[jbosscache-issues] [JBoss JIRA] Commented: (JBCACHE-1410) JDBCCacheLoader may attempt to create a node entry in the DB twice

[Tomas Frastia (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBCACHE-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12519564#action_12519564 ] 

Tomas Frastia commented on JBCACHE-1410:
----------------------------------------

Hi

I have the same problem and I think I managed to get it fixed. The problem was in class org.jboss.cache.loader.AdjListJDBCCacheLoader in method populatePreparedStatementForInsert(). A wrong SQL insert query is used when saving a business-object. If the business-object is larger than 4000 bytes then the SQL insert query fails and returns an error code ORA-01461.


My fix:
I changed the SQL insert query by replacing the second parameter from '?' to 'empty_blob()' and after a successfull insert into the DB I have selected the inesrted row and put it into blob data via java.sql.ResultSet.

 
I uploaded corrected class and simple to http://community.jboss.org/message/531561#531561


Tomas,

> JDBCCacheLoader may attempt to create a node entry in the DB twice
> ------------------------------------------------------------------
>
>                 Key: JBCACHE-1410
>                 URL: https://jira.jboss.org/jira/browse/JBCACHE-1410
>             Project: JBoss Cache
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Cache loaders
>    Affects Versions: 2.0.0.GA, 2.1.0.GA, 2.1.1.GA, 2.2.0.GA
>            Reporter: Manik Surtani
>            Assignee: Mircea Markus
>             Fix For: 3.3.0.GA
>
>
> This is due to inadequate synchronization in the addNewSubtree() method in the JDBCCacheLoader.

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