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Here is a ugly code from replication-manager to detect if a server is a slave
var ss dbhelper.SlaveStatus
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ss, _, errss := dbhelper.GetSlaveStatus(server.Conn, server.ClusterGroup.Conf.MasterConn, server.DBVersion)
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// We have no replicatieon can this be the old master
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// 1617 is no multi source channel found
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noChannel := false
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if errss != nil {
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if strings.Contains(errss.Error(), "1617") || strings.Contains(errss.Error(), "3074") {
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// This is a special case when using muti source there is a error instead of empty resultset when no replication is defined on channel
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// server.ClusterGroup.LogPrintf(LvlInfo, " server: %s replication no channel err 1617 %s ", server.URL, errss)
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noChannel = true
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}
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}
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if errss == sql.ErrNoRows || noChannel {
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As notice any reason not to send an empty result for show slave status for channel ? Get a consistant result with a regular show slave status , this issue is also in upstream but to make it harder error number is different
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