java.lang.NullPointerException: This exception has no message.

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Thrown when an application is trying to use or access an object whose reference equals to null but if you are getting no message, try using the option -XX:-OmitStackTraceInFastThrow.

Solutions on the web

via Stack Overflow by Kevin
, 1 year ago
via Coderanch by B Law, 1 year ago
This exception has no message.
via GitHub by yunus89
, 1 year ago
This exception has no message.
via GitHub by yunus89
, 1 year ago
This exception has no message.
via Stack Overflow by Studeo9999
, 2 years ago
java.lang.NullPointerException:
at java.io.Reader.(Reader.java:78)
at java.io.InputStreamReader.(InputStreamReader.java:72)
at org.wso2.carbon.mediator.datamapper.engine.input.readers.JSONInputReader.readFromInputStream(JSONInputReader.java:76)
at org.wso2.carbon.mediator.datamapper.engine.input.readers.JSONInputReader.read(JSONInputReader.java:59)
at org.wso2.carbon.mediator.datamapper.engine.input.InputBuilder.buildInputModel(InputBuilder.java:59)
at org.wso2.carbon.mediator.datamapper.engine.core.mapper.MappingHandler.doMap(MappingHandler.java:67)
at org.wso2.carbon.mediator.datamapper.DataMapperMediator.transform(DataMapperMediator.java:306)
at org.wso2.carbon.mediator.datamapper.DataMapperMediator.mediate(DataMapperMediator.java:256)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:95)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:57)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
at org.apache.synapse.mediators.eip.aggregator.AggregateMediator.completeAggregate(AggregateMediator.java:447)
at org.apache.synapse.mediators.eip.aggregator.AggregateMediator.mediate(AggregateMediator.java:330)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:95)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:57)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
at org.apache.synapse.rest.Resource.process(Resource.java:325)
at org.apache.synapse.rest.API.process(API.java:338)
at org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.java:125)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:101)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:56)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:300)
at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:554)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:255)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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