Github user anmolnar commented on the issue:
https://github.com/apache/zookeeper/pull/475
I know what the problem is. 3.4.11 has a bug that swaps dataDir and
dataLogDir from config file.
Sorry, it's only mentioned briefly on the release page:
http://zookeeper.apache.org/releases.html
> WARNING: ZOOKEEPER-2960 was recently identified as a regression in 3.4.11
...
Please wait for 3.4.12 for the fix and in the meantime you can probably
workaround it with your fix, but it should not be merged in the codebase.
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