Intermittent error: No content to map due to end-of-input

[shanaloh]

hi guys,

I am quite new to Camel. We are using Camel 2.14.

I got this intermittent error which is quite annoying. It happens very
rarely and randomly. If I send the same request again, it will process just
fine.

2014-12-15 17:24:56.700 ERROR 1852673485@qtp-1010937526-2
common.exception.MTSErrorHandler Received Exception
com.fasterxml.jackson.databind.JsonMappingException: No content to map due
to end-of-input
at Source: org.apache.camel.converter.stream.InputStreamCache@64288413;
line: 1, column: 1

After searching this exception, I have seen many places where people suggest
to use stream caching. However in our case, stream caching is already used.
I am not sure however if it is set up properly.

Thanks in advance for any your inputs.

Cheers

Shan

*This is our camel context config*

<camel:camelContext id="camelContext" errorHandlerRef="errorHandler"
trace="${camel.trace:false}" streamCache="true">

When project starts up, this line indicates it is enabled:
2014-12-16 16:13:04.300 INFO  [main] [camel.spring.SpringCamelContext]
StreamCaching is enabled on CamelContext: camelContext



*This is our code.*


                RouteDefinition rdRouteDefinition = from( 
createListeningService()
).routeId( getRouteId() );
                rdRouteDefinition.wireTap(
ABCMaintenanceRouteDefinition.AUDIT_LOGGING.getCamelRoute() );
                rdRouteDefinition
                .process(new Processor() {

                        @Override
                        public void process(Exchange exchange) throws Exception 
{
                                _log.info("Before unmarshall()" );
                                _log.info("exchange body = " + 
exchange.getIn().getBody());
                                _log.info("exchange body size = " +
exchange.getIn().getBody(InputStreamCache.class).length());
                        }
                        
                })
                .unmarshal().json(JsonLibrary.Jackson, ExecutionRequest.class)
                .to(ABCRouteType.VALIDATOR.getRoutePrefix() + requestXsd)
                .convertBodyTo(FIXExecutionReport.class)
                .process(fixMessageProcessor)
                .wireTap( ABCRouteType.LOG.getRoutePrefix() + _log.getName() +
ABCGenericConstants.LOGGING_ROUTE_OPTIONS )
                .inOnly( routeType.getRoutePrefix() + publishingDestination );

                rdRouteDefinition.wireTap(
ABCMaintenanceRouteDefinition.AUDIT_LOGGING.getCamelRoute() );



*This is the logging *

2014-12-15 17:24:56.682 INFO 1852673485@qtp-1010937526-2  Before
unmarshall()
2014-12-15 17:24:56.682 INFO 1852673485@qtp-1010937526-2  exchange body =
org.apache.camel.converter.stream.InputStreamCache@64288413
2014-12-15 17:24:56.683 INFO 1852673485@qtp-1010937526-2  exchange body size
= 646

2014-12-15 17:24:56.700 ERROR 1852673485@qtp-1010937526-2
common.exception.ABCErrorHandler Received Exception
com.fasterxml.jackson.databind.JsonMappingException: No content to map due
to end-of-input
at Source: org.apache.camel.converter.stream.InputStreamCache@64288413;
line: 1, column: 1



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