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  • Connection-Pool, TransactionManager and Dirty Read

    Hello,

    I want to load millions of data in 3 tables. One Thread makes a select as an consumer and a pool of Threads get this data, look a the tables and make an inserts or update. (Informix Database)

    For inserts and updates I use the SimpleJdbcTemplate. The isolation level is uncommited read, because I want to use transactions and all threads need the uncommited records.

    But it doesn't work with transaction.
    First I use the dbcp-connection pool, but it doesn't work togehter with autocommit=false and dirty read.
    The SingleConnectionDataSource locks the table.

    Can everybody give me an hint to solve this problem?
    Wich DataSource should I use?

    Thanks a lot.
    Ranger

  • #2
    I have fixed the problem.

    I use now c3po as connection pool (c3po.DriverManagerDataSource), with autoCommit=false and isolation level read uncommited.

    The problem was the foreign key. It is not possible to insert a new record with a forgein key which refer to an uncommited record in an other table.

    Sleeping over a problem is sometimes a good idea.

    Ranger

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