Standby Node in the Need Repair (WAL) State

Symptom

The Need Repair (WAL) fault occurs on a standby node of openGauss.

Cause Analysis

The primary and standby DB instances are disconnected due to network faults or insufficient disk space. As a result, logs are not synchronized between the primary and standby DB instances, and the database fails to start.

Procedure

Run the gs_ctl build -D command to rebuild the faulty node. For details, see the build parameter in openGauss Tool Reference.