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From "Frank Wesemann (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-2233) DataImportHandler - JdbcDataSource is not thread safe
Date Tue, 31 May 2011 22:13:48 GMT

     [ https://issues.apache.org/jira/browse/SOLR-2233?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Frank Wesemann updated SOLR-2233:
---------------------------------

    Attachment: SOLR-2233.patch

For a less obtrusive solution I came up with the attached patch.

People with more knowledge may do something useful in the {{isConnectionValid()}} method.

As I had to learn postgresql Driver for jdbc4 does not implement {{isValid(timeout)}}.

May be one can trick the connectionpool to validate the connection after a certain amount
of time.

> 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
>
>
> 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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