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100cb89f3e
This commit avoids a situation where we might stack overflow in the auto-follower coordinator. In the face of repeated failures to get the remote cluster state, we would previously be called back on the same thread and then recurse to try again. If this failure persists, the repeated callbacks on the same thread would lead to a stack overflow. The repeated failures can occur, for example, if the connect queue is full when we attempt to make a connection to the remote cluster. This commit avoids this by truncating the call stack if we are called back on the same thread as the initial request was made on.
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