Alex Parvulescu created OAK-1959:
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Summary: AsyncIndexUpdate unable to cope with missing checkpoint
ref
Key: OAK-1959
URL: https://issues.apache.org/jira/browse/OAK-1959
Project: Jackrabbit Oak
Issue Type: Bug
Components: core
Affects Versions: 1.0.1, 1.0
Reporter: Alex Parvulescu
Assignee: Alex Parvulescu
The async index uses a checkpoint reference stored under the _:async_ hidden
node as a base for running the index diff.
It might happen that this reference is stale (pointing to checkpoints that no
longer exist) so the async indexer logs a warning that it will reindex
everything and will start its work.
The trouble is with the #mergeWithConcurrencyCheck which does not cope well
with this scenario. Even if the ref checkpoint is null, it will throw a
concurrent update exception which will be logged as a misleading debug log
_Concurrent update detected in the async index update_.
Overall the code looks stuck in an endless reindexing loop.
{code}
*WARN* [pool-9-thread-1]
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate Failed to retrieve
previously indexed checkpoint 569d8847-ebb6-4832-a55f-2b0b1a32ae71; re-running
the initial async index update
*DEBUG* [pool-9-thread-1]
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate Concurrent update
detected in the async index update
{code}
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