[jira] [Created] (HBASE-20279) [tooling] check for incompatible environment for HBase 2.0 upgrade

["Sean Busbey (JIRA)" <ji...@apache.org>]

Sean Busbey created HBASE-20279:
-----------------------------------

             Summary: [tooling] check for incompatible environment for HBase 2.0 upgrade
                 Key: HBASE-20279
                 URL: https://issues.apache.org/jira/browse/HBASE-20279
             Project: HBase
          Issue Type: Sub-task
          Components: documentation, tooling
    Affects Versions: 2.0.0
            Reporter: Sean Busbey


from [~stack] on HBASE-19158:

{quote}
bq. Server failure. HBase can still read HFiles written in the older version 2 format.

Need a script that user can run pre-upgrade.
{quote}

Additional commentary from [~busbey]

In addition to the config check stack mentions, such a tool could check

* other problematic configs, like those for master-hosts-regions
* inconsistent configs due to changed defaults (I think we should have some smell-tests around the change in default for hbase.security.authorization)
* (optionally) check for unreadable WALs
* (optionally) check for unreadable hfiles



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