我有像这样的过程链
<int:chain input-channel="filesInChannel" output-channel="outJsonMap" >
<int:transformer id="confCombiner" ref="serviceCombiner" method="addConfig"/>
<int:header-enricher>
<int:header name="fileMatchConf" expression="payload.get('matchConf')"/>
<int:header name="fileName" expression="payload.get('file').getName()"/>
<int:header name="fileTimeProp" expression="payload.get('fileTimeProp')"/>
</int:header-enricher>
<int:transformer expression="payload.get('file')"/>
<int:transformer id="sasTransformer" ref="serviceTransformer" method="process" />
</int:chain>
最后一个过程是将sas文件转换为pojo。这个应用程序适用于大量文件，我们使用测试 - + 1000文件。我发现我的应用程序有奇怪的行为。有时应用程序会顺利处理所有文件，但有时应用程序会突然停止并出现异常，如下所示：
2016-06-29 09:47:05 44591 [Thread-1014] DEBUG org.springframework.jdbc.datasource.DataSourceUtils - Fetching JDBC Connection from DataSource
2016-06-29 09:47:05 44592 [executor-86] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'integrationHeaderChannelRegistry'
Exception in thread "executor-86" Exception in thread "Thread-1014" 2016-06-29 09:47:05 44112 [executor-31] DEBUG com.epam.parso.impl.SasFileParser - Column format: $
2016-06-29 09:47:05 44592 [executor-31] DEBUG com.epam.parso.impl.SasFileParser - Subheader process function name: FORMAT_AND_LABEL_SUBHEADER_INDEX
org.springframework.messaging.core.DestinationResolutionException: failed to look up MessageChannel with name 'errorChannel' in the BeanFactory.; nested exception is org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with na me 'errorChannel': Singleton bean creation not allowed while the singletons of this factory are in destruction (Do not request a b ean from a BeanFactory in a destroy method implementation!) at org.springframework.integration.support.channel.BeanFactoryChannelResolver.resolveDestination(BeanFactoryChannelResolver.java:112)
at org.springframework.integration.support.channel.BeanFactoryChannelResolver.resolveDestination(BeanFactoryChannelResolver.java:45)
at org.springframework.integration.channel.MessagePublishingErrorHandler.resolveErrorChannel(MessagePublishingErrorHandler.java:117)
at org.springframework.integration.channel.MessagePublishingErrorHandler.handleError(MessagePublishingErrorHandler.java:80)
at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:58)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
2016-06-29 09:47:05 44592 [executor-31]DEBUG com.epam.parso.impl.SasFileParser - Column format: $at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'errorChannel': Single ton bean creation not allowed while the singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:2 16)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
2016-06-29 09:47:05 44593 [executor-31] DEBUG com.epam.parso.impl.SasFileParser - Subheader process function name:
在该异常中，SasFileParser在方法“进程”中的serviceTransformer内被调用。
这是变换器代码的实现：
public JobMessage process(@Payload File file, @Headers MessageHeaders headers) throws IOException {
JobMessage jobMessage = new JobMessage();
logger.info("headers:"+headers.get("fileMatchConf"));
FileInputStream is = null;
String timestamp_datameerJob = String.valueOf(System.currentTimeMillis());
try {
// create message parser same like in SuccessUnwrapper
Adr adr = (Adr) headers.get("fileMatchConf");
is = new FileInputStream(file);
com.epam.parso.SasFileReader sasFileReader = new SasFileReaderImpl(is);
String fileName = file.getName();
String absolutePath = file.getAbsolutePath();
String dirCode = adr.getDirectoryCode();
String scenario = "";
String tableName = "";
String loadType = adr.getLoadType();
Path fileP = Paths.get(file.getAbsolutePath());
BasicFileAttributes attr = Files.readAttributes(fileP, BasicFileAttributes.class);
Long timestamp_createdDate = attr.creationTime().toMillis();
// get tableName
// check load_type (M,R) or (H,S)
if(loadType.toLowerCase().equals("m") || loadType.toLowerCase().equals("r")){
tableName = adr.getTargetTableName();
} else{
// check which scenario used
scenario = FileUtil.filePatternScenarioSelector(fileName);
logger.info("[SCENARIO] " + scenario);
if(scenario.equals("scenario2")){
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
String createdDate = formatter.format(new java.util.Date (timestamp_createdDate));
String mainFileName = fileName.split("\\.")[0];
tableName = mainFileName+"_"+createdDate+"_"+ dirCode;
} else if(scenario.equals("scenario1_3")){
tableName = NamingFunctionMapUtil.getInstance().getScenarioOneThree(fileName, dirCode).get("appendDirID");
}
}
// import job
ImportConstructor imc = new ImportConstructor(sasFileReader.getColumns(), fileName);
imc.constructImport(absolutePath, dirCode, timestamp_datameerJob); // real environment
ImportJob importJob = imc.getImportJob();
logger.info("[IMPORT_JOB] " + importJob);
// workbook job
WorkBookConstructor wrk = new WorkBookConstructor(importJob, fileName);
wrk.constructWorkbook(dirCode, timestamp_datameerJob);
id.lsa.scb.mappers.workbook.WorkBook workBook = wrk.getWorkBook();
logger.info("[WORKBOOK_JOB]" + workBook);
// export job
ExportConstructor exc = new ExportConstructor(sasFileReader.getColumns(), fileName, workBook);
exc.constructExportJob(adr.getTargetDatabase(), tableName, dirCode, timestamp_datameerJob);
id.lsa.scb.mappers.exportjob.ExportJob exportJob = exc.getExportJob();
logger.info("[EXPORT_JOB]" + exportJob);
jobMessage.setFileName(fileName);
jobMessage.setTableName(tableName);
jobMessage.setCountryCode(adr.getCountryCode());
jobMessage.setDirectoryPath(adr.getDirectoryPath());
jobMessage.setDirectoryCode(adr.getDirectoryCode());
jobMessage.setFilePatternUsed(adr.getFilePattern());
jobMessage.setTargetDatabase(adr.getTargetDatabase());
jobMessage.setLoadType(adr.getLoadType());
jobMessage.setImportJob(importJob);
jobMessage.setWorkBook(workBook);
jobMessage.setExportJob(exportJob);
jobMessage.setFileCredentials(constructCredentialFiles(file));
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException ioex){
String message= ioex.getMessage();
logger.error(message);
logToDb(headers,"failed","file-convert",message);
}
catch (Exception ex) {
ex.printStackTrace();
String message= ex.getMessage();
logToDb(headers,"failed","file-convert",message);
} finally {
if(is!=null) {
is.close();
is=null;
}
}
在“confCombiner”中我也得到了sas文件的属性：
Path fileP = Paths.get(file.getAbsolutePath());
BasicFileAttributes attr = null;
try {
attr = Files.readAttributes(fileP, BasicFileAttributes.class);
} catch (IOException e) {
e.printStackTrace();
}
Long fileCreatedTime = attr.creationTime().toMillis();
Long fileModifiedTime = attr.lastModifiedTime().toMillis();
任何人都有过这种例外的经历吗？怎么处理？或任何其他模式的建议，以适应这种流动？或至少知道问题的根源。对我来说这看起来很奇怪，因为我为每个正在运行的测试使用相同的文件示例。如果发生此异常，我需要应用程序继续运行以处理下一个文件。感谢
答案 0 :(得分：1)
com.epam.parso.impl.SasFileParser - Column format: $
2016-06-29 09:47:05 44592 [executor-31] DEBUG com.epam.parso.impl.SasFileParser - Subheader process function name: FORMAT_AND_LABEL_SUBHEADER_INDEX
这是您的代码和您自己的问题。我担心在没有任何其他背景的情况下我们无法帮助你。
问题如：
Error creating bean with name 'errorChannel': Singleton bean creation not allowed while the singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)
表示您有一些意外的destroy()电话会导致即时流程以不良方式完成。
所以，请重新考虑如何处理流程或整个应用程序。特别是破坏或退出部分。