Peter Davis created KAFKA-3925:
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Summary: Default log.dir=/tmp/kafka-logs is unsafe
Key: KAFKA-3925
URL: https://issues.apache.org/jira/browse/KAFKA-3925
Project: Kafka
Issue Type: Bug
Components: config
Affects Versions: 0.10.0.0
Environment: Various, depends on OS and configuration
Reporter: Peter Davis
Many operating systems are configured to delete files under /tmp. For example
Ubuntu has
[tmpreaper](http://manpages.ubuntu.com/manpages/wily/man8/tmpreaper.8.html),
others use tmpfs, others delete /tmp on startup.
Defaults are OK to make getting started easier but should not be unsafe
(risking data loss).
Something under /var would be a better default log.dir under *nix. Or relative
to the Kafka bin directory to avoid needing root.
If the default cannot be changed, I would suggest a special warning print to
the console on broker startup if log.dir is under /tmp.
See [users list
thread](http://mail-archives.apache.org/mod_mbox/kafka-users/201607.mbox/%3cCAD5tkZb-0MMuWJqHNUJ3i1+xuNPZ4tnQt-RPm65grxE0=0o...@mail.gmail.com%3e).
I've also been bitten by this.
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