Charit Saini  There is not enough contextual information to identify the problem. The location of the NPE indicates that `loggerContext` for the `logger` instance is not set which seems, at least at first glance, impossible. This suggests to be that something quite peculiar is going on which is likely to be related to your specific environment.

Please provide a test case reproducing the problem.  Alternatively, please contact support_at_qos.ch by email for support offerings.