NOT on .profile.

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