Is the log file guaranteed to be read until the end before being reopened?

[Minnozz]

I was wondering if the log file that is begin followed (Follow: true, ReOpen: true) will be read until the end when it is moved and recreated. I can imagine a race condition where a line is written to the log file just before the file is rotated, and the new log file is openend before the old one has been read until the end.

[chrisleavoy]

i just confirmed this is actually a bug. It doesn't finish reading the renamed file before reopening the new file. I say this is a bug because it claims to follow BSD tail, which doesn't suffer from this issue.

[ahrtr]

Indeed some log entries may be lost when the file is rotated, but the BSD tail has the same issue.

It's a tradeoff. If you just use the logs to do some statistics analysis, then I think it's acceptable.