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https://issues.apache.org/jira/browse/SOLR-15635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17436156#comment-17436156
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Mikhail Khludnev commented on SOLR-15635:
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Hi, [~mdrob].
Thanks for providing your consideration. I share this concern too.
bq. log a warning if we attempt to double close.
Literally, it means we need to add counter in {{CloseHook}} really?
bq. in /export and we should fix that
Well. It was my first thought too. However, {{/export}} is just guilty in using
{{MDCAwareThreadPool}}, you know like many other components. All of them hit
{{SRI.clear()}} once [here
SRI.getInheritableThreadLocalProvider.clean()|https://github.com/apache/solr/blob/06be1acfee6c29cdbb4e21e2f1a0c6d82aa8f660/solr/core/src/java/org/apache/solr/request/SolrRequestInfo.java#L235]
and [here
HttpSolrCall.destroy()|https://github.com/apache/solr/blob/06be1acfee6c29cdbb4e21e2f1a0c6d82aa8f660/solr/core/src/java/org/apache/solr/servlet/HttpSolrCall.java#L676].
The worst case would be, if {{HttpSolrCall.mustClearSolrRequestInfo}} already
works around some edge cases there.
> clearing SolrRequestInfo.clearRequestInfo() twice repeats close() on the hook
> -----------------------------------------------------------------------------
>
> Key: SOLR-15635
> URL: https://issues.apache.org/jira/browse/SOLR-15635
> Project: Solr
> Issue Type: Bug
> Components: Export Writer, query parsers
> Affects Versions: 8.9
> Environment: * 2x solr nodes (12cpu, 40Gb, 300gb hdd)
> * solr heap: 30Gb
> * index size: ~60Gb per node
> * docs count: ~1M
>
> Reporter: Roman Voronin
> Assignee: Mikhail Khludnev
> Priority: Major
> Attachments: SOLR-15635.patch, SOLR-15635.patch, err1.log, err2.log
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Hello,
> When I executing an export query, sometimes I get the error:
> {code:java}
> [c:text s:shard1 r:core_node3 x:text_shard1_replica_n1] o.a.s.c.SolrCore
> java.lang.IllegalArgumentException: Unknown directory:
> NRTCachingDirectory(MMapDirectory@/var/solrhome/workset_9ce130e7-eee0-4d7b-be71-e22d54c55f81_shard1_replica_n1/data/snapshot_metadata
> lockFactory=org.apache.lucene.store.NativeFSLockFactory@21d64083;
> maxCacheMB=48.0 maxMergeSizeMB=4.0) {}[c:text s:shard1 r:core_node3
> x:text_shard1_replica_n1] o.a.s.c.SolrCore
> java.lang.IllegalArgumentException: Unknown directory:
> NRTCachingDirectory(MMapDirectory@/var/solrhome/workset_9ce130e7-eee0-4d7b-be71-e22d54c55f81_shard1_replica_n1/data/snapshot_metadata
> lockFactory=org.apache.lucene.store.NativeFSLockFactory@21d64083;
> maxCacheMB=48.0 maxMergeSizeMB=4.0) {} at
> org.apache.solr.core.CachingDirectoryFactory.release(CachingDirectoryFactory.java:441)
> at org.apache.solr.core.SolrCore.close(SolrCore.java:1684) at
> org.apache.solr.search.JoinQParserPlugin$Method.parseJoin(JoinQParserPlugin.java:191)
> at
> org.apache.solr.search.JoinQParserPlugin$Method$1.makeFilter(JoinQParserPlugin.java:98)
> at
> org.apache.solr.search.JoinQParserPlugin$1.parse(JoinQParserPlugin.java:237)
> at org.apache.solr.search.QParser.getQuery(QParser.java:174) at
> org.apache.solr.parser.SolrQueryParserBase.getFieldQuery(SolrQueryParserBase.java:1080)
> at
> org.apache.solr.parser.SolrQueryParserBase.getFieldQuery(SolrQueryParserBase.java:551)
> at
> org.apache.solr.parser.SolrQueryParserBase.handleQuotedTerm(SolrQueryParserBase.java:8
> {code}
> After that, working with the "Unknown" collection is impossible until solr
> restarts. A few words about my queries - all of them consist of "fq" with
> \{!join from=...} and "q" of different complexity. In my experience, the
> complexity of "q" doesn't affect this error.
> The exception happens only when using export, with /select handler same query
> works well. Seems using export + query with join sometimes causes a bug.
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