com.alibaba.escar.core.exception.TransactionExcept

If the @GlobalTransactional is added to the sample code, the following error will be reported. If the @GlobalTransactional annotation is not added, it can be executed normally. What is the reason? // 样例代码中如果加上@GlobalTransactional就报下面的错误，如果不加@GlobalTransactional注解则可以正常执行，请问是啥原因？

2019-01-11 15:57:15,059 [FESCAR] [main] INFO com.alibaba.fescar.tm.dubbo.BusinessService - Main business begin ... xid: null 2019-01-11 15:57:27,709 [FESCAR] [main] DEBUG com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting - offer message: com.alibaba.fescar.core.protocol.transaction.GlobalBeginRequest@38a6964d 2019-01-11 15:57:57,712 [FESCAR] [main] ERROR com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting - wait response error:cost 30004 ms,ip:127.0.0.1:8091,request:com.alibaba.fescar.core.protocol.transaction.GlobalBeginRequest@38a6964d 2019-01-11 15:57:57,749 [FESCAR] [main] WARN com.alibaba.fescar.tm.api.DefaultFailureHandlerImpl - Failed to begin transaction. com.alibaba.fescar.core.exception.TransactionException: java.util.concurrent.TimeoutException: cost 30004 ms at com.alibaba.fescar.tm.DefaultTransactionManager.syncCall(DefaultTransactionManager.java:100) at com.alibaba.fescar.tm.DefaultTransactionManager.begin(DefaultTransactionManager.java:65) at com.alibaba.fescar.tm.api.DefaultGlobalTransaction.begin(DefaultGlobalTransaction.java:82) at com.alibaba.fescar.tm.api.TransactionalTemplate.execute(TransactionalTemplate.java:40) at com.alibaba.fescar.spring.annotation.GlobalTransactionalInterceptor.invoke(GlobalTransactionalInterceptor.java:51) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635) at com.alibaba.fescar.tm.dubbo.impl.BusinessServiceImpl$$EnhancerByCGLIB$$e0bc343.purchase() at com.alibaba.fescar.tm.dubbo.impl.BusinessServiceImpl.main(BusinessServiceImpl.java:62) Caused by: java.util.concurrent.TimeoutException: cost 30004 ms at com.alibaba.fescar.core.protocol.MessageFuture.get(MessageFuture.java:46) at com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting.sendAsyncRequest(AbstractRpcRemoting.java:265) at com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting.sendAsyncRequestWithResponse(AbstractRpcRemoting.java:194) at com.alibaba.fescar.core.rpc.netty.TmRpcClient.sendMsgWithResponse(TmRpcClient.java:196) at com.alibaba.fescar.core.rpc.netty.TmRpcClient.sendMsgWithResponse(TmRpcClient.java:216) at com.alibaba.fescar.tm.DefaultTransactionManager.syncCall(DefaultTransactionManager.java:98) ... 8 common frames omitted Exception in thread "main" java.lang.reflect.UndeclaredThrowableException at com.alibaba.fescar.tm.dubbo.impl.BusinessServiceImpl$$EnhancerByCGLIB$$e0bc343.purchase() at com.alibaba.fescar.tm.dubbo.impl.BusinessServiceImpl.main(BusinessServiceImpl.java:62) Caused by: com.alibaba.fescar.core.exception.TransactionException: java.util.concurrent.TimeoutException: cost 30004 ms at com.alibaba.fescar.tm.DefaultTransactionManager.syncCall(DefaultTransactionManager.java:100) at com.alibaba.fescar.tm.DefaultTransactionManager.begin(DefaultTransactionManager.java:65) at com.alibaba.fescar.tm.api.DefaultGlobalTransaction.begin(DefaultGlobalTransaction.java:82) at com.alibaba.fescar.tm.api.TransactionalTemplate.execute(TransactionalTemplate.java:40) at com.alibaba.fescar.spring.annotation.GlobalTransactionalInterceptor.invoke(GlobalTransactionalInterceptor.java:51) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635) ... 2 more Caused by: java.util.concurrent.TimeoutException: cost 30004 ms at com.alibaba.fescar.core.protocol.MessageFuture.get(MessageFuture.java:46) at com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting.sendAsyncRequest(AbstractRpcRemoting.java:265) at com.alibaba.fescar.core.rpc.netty.AbstractRpcRemoting.sendAsyncRequestWithResponse(AbstractRpcRemoting.java:194) at com.alibaba.fescar.core.rpc.netty.TmRpcClient.sendMsgWithResponse(TmRpcClient.java:196) at com.alibaba.fescar.core.rpc.netty.TmRpcClient.sendMsgWithResponse(TmRpcClient.java:216) at com.alibaba.fescar.tm.DefaultTransactionManager.syncCall(DefaultTransactionManager.java:98) ... 8 more

原提问者GitHub用户csfrez c