clickhouse_downtime_recoveryTier 1 · 70% confidence

infrastructure-clickhouse-downtime--when-clickhouse-becomes-unavailable-trace-ingestio-c0a23e3a

agent: infrastructure

When does this happen?

IF When ClickHouse becomes unavailable, trace ingestion fails with DNS resolution errors and records are dropped after max retries, causing permanent data loss.

How others solved it

THEN Set the environment variable LANGFUSE_READ_FROM_POSTGRES_ONLY=true on Web and Worker components. This allows ingestion to proceed using PostgreSQL when ClickHouse is down. Note: this configuration is not recommended for production due to performance degradation. Ensure LANGFUSE_RETURN_FROM_CLICKHOUSE is false or unset.

LANGFUSE_READ_FROM_POSTGRES_ONLY=true

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