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https://issues.apache.org/jira/browse/SOLR-4473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15998702#comment-15998702
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Alexandre Rafalovitch commented on SOLR-4473:
---------------------------------------------
Good catch.
I'll check next week if this went away on its own in the last 3 years. If it
hasn't, then I'll need to think whether it is important to keep around.
> Reloading a core will not close (leak) associated DIH JDBC connection
> ---------------------------------------------------------------------
>
> Key: SOLR-4473
> URL: https://issues.apache.org/jira/browse/SOLR-4473
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler
> Affects Versions: 4.1
> Reporter: Alexandre Rafalovitch
> Assignee: Alexandre Rafalovitch
> Fix For: 4.9, 6.0
>
>
> I have DIH configured with Derby database. After I start Solr, I can run DIH
> import fine. After I reload the core, DIH can no longer run with the
> following message (excerpts):
> ...
> EVERE: Exception while processing: vac document :
> SolrInputDocument[]:org.apache.solr.handler.dataimport.DataImportHandlerException:
> Unable to execute query: select * from ALERTS Processing Document # 1
> at
> org.apache.solr.handler.dataimport.DataImportHandlerException.wrapAndThrow(DataImportHandlerException.java:71)
> at
> org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:253)
> at
> org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:210)
> at
> org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:38)
> at
> org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
> at
> org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
> at
> org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:243)
> at
> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:465)
> Caused by: java.sql.SQLException: Another instance of Derby may have already
> booted the database <PATH>.
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