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https://issues.apache.org/jira/browse/SOLR-9120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hoss Man resolved SOLR-9120.
----------------------------
Resolution: Fixed
Fix Version/s: master (8.0)
7.2
> LukeRequestHandler logs WARN "Error getting file length for [segments_NNN]"
> for inconsequential NoSuchFileException situations -- looks scary but is not
> a problem, logging should be reduced
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-9120
> URL: https://issues.apache.org/jira/browse/SOLR-9120
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 5.5, 6.0
> Reporter: Markus Jelsma
> Assignee: Hoss Man
> Fix For: 7.2, master (8.0)
>
> Attachments: SOLR-9120.patch, SOLR-9120.patch, SOLR-9120.patch
>
>
> Begining with Solr 5.5, the LukeRequestHandler started attempting to report
> the name and file size of the segments file for the _current_
> Searcher+IndexReader in use by Solr -- however the filesize information is
> not always available from the Directory in cases where "on disk" commits have
> caused that file to be removed, for example...
> * you perform index updates & commits w/o "newSearcher" being opened
> * you "concurrently" make requests to the LukeRequestHandler or the
> CoreAdminHandler requesting "STATUS" (ie: after the commit, before any
> newSearcher)
> ** these requests can come from the Admin UI passively if it's open in a
> browser
> In situations like this, a decision was made in SOLR-8587 to log a WARNing in
> the event that the segments file size could not be determined -- but these
> WARNing messages look scary and have lead (many) users to assume something is
> wrong with their solr index.
> We should reduce the severity of these log messages, and improve the wording
> to make it more clear that this is not a fundemental problem with the index.
> ----
> Here's some trivial steps to reproduce the WARN message...
> {noformat}
> $ bin/solr -e techproducts
> ...
> $ tail -f example/techproducts/logs/solr.log
> ...
> {noformat}
> In another terminal...
> {noformat}
> $ curl -H 'Content-Type: application/json'
> 'http://localhost:8983/solr/techproducts/update?commit=true&openSearcher=false'
> --data-binary '[{"id":"HOSS"}]'
> ...
> $ curl 'http://localhost:8983/solr/techproducts/admin/luke'
> ...
> {noformat}
> When the "/admin/luke" URL is hit, this will show up in the logs – but the
> luke request will finish correctly...
> {noformat}
> WARN - 2017-11-08 17:23:44.574; [ x:techproducts]
> org.apache.solr.handler.admin.LukeRequestHandler; Error getting file length
> for [segments_2]
> java.nio.file.NoSuchFileException:
> /home/hossman/lucene/dev/solr/example/techproducts/solr/techproducts/data/index/segments_2
> at
> sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
> at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
> at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
> at
> sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
> at
> sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:144)
> at
> sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99)
> at java.nio.file.Files.readAttributes(Files.java:1737)
> at java.nio.file.Files.size(Files.java:2332)
> at org.apache.lucene.store.FSDirectory.fileLength(FSDirectory.java:243)
> at
> org.apache.lucene.store.NRTCachingDirectory.fileLength(NRTCachingDirectory.java:128)
> at
> org.apache.solr.handler.admin.LukeRequestHandler.getFileLength(LukeRequestHandler.java:611)
> at
> org.apache.solr.handler.admin.LukeRequestHandler.getIndexInfo(LukeRequestHandler.java:584)
> at
> org.apache.solr.handler.admin.LukeRequestHandler.handleRequestBody(LukeRequestHandler.java:136)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:177)
> ...
> INFO - 2017-11-08 17:23:44.587; [ x:techproducts]
> org.apache.solr.core.SolrCore; [techproducts] webapp=/solr path=/admin/luke
> params={} status=0 QTime=15
> {noformat}
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