Josh Elser created HBASE-19953:
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Summary: Avoid calling post* hook when procedure fails
Key: HBASE-19953
URL: https://issues.apache.org/jira/browse/HBASE-19953
Project: HBase
Issue Type: Bug
Components: master, proc-v2
Reporter: Ramesh Mani
Assignee: Josh Elser
Fix For: 2.0.0-beta-2
Ramesh pointed out a case where I think we're mishandling some post\*
MasterObserver hooks. Specifically, I'm looking at the deleteNamespace.
We synchronously execute the DeleteNamespace procedure. When the user provides
a namespace that isn't empty, the procedure does a rollback (which is just a
no-op), but this doesn't propagate an exception up to the
NonceProcedureRunnable in {{HMaster#deleteNamespace}}. It took Ramesh pointing
it out a bit better to me that the code executes a bit differently than we
actually expect.
I think we need to double-check our post hooks and make sure we aren't invoking
them when the procedure actually failed. cc/ [~Apache9], [~stack].
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