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https://issues.apache.org/jira/browse/JENA-1927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17145774#comment-17145774
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Rob Vesse commented on JENA-1927:
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Note that this is an error message from a low level sub-system. At the point
the error occurs it has absolutely no idea the context in which it was called
so it can't blindly add any verbiage about how to resolve the error because it
depends on how the low level sub-system is being used.
That being said the website could have more information about this, added to
FAQs with PR https://github.com/apache/jena-site/pull/13
> First time usage confusing message Unable to check TDB lock owner, the lock
> file contents appear to be for a TDB2 database. Please try loading this
> location as a TDB2 database.
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: JENA-1927
> URL: https://issues.apache.org/jira/browse/JENA-1927
> Project: Apache Jena
> Issue Type: Task
> Affects Versions: Jena 3.14.0
> Reporter: Wolfgang Fahl
> Priority: Minor
>
> I found an explanation for starting fuseki server and tried it with:
> java -jar fuseki-server.jar --loc=../data /somename
> and got the message:
> caught: Unable to check TDB lock owner, the lock file contents appear to be
> for a TDB2 database. Please try loading this location as a TDB2 database
> when searching the internet i only found a pull request with "improving the
> message".
> After some more searching i found:
> [https://jena.apache.org/documentation/tdb2/tdb2_fuseki.html]
> which seems to ask for {{--tdb2}} flag - i'd suggest the message should
> include this information "Please try loading this location as a TDB2 database
> e.g. by providing the --tdb2 flag or following the instructions at ...
>
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