Problem
Some TiCDC Grafana dashboards use stacked graph panels. When a stacked panel keeps the default null handling (nullPointMode: "null"), a single series with missing points can make the stacked visualization misleading or broken in Grafana.
For stacked panels, null values should be rendered as zero so gaps in one series do not corrupt the visual stacking of the remaining series.
Affected dashboards
The current TiCDC fix touches:
metrics/grafana/ticdc_new_arch.jsonmetrics/nextgengrafana/ticdc_new_arch_next_gen.json
Expected contract
For every legacy Grafana graph panel with stack enabled:
- panel or series override has
"stack": true
- the same panel should use
"nullPointMode": "null as zero"
Non-stacked panels should not be changed only because they have nullPointMode.
Related fix
PR: #5008
The PR updates stacked Grafana panels to render null values as zero and verifies the dashboard JSON structurally.
Problem
Some TiCDC Grafana dashboards use stacked graph panels. When a stacked panel keeps the default null handling (
nullPointMode: "null"), a single series with missing points can make the stacked visualization misleading or broken in Grafana.For stacked panels, null values should be rendered as zero so gaps in one series do not corrupt the visual stacking of the remaining series.
Affected dashboards
The current TiCDC fix touches:
metrics/grafana/ticdc_new_arch.jsonmetrics/nextgengrafana/ticdc_new_arch_next_gen.jsonExpected contract
For every legacy Grafana graph panel with stack enabled:
"stack": true"nullPointMode": "null as zero"Non-stacked panels should not be changed only because they have
nullPointMode.Related fix
PR: #5008
The PR updates stacked Grafana panels to render null values as zero and verifies the dashboard JSON structurally.