org.apache.thrift.protocol.TProtocolException: Required field 'statusCode' was not found in serialized data! Struct: com.meituan.itc.udm.mustang.thrift.JudgeResponse$JudgeResponseStandardScheme@689774fc
at com.meituan.itc.udm.mustang.thrift.JudgeResponse$JudgeResponseStandardScheme.read(JudgeResponse.java:789)
at com.meituan.itc.udm.mustang.thrift.JudgeResponse$JudgeResponseStandardScheme.read(JudgeResponse.java:692)
at com.meituan.itc.udm.mustang.thrift.JudgeResponse.read(JudgeResponse.java:603)
at com.meituan.itc.udm.mustang.thrift.MustangService$judgeUserCondition_result$judgeUserCondition_resultStandardScheme.read(MustangService.java:1119)
at com.meituan.itc.udm.mustang.thrift.MustangService$judgeUserCondition_result$judgeUserCondition_resultStandardScheme.read(MustangService.java:1104)
at com.meituan.itc.udm.mustang.thrift.MustangService$judgeUserCondition_result.read(MustangService.java:1055)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at com.meituan.itc.udm.mustang.thrift.MustangService$Client.recv_judgeUserCondition(MustangService.java:96)
at com.meituan.itc.udm.mustang.thrift.MustangService$Client.judgeUserCondition(MustangService.java:83)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.meituan.service.mobile.mtthrift.client.invoker.MTThriftMethodInterceptor.syncRpcInvoke(MTThriftMethodInterceptor.java:417)
at com.meituan.service.mobile.mtthrift.client.invoker.MTThriftMethodInterceptor.getRpcResult(MTThriftMethodInterceptor.java:360)
at com.meituan.service.mobile.mtthrift.client.invoker.MTThriftMethodInterceptor.doInvoke(MTThriftMethodInterceptor.java:259)
at com.meituan.dorado.rpc.handler.filter.InvokeChainBuilder$1.handle(InvokeChainBuilder.java:40)
at com.meituan.trip.resilience.hystrix.extension.HystrixMTThriftInvokerFilter.filter(HystrixMTThriftInvokerFilter.java:80)
at com.meituan.dorado.rpc.handler.filter.InvokeChainBuilder$3.handle(InvokeChainBuilder.java:87)
at com.meituan.service.mobile.mtthrift.client.invoker.MTThriftMethodInterceptor.invoke(MTThriftMethodInterceptor.java:127)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy123.judgeUserCondition(Unknown Source)
at com.meituan.fe.evolve.activity.test.T.testPersona(T.java:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
在 thrift 中，对于参数和返回值为 struct 的，编解码都是相应的 struct 对应的类。
而 struct.validate() 只检查引用类型。
public void validate() throws org.apache.thrift.TException {
// check for required fields
// alas, we cannot check 'statusCode' because it's a primitive and you chose the non-beans generator.
if (judgeResults == null) {
throw new org.apache.thrift.protocol.TProtocolException("Required field 'judgeResults' was not present! Struct: " + toString());
}
}
com.meituan.itc.udm.mustang.thrift.JudgeResponse.JudgeResponseStandardScheme#write
没有对 statusCode 的检查。
读取 TType.MAP 过后直接读取到 TType.STOP（对应于oprot.writeFieldStop()）
statusCode 编号为 -1 ？
说明，它的 thrift 文件 statusCode 索引为0。
编号为 0代表字段的结束
namespace java com.meituan.model
struct Pair {
0: required string key;
1: required string value;
}
这时候 key 的编号为-1，value 的编号为1。
JudgeResponse 的写入在服务端，调用的是如下的 write 方法，对于 statusCode 一定是写入的。
那么该 bug 又是怎么出现的呢？
tcpdump 抓包
0c success 的类型 STRUCT
扫描二维码关注公众号，回复：
10777735 查看本文章
00 00 success 的索引 0
0d judgeResults 的类型 MAP
00 01 judgeResults 的索引 1
00 00 字段结束标记
确实没有 statusCode 属性。
根源：
而最新版本加入了 statusCode 字段，而且索引设置为0=。=
