问题现象描述
项目中使用了activiti作为工作流引擎，为了使用更加方便，自己开发了一套流程设置功能。先构建BpmnModel对象，再使用RepositoryService提供的deploy方法动态部署到activiti中。
功能开发完成后，开发本地测试和一轮测试之前都是OK的。然后前几日，在回归测试的时候，出现了某些用户可以成功部署，某些用户无法成功部署的“奇怪”现象。观察后台无法部署的后台错误日志：
org.activiti.bpmn.exceptions.XMLException: cvc-datatype-valid.1.2.1: '0785bf15-8d5d-11e7-8f8f-5254004a5833_39abc790-91fa-11e7-9e50-5254004a5833_loan' is not a valid value for 'NCName'.
at org.activiti.bpmn.converter.BpmnXMLConverter.convertToBpmnModel(BpmnXMLConverter.java:280)
at org.activiti.engine.impl.bpmn.parser.BpmnParse.execute(BpmnParse.java:187)
at org.activiti.engine.impl.bpmn.deployer.BpmnDeployer.deploy(BpmnDeployer.java:136)
at org.activiti.engine.impl.persistence.deploy.DeploymentManager.deploy(DeploymentManager.java:58)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:106)
at org.activiti.engine.impl.cmd.DeployCmd.execute(DeployCmd.java:37)
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.RepositoryServiceImpl.deploy(RepositoryServiceImpl.java:79)
at org.activiti.engine.impl.repository.DeploymentBuilderImpl.deploy(DeploymentBuilderImpl.java:156)
at com.jinzay.platform.activiti.helper.service.ActivitiEngineService.repositoryDeployment(ActivitiEngineService.java:158)
at com.jinzay.ees.mst.service.api.MstProcessConfigController.deploy(MstProcessConfigController.java:282)
at com.jinzay.ees.mst.service.api.MstProcessConfigController$$FastClassBySpringCGLIB$$e14ce3a5.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:669)
at com.jinzay.ees.mst.service.api.MstProcessConfigController$$EnhancerBySpringCGLIB$$f5ce0d0c.deploy(<generated>)
at sun.reflect.GeneratedMethodAccessor556.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:211)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:809)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.xml.sax.SAXParseException: cvc-datatype-valid.1.2.1: '0785bf15-8d5d-11e7-8f8f-5254004a5833_39abc790-91fa-11e7-9e50-5254004a5833_loan' is not a valid value for 'NCName'.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:452)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3230)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processOneAttribute(XMLSchemaValidator.java:2825)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processAttributes(XMLSchemaValidator.java:2762)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:2050)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:740)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.jaxp.validation.StreamValidatorHelper.validate(StreamValidatorHelper.java:155)
at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:116)
at javax.xml.validation.Validator.validate(Validator.java:124)
at org.activiti.bpmn.converter.BpmnXMLConverter.validateModel(BpmnXMLConverter.java:214)
at org.activiti.bpmn.converter.BpmnXMLConverter.convertToBpmnModel(BpmnXMLConverter.java:269)
... 97 common frames omitted
问题解决过程
这个报错的意思大概是：
xml sechma校验中，字符串'0785bf15-8d5d-11e7-8f8f-5254004a5833_39abc790-91fa-11e7-9e50-5254004a5833_loan'不是合法的'NCName'类型。
于是想着百度看看NCName是什么类型，有什么约束。然后似乎没有一篇能说明白。试探了多次，发现:
原来是不能以数字开头！
为了证实想法，借助谷歌终于弄清楚了。NCName只能以下划线(_)或字母开头，只能包含中划线(-)、下划线、字母和数字，我们的流程ID是按单位ID+'_'+部门ID规则拼接的，而单位ID是随机生成的字符串，所以有的是以数字开头的就无法部署。最终，我们更改了单位ID的 生成规则，保证是字母开头(多么简单粗暴的solution...)。
常用的XML内置类型
-
XML Schema 内置简单类型：
- string 字符数据类型
模式处理器在处理string类型的值时，会将值中所有空白字符包括空格、制表符、回车换行都保留。
- normalizedString
派生自string，与string不同的地方：模式处理器对空白的处理方式，处理器会将读到的 每一个回车、换行和制表符替换为单个空格字符。
- token
派生自normalizedString，模式处理器对 于此类型的内容时，会用单个空格来替换读到的每一个回车、换行和制表符，替换后，每一组连续的空格被压缩为一个空格字符，而所有前导和后导空格被删除。
- Name
派生自token，它表示一个XML名称，即该类型的值必须以字母、下划线(_)或冒号(:)开头，而且只能包含字母、数字、连字符、下划线、冒号或句号(.)。
- NCName
继承自Name，表示一个XML无冒号的名称，即该名称中不能使用冒号。它与Name类似，唯一的区别就是不能使用冒号。
-
数字类型
- float和double(单精度和双精度浮点数)
float数据类型表示IEEE单精度32位浮点数，而double表示IEEEE双精度64位浮点数。
- decimal
数据类型decimal表示任意精度的小数，不同的模式处理器支持的有效位数是不一样的，不过XML Schema推荐标准中要求符合规范的模式处理器必须至少支持18位有效数字。
- integer
数据类型integer派生自decimal，表示一个任意大的整数。从integer数据类型派生了其他十二中内置的整数类型。
-
日期和时间类型
- date
用于表示日期。date的格式为:YYYY-MM-DD。要表示9999年之后的年份，在年值左边添加数字，但不允许前导0；表示公元前的年，可以在年值钱添加负号-。可以在日期值之后添加时区表达式，或者字母‘Z’，表示UTC时间。
- time
表示时间。time的格式是：hh:mm:ss.sss。时间是24小时制。可以在时间值之后添加可选的时间表达式，或者添加字母‘Z’，表示是UTC时间。
- dateTime
表示完整的日期和时间，即date+time，本类型的格式为YYYY-MM-DDThh:mm:ss.sss，字母T作为日期和时间的分割。可以在dateTime值之后添加可选的时区表达式，或者添加字符’Z’。
- gYear
表示一个特定的阳历年，格式为: YYYY
- gYearMonth
表示一个特定年的某月，格式: YYYY-MM
- gMonth
表示某个月，格式为: --MM
- gMonthDay
表示某个月的某天，格式： --MM-DD (8) gDay 表示某天，格式为: ---DD
- duration
表示持续时间。格式为：PnYnMnDTnHnMnS。 示例：P2Y3M4DT23H12M15.6S
-
其他数据类型
- boolean
表示逻辑值，有效值是true,false,0,1
- anyURI
表示一个统一资源标示符的引用。
- QName
表示XML名称空间限定名。Qname值包括一个名称空间前缀和本地部分(这两部分都是NCName类型)，中间用冒号分隔。
