The fail.on.missing.attributes="false" is not working with the source mapper

[Methma]

Description:
The fail.on.missing.attributes="false" is not working with the source mapper. No errors related to the property in the error log and a mapping failed error is printed in the carbon log when empty values are passed for mapped attributes.

ERROR {io.siddhi.extension.map.json.sourcemapper.JsonSourceMapper} - Invalid Json String : {
. . .
}' , for the input Mapping 'json' for the stream 'InputStream'. io.siddhi.core.exception.MappingFailedException
at io.siddhi.extension.map.json.sourcemapper.JsonSourceMapper.mapAndProcess(JsonSourceMapper.java:260)
at io.siddhi.core.stream.input.source.SourceMapper.onEvent(SourceMapper.java:201)
at io.siddhi.core.stream.input.source.SourceMapper.onEvent(SourceMapper.java:145)
at io.siddhi.extension.io.http.source.HttpWorkerThread.run(HttpWorkerThread.java:73)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)

Affected Product Version:
SI 4.2.0