症状

Generation of a Clover report fails with a message like:

[clover-report] Processed 0 recording files in 12ms (- per recording)
[clover-report] Processed 0 per-test recording files in 0ms (- per recording)
[clover-report] No coverage recordings found. No report will be generated.

In case coverage recording files are present next to the Clover database:

• see Ignoring coverage recording files

In case when there are no coverage recording files:

• Clover could not initialize due to missing clover.jar on a class path - see NoClassDefFoundError com_atlassian_clover/CoverageRecorder
• Clover could not initialize due to missing clover.db database - see Using Clover in various environment configurations

参考

• Managing the Coverage Database
• https://answers.atlassian.com/questions/304965/clover-html-report-no-coverage-recordings-found-no-report-will-be-generated
• https://answers.atlassian.com/questions/304331/warn-no-coverage-recordings-found-no-report-will-be-generated