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From "Peter Davis (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-3925) Default log.dir=/tmp/kafka-logs is unsafe
Date Sat, 02 Jul 2016 19:04:11 GMT
Peter Davis created KAFKA-3925:

             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:
         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=0o9VQ@mail.gmail.com%3e).
 I've also been bitten by this. 

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