Application Returns "IllegalArgumentException: Object: null is not a known Entity type" After 70 Minutes on Submit (Doc ID 2636648.1)

Last updated on OCTOBER 27, 2022

Applies to:

Symptoms

Application in 12.2.1.3.0 with DB connection throws InvocationTargetException caused by "java.lang.IllegalArgumentException: Object: null is not a known Entity type." after 70 minutes working with it and then a submit is performed.

Error stack trace:

java.lang.reflect.InvocationTargetException
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
...
Caused by: javax.ejb.EJBException: EJB Exception: : java.lang.IllegalArgumentException: Object: null is not a known Entity type.
 at org.eclipse.persistence.internal.jpa.EntityManagerImpl.mergeInternal(EntityManagerImpl.java:548)
 at org.eclipse.persistence.internal.jpa.EntityManagerImpl.merge(EntityManagerImpl.java:530)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...
Caused by: java.lang.IllegalArgumentException: Object: null is not a known Entity type.
 at org.eclipse.persistence.internal.jpa.EntityManagerImpl.mergeInternal(EntityManagerImpl.java:548)
 at org.eclipse.persistence.internal.jpa.EntityManagerImpl.merge(EntityManagerImpl.java:530)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...

Similar application works fine in 12.1.3.0.0.

Cause

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