[MXS-31] bugzillaId-663: MySQL Monitor: claims that slave was last known master. Created: 2014-01-29  Updated: 2019-12-19

Status: Closed
Project: MariaDB MaxScale
Component/s: mariadbmon, Plugin
Affects Version/s: 1.0.0
Fix Version/s: 1.1.0

Type: Bug Priority: Minor
Reporter: Timofey Turenko Assignee: Massimiliano Pinto (Inactive)
Resolution: Unresolved Votes: 0
Labels: None
Environment:

Linux


 Description   

This is imported from bugzilla item: http://bugs.mariadb.com/show_bug.cgi?id=663

Vilho Raatikka 2014-12-29 14:17:00 UTC
Monitor logic is invalid when it attempts to find out who was the last known master.

Reproduce by starting MaxScale so that master is not responsive. While monitor tries to find the master fail one of the slaves. After a while monitor starts to log invalid information about backend roles:
—
2014-12-29 16:16:09 Error : No Master can be determined. Last known was 127.0.0.1:3001
2014-12-29 16:16:29 Error : No Master can be determined. Last known was 127.0.0.1:3001
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