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https://issues.apache.org/jira/browse/SOLR-17805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruno Roustant resolved SOLR-17805.
-----------------------------------
Fix Version/s: 9.9
Resolution: Fixed
> Transaction log constructor can fail and leave a file that blocks the update
> log.
> ---------------------------------------------------------------------------------
>
> Key: SOLR-17805
> URL: https://issues.apache.org/jira/browse/SOLR-17805
> Project: Solr
> Issue Type: Bug
> Affects Versions: 9.8.1
> Reporter: Bruno Roustant
> Priority: Major
> Labels: pull-request-available
> Fix For: 9.9
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> TransactionLog constructor can either open an existing log, or create a new
> log. When it is required to create a new log, it first creates a new empty
> log file and then opens an output stream on it.
> After the new empty log file is created, if an exception occurs when creating
> the output stream (e.g. disk full, encryption key not available), the
> TransactionLog object is not created, but the empty file is left. The problem
> is that UpdateLog does not update its "id" field which should point to the
> next (non-existing) transaction log id, instead it continues to point to the
> empty log file. This completely blocks the logic in UpdateLog.ensureLog() and
> TransactionLog constructor will always refuse to create a new transaction
> log, throwing "New transaction log already exists" for each update,
> effectively blocking all subsequent updates, until the Solr server is
> restarted.
> The proposed fix is to
> 1- Delete the created empty log file is an exception is thrown inside the
> TransactionLog constructor.
> 2- Fix the error code inconsistency between DirectUpdateHandler2.addDoc()
> (which currently sets a 4xx code) and
> RequestHandlerBase.normalizeReceivedException() (which currently asserts a
> 5xx code).
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