Github user wy96f commented on the issue:
https://github.com/apache/activemq-artemis/pull/2444
> I am a bit confused as a file.close would issue a sync.
It won't. As man page said:
A successful close does not guarantee that the data has been successfully
saved to disk, as the kernel defers writes. It is not common for a file system
to flush the buffers when the stream is closed. If you need to be sure that
the data is physically stored use fsync(2). (It will depend on the disk
hardware at this point.)
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