8 hours ago
Postgres-F-QV (Service ID: 8bd85f54-4f65-459f-a9be-b45d25fc1446)
Last deployment: Feb 3, 2026
Error: FATAL: the database system is not yet accepting connections - Consistent recovery state has not been yet reached
Root cause: Collation version mismatch (glibc 2.36 → 2.41) caused by container image update
Data: Critical production data stored here
1 Replies
8 hours ago
This thread has been opened as a bounty so the community can help solve it.
Status changed to Open Railway • about 8 hours ago
3 hours ago
Hey @m50s79sm6srnp8jn,
This is a **critical production issue** caused by a glibc version mismatch (2.36 → 2.41) after the container image was updated. PostgreSQL is refusing connections because the stored collation version no longer matches the OS-provided version.
**Root Cause:** The `postgres:16` image was rebuilt with a newer glibc (2.41), but your database files were created with glibc 2.36. PostgreSQL detects this mismatch and enters recovery mode, blocking all connections to prevent potential index corruption.
**The Fix (Production-Safe):**
Step 1: Access the container shell via Railway dashboard or CLI
Step 2: Run the following commands to rebuild indexes and refresh collation versions:
```sql
-- Rebuild all indexes first (prevents corruption)
REINDEX DATABASE postgres;
ALTER DATABASE postgres REFRESH COLLATION VERSION;
ALTER DATABASE template1 REFRESH COLLATION VERSION;
-- Repeat for every production database:
REINDEX DATABASE your_db_name;
ALTER DATABASE your_db_name REFRESH COLLATION VERSION;Step 3: Restart the container from Railway dashboard
Alternative (if container is completely unresponsive):
- Create a new Postgres service with a pinned image tag (e.g.,
postgres:16.4instead ofpostgres:16) - Restore from your latest backup
- To prevent this in the future, pin the exact image digest instead of using floating tags
Prevention:
- Always pin PostgreSQL image to a specific digest:
postgres:16@sha256:... - Test image updates in staging before production
- Keep automated backups (Railway has built-in backup for Postgres services)
This is a well-documented PostgreSQL behavior when glibc versions change. The REINDEX + REFRESH COLLATION VERSION approach is the official PostgreSQL-sanctioned fix.
Let me know if you need help with any step!