我踩过坑，解决方法，写一个多线程兼容的 handler 去处理

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class MultiCompatibleTimedRotatingFileHandler(TimedRotatingFileHandler):
def doRollover(self):
if self.stream:
self.stream.close()
self.stream = None
# get the time that this sequence started at and make it a TimeTuple
currentTime = int(time.time())
dstNow = time.localtime(currentTime)[-1]
t = self.rolloverAt - self.interval
if self.utc:
timeTuple = time.gmtime(t)
else:
timeTuple = time.localtime(t)
dstThen = timeTuple[-1]
if dstNow != dstThen:
if dstNow:
addend = 3600
else:
addend = -3600
timeTuple = time.localtime(t + addend)
dfn = self.baseFilename + "." + time.strftime(self.suffix, timeTuple)
# 兼容多进程并发 LOG_ROTATE
if not os.path.exists(dfn):
f = open(self.baseFilename, "a")
fcntl.lockf(f.fileno(), fcntl.LOCK_EX)
if not os.path.exists(dfn):
os.rename(self.baseFilename, dfn) # 释放锁 释放老 log 句柄
f.close()
if self.backupCount > 0:
for s in self.getFilesToDelete():
os.remove(s)
if not self.delay:
self.stream = self._open()
newRolloverAt = self.computeRollover(currentTime)
while newRolloverAt <= currentTime:
newRolloverAt = newRolloverAt + self.interval
# If DST changes and midnight or weekly rollover, adjust for this.
if (self.when == "MIDNIGHT" or self.when.startswith("W")) and not self.utc:
dstAtRollover = time.localtime(newRolloverAt)[-1]
if dstNow != dstAtRollover:
if (
not dstNow
): # DST kicks in before next rollover, so we need to deduct an hour
addend = -3600
else: # DST bows out before next rollover, so we need to add an hour
addend = 3600
newRolloverAt += addend
self.rolloverAt = newRolloverAt
`