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https://issues.apache.org/jira/browse/ZOOKEEPER-2625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15647827#comment-15647827
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Arne Bachmann commented on ZOOKEEPER-2625:
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I found the issue. As I suspected, the reason for data? is actually a data^M 
which translates into a \r character.

The following code executed in the bin/ folder resolved the issue:
perl -p -i -e "s/\r//g" *.sh

This converts line endings from Windows mode into Linux mode, which one would 
expect to find in the zk.tar.gz anyway.
I'm not sure if I should create a pull request or patch, as this seems to be 
more of a problem with the developer's build chain, rather a simple code fix.

If anybody is interested, I can zip my Vagrant code that sets up distributed 
zookeeper instances inside Virtualbox containers (which may be a bad practice, 
as there is only ephemeral disk storage).

> zkServer.sh creates PID file in the folder data?/ instead of data/
> ------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2625
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2625
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 3.5.2
>         Environment: Linux vagrant-ubuntu-trusty-32 3.13.0-100-generic 
> #147-Ubuntu SMP Tue Oct 18 16:49:53 UTC 2016 i686 i686 i686 GNU/Linux
>            Reporter: Arne Bachmann
>            Priority: Minor
>
> I provision a vagrant vm that installs zookeeper into /home/vagrant/zk and 
> adjusts all owner and read/write rights.
> With the vagrant user, I start zookeeper as bin/zkServer.sh start 
> /vagrant/data/zoo.cfg
> However, the folder data? (or data^M) gets created with the PID inside, 
> instead of putting it into the data folder, which contains the version-2 
> folder.
> Since I'm using the official start scripts, I'm at a loss.
> Also, the data? folder comes with root:root ownership, which is strange, as 
> zKServer.sh is executed from the vagrant user.



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