Cannot insert a blob in Audit using Tomcat / Postgresql

When trying to display an array of String in Audit's history tab using ExtensionInfo, the value is recognized as a
BlobInfo.
When trying to persist it in PostgreSQL, an exception is throwing saying the autocommit is true, and not permit.
The reason is a strange tomcat's behavior that set it to true sometimes althought if it is inside a transaction.

It must be fixed if tomcat datasources are defined as XA, because it explicitly set autocommit to false.