EntityManager is sometimes null due to upgrade from 12.1.3.0 to 12.2.1.3
After upgrading our weblogic server from version 12.1.3.0 to 12.2.1.3, there are cases where the EntityManager is null whereas it shouldn't.
We get the following error :
####<Sep 25, 2018 4:33:43,247 PM CEST> <Debug> <ClassLoadingVerbose> <smc-mlp-ansible> <mlp-MS01> <[ACTIVE] ExecuteThread: '18' for queue: 'weblogic.kernel.Default (self-tuning)'> <AdN-appl-submit> <> <96917204-0b37-4bc8-9422-6a6558c79778-00000105> <1537886023247> <[severity-value: 128] [rid: 0] [partition-id: 0] [partition-name: DOMAIN] > <BEA-000000> <<Sep 25, 2018 04:33:43.247 PM CEST> GCL[2d8f3ad3][smc-mlp-application#1.9.1.0@] GCL.loadClass(javax.persistence.EntityManager)>
####<Sep 25, 2018 4:33:43,247 PM CEST> <Debug> <ClassLoadingVerbose> <smc-mlp-ansible> <mlp-MS01> <[ACTIVE] ExecuteThread: '18' for queue: 'weblogic.kernel.Default (self-tuning)'> <AdN-appl-submit> <> <96917204-0b37-4bc8-9422-6a6558c79778-00000105> <1537886023247> <[severity-value: 128] [rid: 0] [partition-id: 0] [partition-name: DOMAIN] > <BEA-000000> <<Sep 25, 2018 04:33:43.247 PM CEST> GCL[2d8f3ad3][smc-mlp-application#1.9.1.0@] GCL.loadClass(javax.persistence.EntityManager)>