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由 antirez 提交于
This commit fixes issue #875 that was caused by the following events: 1) There is an active child doing BGSAVE. 2) flushall is called (or any other condition that makes Redis killing the saving child process). 3) An error is sensed by Redis as the child exited with an error (killed by a singal), that stops accepting write commands until a BGSAVE happens to be executed with success. Whitelisting SIGUSR1 and making sure Redis always uses this signal in order to kill its own children fixes the issue.
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