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https://issues.apache.org/jira/browse/SOLR-8449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Thacker updated SOLR-8449:
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Attachment: SOLR-8449.patch
Patch which fixes the problem.
Previously we never supported restoring the same backup . Hence this bug was
found.
I've tried it manually and it works with the steps listed out here. Still need
to write some tests before committing this
> Restore functionality not working
> ---------------------------------
>
> Key: SOLR-8449
> URL: https://issues.apache.org/jira/browse/SOLR-8449
> Project: Solr
> Issue Type: Bug
> Components: replication (java), replication (scripts)
> Affects Versions: 5.2.1, 5.4
> Environment: SUSE Linux Enterprise Server 11 (64 bit) and Windows 7
> Prof SP1
> Reporter: Johannes Brucher
> Priority: Critical
> Attachments: SOLR-8449.patch, log_windows7_sp1.txt
>
>
> Hi all, I facing the following issue with Solr 5.2.1 and the ongoing version
> 5.4.
> The restore functionality is not working under Linux and causing an exception
> on Windows machines each time you want to restore an existing backup twice or
> even more.
> Steps to reproduce:
> 1. Start a Solr instance pointing the solr_home to e.g. the example-DIH
> folder.
> 2. Select a core, e.g. the “solr” core.
> 3. Switch to the “Documents” tab
> 4. Add a document {“id”:”1”,”title”:”change.me”}
> 5. Do a backup with the following API call
> “/solr/replication?command=backup&name=test”
> The backup defaults to the location solr_home/solr/data/snapshot.test
> 6. Add a document to the index {“id”:”2”,”title”:”change.me”}. Now there a
> two document in the index.
> 7. Restore the back with the following call
> “/solr/replication?command=restore&name=test”
> New index location “solr_home/solr/data/restore.snapshot.test” is created
> without any physical file in it, except the file write.lock. Num Docs is now
> 1 as expected!
> 8. Add a document to the index {“id”:”3”,”title”:”change.me”}. Now there a
> two document in the index.
> 9. Restore the same previous created back again with the following call
> “/solr/replication?command=restore&name=test”. Notice, there are still 2 docs
> in the index!!!
> 10. Try to restore again, but still the same, 2 docs in the index…
> 11. Shut down Solr, you will see the index folder
> “solr_home/solr/data/restore.snapshot.test” disappears.
> 12. Restart Solr. You will notice the following log entry “Solr index
> directory ‘solr_home/solr/data/restore.snapshot.test’ doesn’t exist. Creating
> new index”, and indeed the Index is empty, showing 0 documents.
> 13. After the restart, I tried to restore the existing backup again without
> any results…
> I thing this behavior in not intended!!!
> Even more Problems arise when you run Solr on a Windows machine.
> After step 10 a folder “index” is created under “solr_home/solr/data/” with a
> write.lock file in it. After that, the following exception is thrown:
> …Error closing IndexWriter
> java.lang.IllegalStateException: file:
> MMapDirectory@D:\solr\Solr_versions\solr-5.2.1\...restore.snapshot.test
> lockFactory=org.apache.lucene.store.Nat
> iveFSLockFactory@3d3d7a0e appears both in delegate and in cache
> The log file from the Windows test is attached.
> Let me know if you have problems reproducing the same behavior,
> Regards Johannes
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