qxo opened a new issue #3135: createEntrySpan should get SamplingService  only 
if  it required ( carrier is valid: move #L90 after #L93  )
URL: https://github.com/apache/skywalking/issues/3135
 
 
   
https://github.com/apache/skywalking/blob/c7916d9f2715ff9d3c415f86418d8f81c97a21e7/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ContextManager.java#L90
   
   
https://github.com/apache/skywalking/blob/c7916d9f2715ff9d3c415f86418d8f81c97a21e7/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/context/ContextManager.java#L93
   ```
   public static AbstractSpan createEntrySpan(String operationName, 
ContextCarrier carrier) {
           SamplingService samplingService = 
ServiceManager.INSTANCE.findService(SamplingService.class);
           AbstractSpan span;
           AbstractTracerContext context;
           if (carrier != null && carrier.isValid()) {
               samplingService.forceSampled();
               context = getOrCreate(operationName, true);
               span = context.createEntrySpan(operationName);
               context.extract(carrier);
           } else {
               context = getOrCreate(operationName, false);
               span = context.createEntrySpan(operationName);
           }
           return span;
       }
   ```

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