Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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2.1.13
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None
Description
With a four server setup consisting of two master-slave pairs, A→B and C→D where A and C are masters, configuring C to replicate from A will form a multi-tiered replication topology (i.e. C will be a relay master).
|
"Before stopping IO thread" |
Servers.
|
-------------------+-----------------+-------+-------------+--------------------
|
Server | Address | Port | Connections | Status
|
-------------------+-----------------+-------+-------------+--------------------
|
server1 | 127.0.0.1 | 3000 | 0 | Master, Running
|
server2 | 127.0.0.1 | 3001 | 0 | Slave, Running
|
server3 | 127.0.0.1 | 3002 | 0 | Relay Master, Slave, Running
|
server4 | 127.0.0.1 | 3003 | 0 | Slave, Running
|
-------------------+-----------------+-------+-------------+--------------------
|
When the IO thread on C (server3) is stopped, it will be "promoted" as a master server.
|
"After stopping IO thread" |
Servers.
|
-------------------+-----------------+-------+-------------+--------------------
|
Server | Address | Port | Connections | Status
|
-------------------+-----------------+-------+-------------+--------------------
|
server1 | 127.0.0.1 | 3000 | 0 | Master, Running
|
server2 | 127.0.0.1 | 3001 | 0 | Slave, Running
|
server3 | 127.0.0.1 | 3002 | 0 | Master, Running
|
server4 | 127.0.0.1 | 3003 | 0 | Slave, Running
|
-------------------+-----------------+-------+-------------+--------------------
|
If C disconnects from A, it should not be treated as a master server.