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https://issues.apache.org/jira/browse/SOLR-10777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030660#comment-16030660
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Hrishikesh Gadre commented on SOLR-10777:
-----------------------------------------
Actually SOLR-9536 is fixed in 6.3 release. So it is quite possible that you
are hitting it in 6.2.1. But I am a bit surprised to see that happening in
6.5.1 as well.
> Replication Backup creation fails with NPE, while deleting the old backups
> --------------------------------------------------------------------------
>
> Key: SOLR-10777
> URL: https://issues.apache.org/jira/browse/SOLR-10777
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Backup/Restore, replication (java)
> Affects Versions: 6.2.1, 6.5.1
> Reporter: Nilesh Singh
> Priority: Minor
> Attachments: Screen Shot 2017-05-30 at 7.53.50 PM.png, Screen Shot
> 2017-05-30 at 7.54.18 PM.png, SOLR-10777.patch
>
> Original Estimate: 20m
> Remaining Estimate: 20m
>
> in Solr back up SnapShooter will try to delete the old backups saved on the
> disk automatically, but deletion fails as the files may not be the pattern
> type expected by the OldBackUpDirectory.
> ```
> private static final Pattern dirNamePattern =
> Pattern.compile("^snapshot[.](.*)$");
> ```
> In this case the following code throws NPE.
> ```
> if (obd.getTimestamp().isPresent()) {
> dirs.add(obd);
> }
> ```
> also in OldBackUpDirectory`s pattern match should haver matcher.matches(), to
> fetch the group(1) value.
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