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https://issues.apache.org/jira/browse/WHIRR-329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051317#comment-13051317
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Andrei Savu commented on WHIRR-329:
-----------------------------------
I've spent some time reading on this subject. I will create a file lock by
using the FileLock Java as suggested:
* Docs:
http://download.oracle.com/javase/1.4.2/docs/api/java/nio/channels/FileLock.html
* Example: http://www.exampledepot.com/egs/java.nio/SetFileLock.html
* Similar scenario: http://stackoverflow.com/questions/2045734/java-file-locking
and use the ZooKeeper 3.3.3 client for a distributed lock (and state
persistence in a new JIRA). Tibor is this good enough for you?
> Ensure the same cluster can't be started twice
> ----------------------------------------------
>
> Key: WHIRR-329
> URL: https://issues.apache.org/jira/browse/WHIRR-329
> Project: Whirr
> Issue Type: Improvement
> Reporter: Andrei Savu
> Assignee: Andrei Savu
>
> We should add some sort of distributed locking mechanism so that we can be
> sure that the same cluster can't be started twice. Tibor was the first one to
> raise this issue.
> Could a blobstore be used for locking?
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