Facing Issue in the iModel Presentation API (2.19.2)

[pahm3y]

We are observing below error during the external attribute extraction using the Presentation APIs:
D:\Siemens\Teamcenter14\TC_ROOT\CALM_Utilities\Plantcad2Tc\node_modules@bentley\presentation-backend\lib\presentation-backend\NativePlatform.js:120
const pollResult = this._nativeAddon.pollResponse(requestGuid);
^
Error: Unknown failure
at Timeout._onTimeout (D:\Siemens\Teamcenter14\TC_ROOT\CALM_Utilities\Plantcad2Tc\node_modules@bentley\presentation-backend\lib\presentation-backend\NativePlatform.js:120:58)
at listOnTimeout (internal/timers.js:554:17)
at processTimers (internal/timers.js:497:7)
we are calling the following API:
content = await Presentation.getManager().getContent({requestContext: ClientRequestContext.current, imodel: iModel,
rulesetOrId: ruleSet , descriptor: overrides, keys: keySet});
where ruleset is defined as below:
const ruleSet: Ruleset = { id: properties, rules: [{ ruleType: RuleTypes.Content, specifications: [{ specType: ContentSpecificationTypes.SelectedNodeInstances, acceptableSchemaName: schemaName, acceptableClassNames: classNames, acceptablePolymorphically: true, }] }], };
"schemaName = PDMxPlant_Chevron"
"classNames = [ "ATTACHMENT", "BPANEL", "ELBOW", "FITTING", "FLUID_PORT", "FTUBE", "GASKET", "GENSEC", "NOZZLE", "PANEL", "PORT", "REDUCER", "SCTN", "STRUCTURE", "SUBSTRUCTURE", "TEE", "TMPLATE", "TUBE", "WELD"];
"The count of value in the keyset is 28650."

IModelJS library version : 2.19.2

[aruniverse]

Have you tried the latest 2.19.x version?

[grigasp]

The error doesn't originate from us, so it's hard to tell what it means without additional details. Could you get a trace level log for the “ECPresentation” logger namespace or provide access to your iModel?

One red flag is that the request is not paged. A content response for nearly 30k elements is going to be a massive JSON, so the first thing I'd try would be to request content in pages. At our RPC layer we force a max page size of 1k.

[pahm3y]

What would be the API or settings to request the content in pages. I am using the iModelJS version 2.19.2 and cannot use any other version as of now.

[grigasp]

The requestOptions you pass to getContent is Paged, which means you can pass pageOptions as one of the parameters.