Arbitrum-Sepolia: Block ingestor lagging behind

Incident Report for The Graph

Resolved

This incident has been resolved.
Posted Sep 23, 2025 - 18:06 UTC

Investigating

[FIRING:1] Arbitrum-Sepolia: Block ingestor lagging behind Production (partial_outage indexers P2-High true Tech Support)
https://thegraph.grafana.net/alerting/list

**Firing**

Value: [no value]
Labels:
- alertname = Arbitrum-Sepolia: Block ingestor lagging behind
- cmp = partial_outage
- component = indexers
- grafana_folder = Production
- priority = P2-High
- statuspage = true
- team = Tech Support
Annotations:
- Error = [sse.dataQueryError] failed to execute query [A]: unexpected response with status code 526: error code: 526
- description = Triggered when the block ingestor is lagging
- grafana_state_reason = Error
- statuspage = Arbitrum-Sepolia: Block ingestor lagging behind
Source: https://thegraph.grafana.net/alerting/grafana/edjeivgjdk54wd/view?orgId=1
Silence: https://thegraph.grafana.net/alerting/silence/new?alertmanager=grafana&matcher=__alert_rule_uid__%3Dedjeivgjdk54wd&matcher=cmp%3Dpartial_outage&matcher=component%3Dindexers&matcher=priority%3DP2-High&matcher=statuspage%3Dtrue&matcher=team%3DTech+Support&orgId=1
Dashboard: https://thegraph.grafana.net/d/7rcuDImZk?from=1758646530000&orgId=1&to=1758650167906
Panel: https://thegraph.grafana.net/d/7rcuDImZk?from=1758646530000&orgId=1&to=1758650167906&viewPanel=139
Posted Sep 23, 2025 - 17:56 UTC