动态分支的使用问题

[kekang1991aaa]

为了您的问题能得到及时准确解答，请认真填写下面各个选项，感谢您的配合。

• 当前使用的UFlo的具体版本号：

uflo2.1.4

• 遇到的问题详细描述：

1：动态分支集合类型变量来源配置，只要配置中加入引号，部署就会报错
2：动态分支集合类型变量来源配置完成后，完成任务就会报错
to：能否给我一个关于动态分支配置的详细示例，给我试下，现在wiki上的使用说明配置完全不行。
流程截图传不上去。。。。。。。

• 涉及到的异常信息（完整异常信息）：

Hibernate: select task0_.ID_ as ID_1_0_0_, task0_.DESCRIPTION_ as DESCRIPT2_0_0_, task0_.NODE_NAME_ as NODE_NAM3_0_0_, task0_.PROCESS_ID_ as PROCESS_4_0_0_, task0_.ASSIGNEE_ as ASSIGNEE1_14_0_, task0_.BUSINESS_ID_ as BUSINESS2_14_0_, task0_.COUNTERSIGN_COUNT_ as COUNTERS3_14_0_, task0_.CREATE_DATE_ as CREATE_D4_14_0_, task0_.DATE_UNIT_ as DATE_UNI5_14_0_, task0_.DUE_ACTION_DATE_ as DUE_ACTI6_14_0_, task0_.DUEDATE_ as DUEDATE_7_14_0_, task0_.END_DATE_ as END_DATE8_14_0_, task0_.OPINION_ as OPINION_9_14_0_, task0_.OWNER_ as OWNER_10_14_0_, task0_.PREV_STATE_ as PREV_ST11_14_0_, task0_.PREV_TASK_ as PREV_TA12_14_0_, task0_.PRIORITY_ as PRIORIT13_14_0_, task0_.PROCESS_INSTANCE_ID_ as PROCESS14_14_0_, task0_.PROGRESS_ as PROGRES15_14_0_, task0_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PR16_14_0_, task0_.STATE_ as STATE_17_14_0_, task0_.SUBJECT_ as SUBJECT18_14_0_, task0_.TASK_NAME_ as TASK_NA19_14_0_, task0_.TYPE_ as TYPE_20_14_0_, task0_.URL_ as URL_21_14_0_ from UFLO_TASK task0_ where task0_.ID_=?
Hibernate: update UFLO_TASK set DESCRIPTION_=?, NODE_NAME_=?, PROCESS_ID_=?, ASSIGNEE_=?, BUSINESS_ID_=?, COUNTERSIGN_COUNT_=?, CREATE_DATE_=?, DATE_UNIT_=?, DUE_ACTION_DATE_=?, DUEDATE_=?, END_DATE_=?, OPINION_=?, OWNER_=?, PREV_STATE_=?, PREV_TASK_=?, PRIORITY_=?, PROCESS_INSTANCE_ID_=?, PROGRESS_=?, ROOT_PROCESS_INSTANCE_ID_=?, STATE_=?, SUBJECT_=?, TASK_NAME_=?, TYPE_=?, URL_=? where ID_=?
Hibernate: select task0_.ID_ as ID_1_0_0_, task0_.DESCRIPTION_ as DESCRIPT2_0_0_, task0_.NODE_NAME_ as NODE_NAM3_0_0_, task0_.PROCESS_ID_ as PROCESS_4_0_0_, task0_.ASSIGNEE_ as ASSIGNEE1_14_0_, task0_.BUSINESS_ID_ as BUSINESS2_14_0_, task0_.COUNTERSIGN_COUNT_ as COUNTERS3_14_0_, task0_.CREATE_DATE_ as CREATE_D4_14_0_, task0_.DATE_UNIT_ as DATE_UNI5_14_0_, task0_.DUE_ACTION_DATE_ as DUE_ACTI6_14_0_, task0_.DUEDATE_ as DUEDATE_7_14_0_, task0_.END_DATE_ as END_DATE8_14_0_, task0_.OPINION_ as OPINION_9_14_0_, task0_.OWNER_ as OWNER_10_14_0_, task0_.PREV_STATE_ as PREV_ST11_14_0_, task0_.PREV_TASK_ as PREV_TA12_14_0_, task0_.PRIORITY_ as PRIORIT13_14_0_, task0_.PROCESS_INSTANCE_ID_ as PROCESS14_14_0_, task0_.PROGRESS_ as PROGRES15_14_0_, task0_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PR16_14_0_, task0_.STATE_ as STATE_17_14_0_, task0_.SUBJECT_ as SUBJECT18_14_0_, task0_.TASK_NAME_ as TASK_NA19_14_0_, task0_.TYPE_ as TYPE_20_14_0_, task0_.URL_ as URL_21_14_0_ from UFLO_TASK task0_ where task0_.ID_=?
Hibernate: select processins0_.ID_ as ID_1_13_0_, processins0_.BUSINESS_ID_ as BUSINESS2_13_0_, processins0_.CREATE_DATE_ as CREATE_D3_13_0_, processins0_.CURRENT_NODE_ as CURRENT_4_13_0_, processins0_.CURRENT_TASK_ as CURRENT_5_13_0_, processins0_.HIS_PROCESS_INSTANCE_ID_ as HIS_PROC6_13_0_, processins0_.PARALLEL_INSTANCE_COUNT_ as PARALLEL7_13_0_, processins0_.PARENT_ID_ as PARENT_I8_13_0_, processins0_.PROCESS_ID_ as PROCESS_9_13_0_, processins0_.PROMOTER_ as PROMOTE10_13_0_, processins0_.ROOT_ID_ as ROOT_ID11_13_0_, processins0_.STATE_ as STATE_12_13_0_, processins0_.SUBJECT_ as SUBJECT13_13_0_, processins0_.TAG_ as TAG_14_13_0_ from UFLO_PROCESS_INSTANCE processins0_ where processins0_.ID_=?
Hibernate: select this_.ID_ as ID_2_18_0_, this_.KEY_ as KEY_3_18_0_, this_.PROCESS_INSTANCE_ID_ as PROCESS_4_18_0_, this_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PRO5_18_0_, this_.BLOB_ID_ as BLOB_ID_6_18_0_, this_.BOOLEAN_VALUE_ as BOOLEAN_7_18_0_, this_.BYTE_VALUE_ as BYTE_VAL8_18_0_, this_.CHARACTER_VALUE_ as CHARACTE9_18_0_, this_.DATE_VALUE_ as DATE_VA10_18_0_, this_.DOUBLE_VALUE_ as DOUBLE_11_18_0_, this_.FLOAT_VALUE_ as FLOAT_V12_18_0_, this_.INTEGER_VALUE_ as INTEGER13_18_0_, this_.LONG_VALUE_ as LONG_VA14_18_0_, this_.SHORT_VALUE_ as SHORT_V15_18_0_, this_.STRING_VALUE_ as STRING_16_18_0_, this_.TYPE_ as TYPE_1_18_0_ from UFLO_VARIABLE this_ where this_.PROCESS_INSTANCE_ID_=? and this_.KEY_=?
Hibernate: select this_.ID_ as ID_1_0_0_, this_.DESCRIPTION_ as DESCRIPT2_0_0_, this_.NODE_NAME_ as NODE_NAM3_0_0_, this_.PROCESS_ID_ as PROCESS_4_0_0_, this_.CREATE_DATE_ as CREATE_D1_6_0_, this_.END_DATE_ as END_DATE2_6_0_, this_.HIS_PROCESS_INSTANCE_ID_ as HIS_PROC3_6_0_, this_.LEAVE_FLOW_NAME_ as LEAVE_FL4_6_0_, this_.PROCESS_INSTANCE_ID_ as PROCESS_5_6_0_, this_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PRO6_6_0_ from UFLO_HIS_ACTIVITY this_ where this_.PROCESS_INSTANCE_ID_=? and this_.END_DATE_ is null and this_.NODE_NAME_=?
Hibernate: insert into UFLO_HIS_TASK (DESCRIPTION_, NODE_NAME_, PROCESS_ID_, ASSIGNEE_, BUSINESS_ID_, CREATE_DATE_, DUEDATE_, END_DATE_, HIS_PROCESS_INSTANCE_ID_, OPINION_, OWNER_, PROCESS_INSTANCE_ID_, ROOT_PROCESS_INSTANCE_ID_, STATE_, SUBJECT_, TASK_ID_, TASK_NAME_, TYPE_, URL_, ID_) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate: insert into UFLO_VARIABLE (KEY_, PROCESS_INSTANCE_ID_, ROOT_PROCESS_INSTANCE_ID_, STRING_VALUE_, TYPE_, ID_) values (?, ?, ?, ?, 'String', ?)
Hibernate: update UFLO_TASK set DESCRIPTION_=?, NODE_NAME_=?, PROCESS_ID_=?, ASSIGNEE_=?, BUSINESS_ID_=?, COUNTERSIGN_COUNT_=?, CREATE_DATE_=?, DATE_UNIT_=?, DUE_ACTION_DATE_=?, DUEDATE_=?, END_DATE_=?, OPINION_=?, OWNER_=?, PREV_STATE_=?, PREV_TASK_=?, PRIORITY_=?, PROCESS_INSTANCE_ID_=?, PROGRESS_=?, ROOT_PROCESS_INSTANCE_ID_=?, STATE_=?, SUBJECT_=?, TASK_NAME_=?, TYPE_=?, URL_=? where ID_=?
Hibernate: update UFLO_PROCESS_INSTANCE set BUSINESS_ID_=?, CREATE_DATE_=?, CURRENT_NODE_=?, CURRENT_TASK_=?, HIS_PROCESS_INSTANCE_ID_=?, PARALLEL_INSTANCE_COUNT_=?, PARENT_ID_=?, PROCESS_ID_=?, PROMOTER_=?, ROOT_ID_=?, STATE_=?, SUBJECT_=?, TAG_=? where ID_=?
Hibernate: update UFLO_HIS_ACTIVITY set DESCRIPTION_=?, NODE_NAME_=?, PROCESS_ID_=?, CREATE_DATE_=?, END_DATE_=?, HIS_PROCESS_INSTANCE_ID_=?, LEAVE_FLOW_NAME_=?, PROCESS_INSTANCE_ID_=?, ROOT_PROCESS_INSTANCE_ID_=? where ID_=?
Hibernate: select this_.ID_ as ID_1_0_0_, this_.DESCRIPTION_ as DESCRIPT2_0_0_, this_.NODE_NAME_ as NODE_NAM3_0_0_, this_.PROCESS_ID_ as PROCESS_4_0_0_, this_.CREATE_DATE_ as CREATE_D1_6_0_, this_.END_DATE_ as END_DATE2_6_0_, this_.HIS_PROCESS_INSTANCE_ID_ as HIS_PROC3_6_0_, this_.LEAVE_FLOW_NAME_ as LEAVE_FL4_6_0_, this_.PROCESS_INSTANCE_ID_ as PROCESS_5_6_0_, this_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PRO6_6_0_ from UFLO_HIS_ACTIVITY this_ where this_.PROCESS_INSTANCE_ID_=? and this_.END_DATE_ is null and this_.NODE_NAME_=?
Hibernate: select historyact_.ID_, historyact_.DESCRIPTION_ as DESCRIPT2_0_, historyact_.NODE_NAME_ as NODE_NAM3_0_, historyact_.PROCESS_ID_ as PROCESS_4_0_, historyact_.CREATE_DATE_ as CREATE_D1_6_, historyact_.END_DATE_ as END_DATE2_6_, historyact_.HIS_PROCESS_INSTANCE_ID_ as HIS_PROC3_6_, historyact_.LEAVE_FLOW_NAME_ as LEAVE_FL4_6_, historyact_.PROCESS_INSTANCE_ID_ as PROCESS_5_6_, historyact_.ROOT_PROCESS_INSTANCE_ID_ as ROOT_PRO6_6_ from UFLO_HIS_ACTIVITY historyact_ where historyact_.ID_=?
2018-08-28 18:24:18.342 INFO 19956 --- [nio-8080-exec-6] c.b.u.expr.impl.ExpressionContextImpl : Named 'aaa','bbb','ccc' variable was not found in ProcessInstance 1737
Hibernate: select this_.ID_ as ID_1_13_0_, this_.BUSINESS_ID_ as BUSINESS2_13_0_, this_.CREATE_DATE_ as CREATE_D3_13_0_, this_.CURRENT_NODE_ as CURRENT_4_13_0_, this_.CURRENT_TASK_ as CURRENT_5_13_0_, this_.HIS_PROCESS_INSTANCE_ID_ as HIS_PROC6_13_0_, this_.PARALLEL_INSTANCE_COUNT_ as PARALLEL7_13_0_, this_.PARENT_ID_ as PARENT_I8_13_0_, this_.PROCESS_ID_ as PROCESS_9_13_0_, this_.PROMOTER_ as PROMOTE10_13_0_, this_.ROOT_ID_ as ROOT_ID11_13_0_, this_.STATE_ as STATE_12_13_0_, this_.SUBJECT_ as SUBJECT13_13_0_, this_.TAG_ as TAG_14_13_0_ from UFLO_PROCESS_INSTANCE this_ where this_.PARENT_ID_=?
2018-08-28 18:24:18.366 ERROR 19956 --- [nio-8080-exec-6] o.a.c.c.C.[.[.[/].[ufloServlet] : Servlet.service() for servlet [ufloServlet] in context with path [] threw exception [javax.servlet.ServletException: java.lang.reflect.InvocationTargetException] with root cause

java.lang.IllegalArgumentException: ForeachHandler [${'aaa','bbb','ccc'}] return value type must be a collection or a array!
at com.bstek.uflo.process.node.ForeachNode.enter(ForeachNode.java:70) ~[classes/:na]
at com.bstek.uflo.process.flow.SequenceFlowImpl.execute(SequenceFlowImpl.java:74) ~[classes/:na]
at com.bstek.uflo.process.node.Node.leaveNode(Node.java:96) ~[classes/:na]
at com.bstek.uflo.process.node.TaskNode.leave(TaskNode.java:607) ~[classes/:na]
at com.bstek.uflo.command.impl.CompleteTaskCommand.execute(CompleteTaskCommand.java:102) ~[classes/:na]
at com.bstek.uflo.command.impl.CompleteTaskCommand.execute(CompleteTaskCommand.java:1) ~[classes/:na]
at com.bstek.uflo.command.impl.SpringTransactionCommandService$1.doInTransaction(SpringTransactionCommandService.java:53) ~[classes/:na]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at com.bstek.uflo.command.impl.SpringTransactionCommandService.executeCommand(SpringTransactionCommandService.java:51) ~[classes/:na]
at com.bstek.uflo.service.impl.DefaultTaskService.complete(DefaultTaskService.java:226) ~[classes/:na]
at com.bstek.uflo.service.impl.DefaultTaskService.complete(DefaultTaskService.java:238) ~[classes/:na]
at com.bstek.uflo.console.handler.impl.central.CentralServletHandler.completeTask(CentralServletHandler.java:207) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_111]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_111]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_111]
at com.bstek.uflo.console.handler.BaseServletHandler.invokeMethod(BaseServletHandler.java:36) ~[classes/:na]
at com.bstek.uflo.console.handler.impl.central.CentralServletHandler.execute(CentralServletHandler.java:69) ~[classes/:na]
at com.bstek.uflo.console.UfloServlet.service(UfloServlet.java:82) ~[classes/:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at com.shxhome.ufloTest.TestFilter.doFilter(TestFilter.java:23) ~[classes/:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_111]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_111]

2018-08-28 18:24:18.373 ERROR 19956 --- [nio-8080-exec-6] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] threw exception

java.lang.IllegalStateException: getWriter() has already been called for this response
at org.apache.catalina.connector.Response.getOutputStream(Response.java:590) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:194) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:100) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.http.server.ServletServerHttpResponse.getBody(ServletServerHttpResponse.java:89) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:251) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:106) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:203) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at com.shxhome.ufloTest.TestFilter.doFilter(TestFilter.java:23) ~[classes/:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:590) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:524) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:389) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:254) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:349) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:175) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_111]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_111]

2018-08-28 18:24:18.376 ERROR 19956 --- [nio-8080-exec-6] o.a.c.c.C.[Tomcat].[localhost] : Exception Processing ErrorPage[errorCode=0, location=/error]

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalStateException: getWriter() has already been called for this response
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at com.shxhome.ufloTest.TestFilter.doFilter(TestFilter.java:23) ~[classes/:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:590) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:524) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:389) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:254) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:349) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:175) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457) [tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_111]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.20.jar:8.5.20]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_111]
Caused by: java.lang.IllegalStateException: getWriter() has already been called for this response
at org.apache.catalina.connector.Response.getOutputStream(Response.java:590) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:194) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:100) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
at org.springframework.http.server.ServletServerHttpResponse.getBody(ServletServerHttpResponse.java:89) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:251) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:106) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:203) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.11.RELEASE.jar:4.3.11.RELEASE]
... 41 common frames omitted

• 相关截图：

[youseries]

java.lang.IllegalArgumentException: ForeachHandler [${'aaa','bbb','ccc'}] return value type must be a collection or a array!
异常提示的很清楚了。