Description
- NPrinting reports fail to render when images are included
- Note: NP Engine and NP scheduler may also be in an non functional state
Environment
Resolution
Diagnosis:
- Check for the following error in the following log file "nprinting_engine_cef.log"
- "RabbitMq server is not connected - trying diagnoser queue creation again in 10 seconds".
"Error in connection establishment: net::ERR_CONNECTION_CLOSED"
- Search the windows system event logs for SChannel errors first on the NPrinting Server and NPrinting Engine computers then also on the Qlik Sense server
- If you see either or both of these, please proceed to the resolution below
Solution:
- Engage with the customer or partner IT department
- Ensure TLS 1.2 is enabled on the NPrinting and or Qlik Sense Server. This is a requirement:
Recommend Using IISCrypto (or customer's own preferred method) to check for TLS 1.2 and enabled or missing ciphers
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_RSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_128_GCM_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA
Minimum cipher requirements on the Qlik Sense server machines which NPrinting connects to:
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
Cause
- Minimum Cipher requirements and or TLS requirements are not met for the version of NPrinting current running
- There is NOT at least one common cipher on the NPrinting and Qlik Sense server
Related Information:
