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Nprinting Log ERROR: CEF rendering exception. GRPC rendering request failed, error: One or more errors occurred - Problem with port 443

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Sonja_Bauernfeind
Digital Support
Digital Support

Nprinting Log ERROR: CEF rendering exception. GRPC rendering request failed, error: One or more errors occurred - Problem with port 443

User cannot generate the reports or make a preview of any image in NPrinting November18. It shows error CEF rendering exception. GRPC rendering request failed

If the xlsx report is created and object is inserted as image (default trend chart of Qlik Sense), report or preview cannot be generated, causing an error. Table is generated correctly. Qlik Sense is in version April 2018.

Error:

The preview request failed with message: Object --- of Sense app  --- to render. ERROR: 
CEF rendering exception. GRPC rendering request failed. ERROR: System.AggregateException: One or more errors occurred.


The preview request failed with message CEF rendering exception.png

 

In Nprinting logs :

Engine.Navigator.QlikSense.SDK    18.19.6.0    Engine.Navigator.QlikSense.SDK.SenseNavigator    20181126T200808.569+02:00    WARN    TFIUDMZQSNP01        0    0    0    0    0    0    0    0    Content request a92510eb-6281-4032-b509-c4066ca8036f: resolution ended unsuccessfully with exception System.Exception: Object JmFscyy*of Sense app *0aa3bfb1-dcf8-48a7-9448-3797135352b0 failed to render. ERROR: CEF rendering exception. GRPC rendering request failed, error: One or more errors occurred..            

 

Engine.Navigator.QlikSense.SDK    18.19.6.0    Engine.Navigator.QlikSense.SDK.SenseNavigator    20181126T211431.758+02:00    WARN    TFIUDMZQSNP01        0    0    0    0    0    0    0    0    Content request 69c7613b-b883-4634-846a-8ea2d4776f5e: resolution ended unsuccessfully with exception System.Exception: Object rENBpL*of Sense app *0aa3bfb1-dcf8-48a7-9448-3797135352b0 failed to render. ERROR: CEF rendering exception. GRPC rendering request failed, error: One or more errors occurred..   

 

Environment:

Qlik NPrinting 

 

The renderer uses https protocol to navigate the hub, like a common browser. Since port 443 is used for https protocol, if a rule is blocking https traffic from NPrinting engine machine to Qlik Sense server, engine couldn't export images. Requests for tables and other objects use ports 4242 and 4747 connecting directly to the Sense engine, so this is why they were working.

 

Resolution:

 

  1. Verify if the Nprinting and Qlik sense server have matching and aligned cipher suites.
    See Nprinting designer error when previewing report with image - CEF rendering request failed, error: On... for details.  
  2. Allow https traffic through 443 as well as Websocket traffic between clients and server.
  3. If a different port is used, modify the connection to have the correct port identifier in the proxy address.
    Example: Proxy Address:  https://servername.domain.local:<portnumber>.




 

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Last update:
‎2021-06-02 06:50 AM
Updated by:
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