JIRA: [NEMO-214: Use Jackson for building JSON, fix malformed JSON issue on Windows](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-214)
**Major changes:** - Use Jackson for builidng string representation of DAG. - Use Jackson for building string representation of ExecutionPropertyMap. **Minor changes to note:** - HashRange, StateMachine, TaskState, BlockState, PlanState, and StageState: Eliminate unnecessary usage of StringBuffer and StringBuilder. **Tests for the changes:** - N/A **Other comments:** - This fixes 'malformed JSON' issue on Windows environments. Closes #GITHUB_PR_NUMBER [ Full content available at: https://github.com/apache/incubator-nemo/pull/118 ] This message was relayed via gitbox.apache.org for [email protected]
