-939 ROLLBACK REQUIRED DUE TO UNREQUESTED ROLLBACK OF A REMOTE SERVER

Explanation
 A dynamic commit was executed preceding the execution
of this request. The remote server to which the application was CONNECTed
during the dynamic COMMIT successfully committed.  However, at least
one other remote server (which was read-only) rolled back its portion
of the distributed unit of work during the dynamic commit.
 To
ensure that an application that uses cursor-hold cursors does not
incorrectly assume cursor position is being maintained at any remote
server that rolled back, the application must perform a rollback operation.
 Communications
are still established with all remote servers.

System action
 In the IMS™ and CICS® environments, all SQL statements
are rejected until the rollback occurs. In the other environments,
all SQL statements other than a static ROLLBACK are rejected until
a static ROLLBACK is executed.

Programmer response
 Issue the appropriate (depending on the
environment) request to cause a rollback.  Re-establish any cursor
positioning and continue the application with the first request that
received the -939 SQLCODE.
 SQLERRP contains the name of the
module that detected the previous failure and placed the application
in the must-abort state.

SQLSTATE
 51021 