Error when running GeoOperation Simplify(): Connector reply error: grpc::StatusCode::CANCELLED: 'Received RST_STREAM with error code 8'

[Vicky_Z]

Running GeoOperation Simplify() in the script, the following error is received: 

Error when running GeoOperation Simplify(): Connector reply error: grpc::StatusCode::CANCELLED: 'Received RST_STREAM with error code 8'

Resolution

Option 1:

Reduce the records to be loaded to locate the particular one failing the script.  You may choose to discard or simplify the record.

Option 2:

Request the simplified data, for example,  lower resolution areas, from the Geodata provider

Option 3:

Simplify the Geo data beforehand with some tools, such as QGIS (desktop) https://qgis.org/ or GDAL (batch) https://gdal.org/.

 Note: These tools are developed by third party and Qlik does not provide support for these tools

Option 4:

Simplify the data at load or load simplify one record at the time in runtime, when the user selects one record using the GeoReduceGeometry() function.

The output is not as nice as Simplify, holes may occur. 

https://help.qlik.com/en-US/cloud-services/Subsystems/Hub/Content/Sense_Hub/Scripting/GeospatialFunc...

Map:
LOAD Name,
GeoReduceGeometry(LocationPolygon, 0.5) as [ReducedArea]
resident MapSource Group By Name;

 

Cause

The error is triggered if the data being loaded is too detailed,  causing at least one of the rows to be larger than 4MB which causes the Sense Engine to fail it. Engine limits the size of a reply from a Server Side Extension to 4MB and the smallest reply that geo-operations can send back is a single row.

Environment

• Qlik Enterprise SaaS with Geocoding