[Maven Build Error] cannot access kr.bydelta.koala.proc.CanSplitSentence, MojoFailureException

1. 환경

- Windows 10 Pro 64bit

- java : open jdk 1.8.0.252-2.b09 64bit

- spring boot v2.2.2.Release

- eclipse v2020-12 (4.18.0)

- 내장톰캣 9.0.29

- maven compiler 3.8.1

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2. 오류메시지

- Goal 에 package 입력 후 Maven Build.. 시 오류 발생

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /C:/Project/workspace/aicrawlingcheduler/src/main/java/com/enliple/ai/schedule/docCut/DocumentCut.java:[33,47] cannot access kr.bydelta.koala.proc.CanSplitSentence
  class file for kr.bydelta.koala.proc.CanSplitSentence not found
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  13.750 s
[INFO] Finished at: 2021-03-24T12:33:47+09:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project AICrawlingScheduler: Compilation failure
[ERROR] /C:/Project/workspace/aicrawlingcheduler/src/main/java/com/enliple/ai/schedule/docCut/DocumentCut.java:[33,47] cannot access kr.bydelta.koala.proc.CanSplitSentence
[ERROR]   class file for kr.bydelta.koala.proc.CanSplitSentence not found
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

3. 해결방안

- Project > clean

- Run As > Maven clean

- Run As > Maven install => 필요 라이브러리 다운로드 받기 시작

- Run As > Maven Build.. > Goal : package => 성공함