Zach York created HBASE-24922:
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Summary: InitMetaProcedure create Namespace is not Idempotent
Key: HBASE-24922
URL: https://issues.apache.org/jira/browse/HBASE-24922
Project: HBase
Issue Type: Bug
Components: meta, Region Assignment
Affects Versions: 3.0.0-alpha-1
Reporter: Zach York
If InitMetaProcedure is retried after creating at least one namespace
directory:
https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/InitMetaProcedure.java#L115,
it will not be able to recover as the procedure does not check for existence
of the directories before attempting to create them.
We should check for existence of the directory first and only execute
createDirectories if they do not exist. The rest of the procedure looks like it
is idempotent. We can additionally optimize to not overwrite the column
families.
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