Cause
Using lexer type KOREAN_LEXER which is desupported.
Using lexer type KOREAN_LEXER which is desupported.
Use lexer type KOREAN_MORPH_LEXER instead.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/drgus.htm
https://community.oracle.com/message/3286145
https://community.oracle.com/message/3865145
https://community.oracle.com/message/10222781
https://community.oracle.com/message/4364504
https://community.oracle.com/message/1969031
https://community.oracle.com/message/10062554
https://community.oracle.com/message/3358230
https://community.oracle.com/message/2686615
https://community.oracle.com/message/9526615
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