Werk #16801: Custom graphs: Fix crash in case of unavailable scalars
| Component | Metrics system |
| Title | Custom graphs: Fix crash in case of unavailable scalars |
| Date | Apr 23, 2024 |
| Checkmk Edition | Checkmk Enterprise (CEE) |
| Checkmk Version | 2.3.0 2.4.0b1 |
| Level | Trivial Change |
| Class | Bug Fix |
| Compatibility | Compatible - no manual interaction needed |
When adding a scalar to a custom graph, it is possible that no value is available for this scalar. For example, this is the case when adding the CRIT threshold of a metric for which no thresholds are configured. In such cases, no graph was rendered. Instead, the Checkmk UI displayed the message "Cannot calculate graph recipes" and showed a traceback.
This werk restores the correct behavior: No lines are rendered for unavailable scalars and they are denoted with "n/a" in the graph legend.
