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Cluster: don't update slave's master if we don't know it.
There is no way we can update the slave's node->slaveof pointer if we don't know the master (no node with such an ID in our tables).
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@ -1363,7 +1363,7 @@ int clusterProcessPacket(clusterLink *link) {
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}
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/* Master node changed for this slave? */
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if (sender->slaveof != master) {
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if (master && sender->slaveof != master) {
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if (sender->slaveof)
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clusterNodeRemoveSlave(sender->slaveof,sender);
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clusterNodeAddSlave(master,sender);
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