发布时间: 2019-08-29 00:52:00
参考：https://github.com/paritytech/parity-ethereum/issues/10997
步骤：
OK, it seems that to close an Parity daemon, we should :
step1. $ kill -1 [pid]
step2. wait for several minutes. (more than 90 s ?)
step3. if parity still alive, $ kill -9 [pid]
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