flirmnave commented on pull request #1809:
URL: https://github.com/apache/ozone/pull/1809#issuecomment-762022728
Hi, @amaliujia ,
The following is my test process.
I deploy two version Ozone on my local cluster,
One is from master, the other is from this branch.
And modify the **ozone-site.xml**, delete the **ozone.recon.db.dir**.
On master build without **ozone.recon.db.dir**,
It will create a directory named **${ozone.recon.db.dir}** on Ozone start
directory.

On this branch build without **ozone.recon.db.dir**,
When **${ozone.recon.db.dir}** is not configured,
it will fallback to **ozone.metadata.dirs**.
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