Bug 11892

Summary: Missing workflow for identifying taskhash errors
Product: [Build System, Metadata & Runtime] BitBake Reporter: Svein Seldal <sveinse>
Component: bitbakeAssignee: Richard Purdie <richard.purdie>
Status: RESOLVED FIXED QA Contact:
Severity: enhancement    
Priority: Medium CC: mark.asselstine, poky.bs.watcher, poky.watcher, randy.macleod
Version: 2.1.2   
Target Milestone: 5.99   
Hardware: x86   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: Don't know

Description Svein Seldal 2017-08-03 16:26:17 UTC 
Recipes and images might and will contain sigdata that change from one run to the next, deliberately or inadvertently. Unless taken proper care of the result is very often a "taskhash mismatch" error. However, the root cause for taskhash mismatch errors is often extremely difficult to find. My personal experience is that workdays have been lost due to them.

On a general level, bitbake is missing methods for efficiently identifying "taskhash mismatch" errors. The root cause might be poorly or wrongly written recipes, but the tools should be able to highlight where the failure is originating from.
Comment 1 Richard Purdie 2017-08-13 12:52:59 UTC 
https://www.kc8apf.net/2017/01/tired-of-taskhash-mismatch/ has some info about this.
Comment 3 Randy MacLeod 2023-10-24 14:24:26 UTC 
Bulk move from 4.99 or 0.00 to 5.99
Comment 4 Richard Purdie 2026-03-20 14:05:14 UTC 
Significant work was done on this during the STF projects. If there is a specific case where it is still hard to identify the cause, we should document the specific cases so we can find ways to improve them. Resolve this bug as the base work was completed.