ESlint Import doesnt work because of invalid JSON syntax

Hey!
I tried to include EsLint reports to my Sonarcloud Reports.

According to the documentation i use eslint src -f json -o eslint_report.json to generate my Report. I am trying it locally with sonarScanner and also on Sonarcloud
In the sonar-properties i have the path to the report set and it finds it, but i got an error message, that SonarScanner cannot read the eslint Report.
I get the following exception. How can i solve this problem?

ERROR: Error during SonarScanner execution
java.lang.IllegalStateException: Failed to read external issues report 'C:\Users\XXX\XXX\eslint_report.json': invalid JSON syntax
        at org.sonar.scanner.externalissue.ExternalIssueReportParser.parse(ExternalIssueReportParser.java:42)
        at org.sonar.scanner.externalissue.ExternalIssuesImportSensor.execute(ExternalIssuesImportSensor.java:57)
        at org.sonar.scanner.sensor.AbstractSensorWrapper.analyse(AbstractSensorWrapper.java:62)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:75)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.lambda$execute$1(ModuleSensorsExecutor.java:48)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.withModuleStrategy(ModuleSensorsExecutor.java:66)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:48)
        at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:64)
        at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
        at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
        at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:192)
        at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:188)
        at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:159)
        at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
        at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
        at org.sonar.scanner.bootstrap.ScannerContainer.doAfterStart(ScannerContainer.java:399)
        at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
        at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
        at org.sonar.scanner.bootstrap.GlobalContainer.doAfterStart(GlobalContainer.java:128)
        at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:123)
        at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:109)
        at org.sonar.batch.bootstrapper.Batch.doExecute(Batch.java:58)
        at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:52)
        at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:46)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
        at jdk.proxy1/jdk.proxy1.$Proxy0.execute(Unknown Source)
        at org.sonarsource.scanner.cli.Main.execute(Main.java:126)
        at org.sonarsource.scanner.cli.Main.execute(Main.java:81)
        at org.sonarsource.scanner.cli.Main.main(Main.java:62)
Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:395)
        at com.google.gson.Gson.fromJson(Gson.java:1214)
        at com.google.gson.Gson.fromJson(Gson.java:1124)
        at com.google.gson.Gson.fromJson(Gson.java:1062)
        at org.sonar.scanner.externalissue.ExternalIssueReportParser.parse(ExternalIssueReportParser.java:36)
        ... 34 more
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $
        at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:393)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:384)
        ... 38 more

Hey there.

Can you upload the JSON report?

Problem solved, sonarCloud needs a custom formatter to be able to read the eslint report.
Please update the documentation, the -f json option doesn’t work.

@julia.viehberger , welcome to the community, and thanks for the report, the log and the solution. What did you have to do on your custom formatter to make the report work properly?

I still couldn’t get it to work completly.
But i need a custom Formatter that sonarcloud doesn’t complain about the report syntax. It is still not showing esLint issues in the overview