Posted on 2007-03-06 12:49
rednight 阅读(226)
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Some XA JDBC drivers do not support local transaction operations, which can cause an error similar to the following when optimistic concurrency is used with such a driver:
SQL operations are not allowed with no global transaction by default for XA drivers.
In other words, the error will occur when
SupportsLocalTransactions="true"
is specified for the JDBCConnectionPool.
This problem occurs because optimistic concurrency suspends a global transaction and does reads in a local transaction when the database is not Oracle. (When using Oracle, you can avoid this problem by explicitly setting
<database-type>Oracle</database-type>
in your CMP deployment descriptor.)
Workaround
: Use the "RollbackLocalTxUponConnClose" on the JDBCConnection.