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https://issues.apache.org/jira/browse/SOLR-6737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15013953#comment-15013953
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Mark Miller commented on SOLR-6737:
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bq. the filesystem is HDFS I'm not sure....
HDFS has more of an issue only because there are no native locks - so no auto
cleanup on crash or whatever. But unlockOnStartup is a really, really, really
bad idea to use on a shared filesystem especially.
Otherwise, there is nothing different about it really.
> Remove unlockOnStartup option
> -----------------------------
>
> Key: SOLR-6737
> URL: https://issues.apache.org/jira/browse/SOLR-6737
> Project: Solr
> Issue Type: Bug
> Reporter: Michael McCandless
>
> In LUCENE-6060 we removed IndexWriter.unlock: the method is dangerous, and we
> needed because of buggy locking implementations which we think are now fixed
> ... but I left Solr's unlockOnStartup option in that issue (wasn't sure what
> to do). I think Solr should also remove it?
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