Chetan Mehrotra created OAK-3952:
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Summary: BackgroundObserver close should wait for stop to be
processed
Key: OAK-3952
URL: https://issues.apache.org/jira/browse/OAK-3952
Project: Jackrabbit Oak
Issue Type: Improvement
Components: core
Reporter: Chetan Mehrotra
Assignee: Chetan Mehrotra
Priority: Minor
Fix For: 1.4
{{BackgroundObserver}} close method currently says that it does not wait for
thread to finish. This can lead to situation when during shutdown the backing
{{NodeStore}} goes away while the background thread is still busy with diff and
that would lead to exceptions in the log.
As being done in OAK-3923 the close call should wait for {{STOP}} signal to be
processed before returning from close call.
On side note we should also provide an option where the close call should wait
for the queue to be processed instead of just silently clearing the queue which
can lead to potential loss of important local events. Note that can happen for
proper ordered shutdown!
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