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Explanations for skipped resources in LQE and LDX

If you have gathered the basic information needed to understand why some resources are skipped in LDX / LQE, you can proceed with the investigation.

Below, you will find some typical observations, the causes behind those, and how you might want to proceed to get them fixed.

No message when showing details, too many requests

Observations

In the skipped resources list stands a column holding the HTTP Response Code. The corresponding value for the skipped resource is 429.

HTTP error code 429 is a way for a server to tell a client that it is sending Too many requests.

This has been seen mulitple time accompanied by an absence of message when clicking on the Show details link inside LQE / LDX.

Causes

This is usually because of one of the following reasons

  • a Jira Administrator has enabled the Rate Limiting feature (available since Jira Data Center 8.6);

  • the Jira architecture includes a reverse proxy, and the reverse proxy administrator has implemented rate limiting rules.

In both cases, the rules are too restrictive to let LDX and LQE properly read through all resources.

Resolution

When using the integrated Rate Limiting feature, you should consider leveraging the Allowlisting URLs and resources in the Rate Limiting feature documentation. It is possible to disable the rate limiting on a Consumer Oauth (and use the LQE/LDX Consumer key(s)) or on specific paths to allow calls to /**/rest/oslc/**.

For more precision, we would suggest using a reverse proxy to manage the exclusion rules for rate limiting.

Deleted/Moved Artifacts

Observations

In the skipped resources list stands a column holding the HTTP Response Code. The corresponding value for the skipped resource is 404.

HTTP error code 404 is stating that an artifact is not found.

Causes

This is usually because of one of the following reasons

  • A Jira Ticket has been Deleted

  • A Jira Ticket has been Moved to a different project

Resolution

A rebuild of the TRS feed will allow these dangling artifacts to be removed. However, there is little issue with having them remain not found for a period of time.

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