Csaba Varga created JCR-4126:
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Summary: Shared FileDataStore throws exception if two processes
try to add the same file concurrently
Key: JCR-4126
URL: https://issues.apache.org/jira/browse/JCR-4126
Project: Jackrabbit Content Repository
Issue Type: Bug
Components: jackrabbit-data
Affects Versions: 2.15.1
Reporter: Csaba Varga
Priority: Minor
The FileDataStore implementation can throw an IOException if multiple
repositories share the same data store and multiple repositories try to add the
same record at the same time. This can happen easily when you set up multiple
AEM publisher instances to share the same data store to save disk space. (AEM
uses Oak, but the Oak file blobstore implementation ends up using the
Jackrabbit FileDataStore implementation, so at the end of the day the bug
affects the latest Oak and latest AEM as well.)
We have noticed this issue via log analysis. When we publish the same asset to
all of our publisher instances, we are seeing a recurring IOException in the
log. The author instance eventually retries the publish operation and by that
time, there is no race condition and the operation succeeds, but the situation
is still not ideal.
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