Josh Elser created ACCUMULO-3634:
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Summary: AuthenticationTokenSecretManager might delete key while
ZooAuthenticationKeyWatcher enumerates existing keys
Key: ACCUMULO-3634
URL: https://issues.apache.org/jira/browse/ACCUMULO-3634
Project: Accumulo
Issue Type: Bug
Components: master, tserver
Reporter: Josh Elser
Assignee: Josh Elser
Priority: Minor
Fix For: 1.7.0
Noticed the following race condition.
The secret manager (in the master) on startup will enumerate the old keys used
for creating delegation tokens and delete the keys that are expired.
At the same time, the watcher (in each tserver) might see some updates to these
keys and update the secret manager. There's a race condition there that the
watcher might try to read a key that the secret manager just deleted.
Need to catch the NoNodeException in the watcher and just accept that it's ok
if one of these children are deleted to avoid a scary error in the monitor.
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