# ClassCastException while parsing SimpleCov JSON **URL:** \ **Category:** SonarQube Server / Community Build\ **Tags:** ruby, sonarqube\ **Created:** [January 24, 2019, 11:08am UTC](https://community.sonarsource.com/t/classcastexception-while-parsing-simplecov-json/6117 "2019-01-24T11:08:48Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Tharnilich](https://avatars.discourse-cdn.com/v4/letter/t/cab0a1/32.png) [@Tharnilich](https://community.sonarsource.com/u/Tharnilich)\ **Post date:** [January 24, 2019, 11:08am UTC](https://community.sonarsource.com/t/classcastexception-while-parsing-simplecov-json/6117/1 "2019-01-24T11:08:48Z")
I want to let Sonarqube to show coverage produced by SimpleCov (Ruby). So I installed SimpleCov and SimpleCov-JSON formatter for this, updated config like described by [doc](https://docs.sonarqube.org/display/PLUG/Ruby+Coverage+Results+Import). JSON-Report will be produced (see JSON section). But I get an exception (see below). What is wrong with JSON or my configuration? # Exception ```auto |24-Jan-2019 09:06:55 |INFO: Sensor SimpleCov Sensor for Ruby coverage [ruby]| |---|---| |24-Jan-2019 09:06:55 |ERROR: Cannot read coverage report file, expecting standard SimpleCov resultset JSON format: './test-build/coverage.json'| |24-Jan-2019 09:06:55 |java.lang.ClassCastException: java.lang.String cannot be cast to org.sonarsource.analyzer.commons.internal.json.simple.JSONObject| |24-Jan-2019 09:06:55 | at org.sonarsource.ruby.plugin.SimpleCovSensor.mergeFileCoverages(SimpleCovSensor.java:112)| |24-Jan-2019 09:06:55 | at org.sonarsource.ruby.plugin.SimpleCovSensor.execute(SimpleCovSensor.java:71)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.sensor.SensorWrapper.analyse(SensorWrapper.java:45)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.phases.SensorsExecutor.execute(SensorsExecutor.java:88)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.phases.SensorsExecutor.execute(SensorsExecutor.java:62)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:74)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:164)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:319)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:314)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:288)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:48)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:82)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)| |24-Jan-2019 09:06:55 | at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)| |24-Jan-2019 09:06:55 | at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:131)| |24-Jan-2019 09:06:55 | at org.sonar.batch.bootstrapper.Batch.doExecuteTask(Batch.java:116)| |24-Jan-2019 09:06:55 | at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:111)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:63)| |24-Jan-2019 09:06:55 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)| |24-Jan-2019 09:06:55 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)| |24-Jan-2019 09:06:55 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)| |24-Jan-2019 09:06:55 | at java.lang.reflect.Method.invoke(Method.java:497)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)| |24-Jan-2019 09:06:55 | at com.sun.proxy.$Proxy0.execute(Unknown Source)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:233)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis(EmbeddedScanner.java:151)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.cli.Main.runAnalysis(Main.java:123)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.cli.Main.execute(Main.java:77)| |24-Jan-2019 09:06:55 | at org.sonarsource.scanner.cli.Main.main(Main.java:61)| ``` # JSON ```auto { "timestamp": 1548317201, "command_name": "RSpec", "files": [{ "filename": "path/lib/mytool/command.rb", "covered_percent": 43.24324324324324, "coverage": [null, null, null, null, null, null, null, null, 1, null, 1, 1, 1, null, 1, null, null, null, null, 1, 0, null, null, null, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null, null, null, null, null, 1, 0, 0, null, null, null], "covered_strength": 0.4, "covered_lines": 16, "lines_of_code": 37 }, { "filename": "path/lib/mytool/commands/changelog.rb", "covered_percent": 96.0, "coverage": [null, null, null, null, null, null, null, null, 1, 1, 1, 1, 1, 1, 1, null, 1, 1, null, null, 1, 1, 1, 1, 1, 1, 1, 1, null, 1, 2, null, 2, null, null, 2, 2, null, null, 1, 2, 2, 2, 2, null, null, 1, null, null, 1, 2, 2, 2, null, 2, null, 2, 2, 0, 0, null, 2, null, null, null, null, 1, 2, 2, null, null, null, 1, 2, 2, null, null, null, 1, 2, null, 2, 2, null, null, 1, null, 1, null, null, null], "covered_strength": 1.4, "covered_lines": 48, "lines_of_code": 50 }, { "filename": "path/lib/mytool/commands/copyright.rb", "covered_percent": 54.83870967741935, "coverage": [null, null, null, null, null, null, null, null, 1, 1, 1, 1, 1, 1, null, 1, 1, null, 1, null, null, 1, 0, null, null, null, null, null, 1, 0, null, 0, null, 0, 0, null, null, 1, null, null, null, null, 1, 0, null, null, null, null, 1, 0, 0, null, null, null, null, null, 1, 0, null, 0, 0, null, 0, null, null, null, null, null, null, 1, 0, null, null, null, null, null, null, 1, 0, null, null, null, null], "covered_strength": 0.5, "covered_lines": 17, "lines_of_code": 31 }, { "filename": "path/lib/mytool/commands/release.rb", "covered_percent": 63.1578947368421, "coverage": [null, null, null, null, null, null, null, null, 1, 1, 1, 1, null, 1, 1, null, 1, 1, null, 1, 0, null, 0, null, null, 1, 0, 0, 0, 0, null, 0, null, null, 1, null, 1, null, null, null], "covered_strength": 0.6, "covered_lines": 12, "lines_of_code": 19 }, ... { "filename": "path/lib/mytool/common/ui.rb", "covered_percent": 100.0, "coverage": [null, null, null, null, null, null, null, null, 1, null, 1, 1, 1, 9, null, null, 1, 1, 1, 1, null, null, 1, 3, null, null, 1, 1, null, null, 1, 1, null, null, 1, 1, null, null, 1, 1, null, null, 1, 1, null, null, 1, null, 1, null, null], "covered_strength": 1.4, "covered_lines": 23, "lines_of_code": 23 }], "metrics": { "covered_percent": 72.79549718574108, "covered_strength": 321.0551594746717, "covered_lines": 388, "total_lines": 533 } } ``` # sonar-project.properties ```auto sonar.projectKey="KEY" sonar.projectName="Mytool" sonar.projectVersion="v0.1.0" sonar.sourceEncoding=UTF-8 sonar.sources=lib sonar.exclusions= **/node_modules/** ,**/*_spec.rb sonar.tests=spec sonar.test.inclusions=**/*_spec.rb sonar.ruby.coverage.reportPaths=./test-build/coverage.json sonar.ruby.rubocop.reportPaths=./test-build/rubocop-report.json ``` # Environment - SonarQube v. 7.4 (build 18908) - SonarRuby Plugin v. 1.4.0 (build 155) - Scanner v. 3.0.3.778 - Ruby v. 2.5.0 - SimpleCov v. 0.16.1 - SimpleCov-Json v. 0.2 ---
**Author:** ![czurn](https://dub1.discourse-cdn.com/sonarsource/user_avatar/community.sonarsource.com/czurn/32/28_2.png) [@czurn](https://community.sonarsource.com/u/czurn)\ **Post date:** [January 29, 2019, 10:04am UTC](https://community.sonarsource.com/t/classcastexception-while-parsing-simplecov-json/6117/2 "2019-01-29T10:04:08Z")
Hello @Tharnilich, Thank you for the detailed information, it makes it much easier to help you 🙂 Your problem is that the SimpleCov coverage report to be imported is not the one generated by the SimpleCov-JSON formatter. SimpleCov itself, by default, also creates a JSON report file on top of the html report. This report to be imported is the file `coverage/.resultset.json`, which has a different format compared to the SimpleCov-JSON report. Importing this file instead should fix your issue. Best, -Chris ---
**Author:** ![Tharnilich](https://avatars.discourse-cdn.com/v4/letter/t/cab0a1/32.png) [@Tharnilich](https://community.sonarsource.com/u/Tharnilich)\ **Post date:** [January 29, 2019, 10:19am UTC](https://community.sonarsource.com/t/classcastexception-while-parsing-simplecov-json/6117/3 "2019-01-29T10:19:50Z")
Hello @czurn, Thank you, it works!