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https://issues.apache.org/jira/browse/SOLR-2233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044460#comment-13044460
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Fuad Efendi commented on SOLR-2233:
-----------------------------------
Note that with this implementation "connection" is closed only when main
instance of main class finalized => connection never closed; so that the code
is still naive (server can close connection - how will we know that?) -
fortunately it doesn't happen in my specific case already few months of night
imports...
We should use connection pooling - this would be next improvement; conn.close()
in this case will return connection to pool (without closing it), and pool is
responsible for testing connections for liveness.
> DataImportHandler - JdbcDataSource is not thread safe
> -----------------------------------------------------
>
> Key: SOLR-2233
> URL: https://issues.apache.org/jira/browse/SOLR-2233
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler
> Affects Versions: 1.5
> Reporter: Fuad Efendi
> Attachments: FE-patch.txt, SOLR-2233-JdbcDataSource.patch,
> SOLR-2233-JdbcDataSource.patch, SOLR-2233.patch, SOLR-2233.patch
>
>
> Whenever Thread A spends more than 10 seconds on a Connection (by retrieving
> records in a batch), Thread B will close connection.
> Related exceptions happen when we use "threads=" attribute for entity;
> usually exception stack contains message "connection already closed"
> It shouldn't happen with some JNDI data source, where Connection.close()
> simply returns Connection to a pool of available connections, but we might
> get different errors.
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