"ARJUNA012141: Multiple last resources have been added to the current transaction. This is transactionally unsafe ..." in JBoss EAP

Solution Verified - Updated

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7
    • 6

Issue

  • The following WARN is observed in the server.log:

      WARN ... ARJUNA012141: Multiple last resources have been added to the current transaction. This is transactionally unsafe and should not be relied upon. Current resource is <resource>

    Or

      WARN  [com.arjuna.ats.arjuna] ARJUNA012142: You have chosen to enable multiple last resources in the transaction manager. This is transactionally unsafe and should not be relied upon.

Resolution

Remove the allowMultipleLastResources override and apply one of the recommended solutions to avoid unsafe transactional scenarios.

Root Cause

This warning indicates that the property allowMultipleLastResources has been configured to override the built-in safeguard JBoss provides against unsafe transactional usage. This override should be avoided in production systems due to the vulnerability it introduces. With the override in place, applications are vulnerable to inconsistent commit which may result in corruption of data in the backing datasources.

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