Failover down but show slave status doesn't report failure

[Blake Acheson]

So my failover replica went down this morning with the error: "Semi-sync slave net_flush() reply failed".

That's fine, things fail. The problem is that everything looks fine when I run show slave status on this replica.

Slave_IO_Running = Yes

Slave_SQL_Running = Yes

Seconds_Behind_Master = 0

So basically I have a situation where everything looks fine from the application's perspective but nothing is replicating.

[Blake Acheson]

Furthermore the main screen shows a warning icon with "unavailable" as the message. Clicking down to the replica and the status is ok (green).

[Nicholas (Google Cloud Support)]

At first glance, this does not seem like intended behavior.  If you believe this to be an issue with the platform not behaving as documented or as intended, I'd recommend filing a new issue on the Issue Tracker.  Should you choose to do so, I recommend linking to this thread for context and posting a link to the public issue here so that others in the community can follow along.  Be sure to include the following:

• The exact command being run to confirm that the failover replica is down and where it was run.  This could also include logs or screenshots with timestamps
  
• The timestamp for when you run SHOW SLAVE STATUS on the replica which is giving you a potentially false positive.  This too could include logs or screenshots
  

Keep in mind that this Groups forum is best suited for general discussions and best practices.