natehuangting opened a new issue, #18360:
URL: https://github.com/apache/shardingsphere/issues/18360
## Bug Report
### Which version of ShardingSphere did you use?
5.1.2
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
Using MySQLNormalReplicationDatabaseDiscoveryProviderAlgorithm, when the
result of 'show slave status' is null or the value of 'second_behind_master' is
null, it should be considered as delayed replication.
### Actual behavior
The replication delay value returned is 0.
```java
private long queryReplicationDelayMilliseconds(final Statement statement)
throws SQLException {
try (ResultSet resultSet = statement.executeQuery(SHOW_SLAVE_STATUS)) {
return resultSet.next() ? resultSet.getLong("Seconds_Behind_Master")
* 1000L : 0L;
}
}
```
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