Troubleshoot AWS Advanced JDBC Wrapper configuration for Aurora Global Database write forwarding

Configuring the AWS Advanced JDBC Wrapper for Amazon Aurora Global Database with write forwarding requires Region-specific settings that are easy to get wrong. A real-world misconfiguration caused 5-second delays per plugin, failed topology resolution, and health check failures exclusively in the secondary Region. The root causes were using the aurora-mysql dialect instead of global-aurora-mysql, cluster endpoint format instead of instance endpoint format in host patterns, and the failover2 plugin instead of gdbFailover. Two Aurora-side settings are also commonly missed: aurora_replica_read_consistency must be set per session for write forwarding to engage, and connection pools must be sized under the aurora_fwd_writer_max_connections_pct ceiling. Complete tested YAML configurations for both primary and secondary Regions are provided, along with SQL restrictions (isolation level, savepoints, XA transactions, DDL, LOAD statements) that apply when write forwarding is active.

Source: https://aws.amazon.com/blogs/database/troubleshoot-aws-advanced-jdbc-wrapper-configuration-for-aurora-global-database-write-forwarding. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.