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Jay Guo authored
`Propose` and `ProposeConfChagen` block when node is leaderless. However they are currently invoked by the same go routine that consumes data from applyC, which processes SoftState to reflect leader change. This may lead to deadlock: - block is created on leader and about to be `Propose`ed, - leader steps down due to loss of quorum - `Propose` is called and blocks - SoftState is passed on applyC - `serveRequest` is not able to consume applyC - deadlock Change-Id: If4dc048f82983862b5f253231dafd513b442bf53 Signed-off-by: Jay Guo <guojiannan1101@gmail.com>