[SOLVED] JDeveloper 12.2.1.2.0 – long designer initialization/exceptions

Workaround for some exceptions during JDeveloper 12c launch process and designer initialization.

Problem
There are several symptoms which are caused by the described problem. Some of them are listed below:

 

Cause
The cause of the problem is incompatible JDK version. It was a bug in some versions of Java. The problem doesn’t occur in the newest JDK8 version.

 

Solution

Use jdk-8u101 instead of you currrent JDK version.Edit ~/.jdeveloper/12.2.1.2.0/product.conf file and change java home path to jdk-8u101.

Exceptions

 

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