我正在使用documents4j将word文档转换为pdf,有时我会遇到异常
2016-03-28 09:29:16.982 INFO 3660 --- [pool-1-thread-2] c.d.c.msoffice.MicrosoftWordBridge : Requested conversion from C:\conversion-temp\2b33637b-b74a-4aaa-ac65-a5ebc1eb3efc\temp3 (application/msword) to C:\conversion-temp\2b33637b-b74a-4aaa-ac65-a5ebc1eb3efc\temp4 (application/pdf)
2016-03-28 09:29:17.372 ERROR 3660 --- [http-nio-8080-exec-9] c.s.c.e.mappers.ExceptionMapper : Exception while handling request
com.documents4j.throwables.FileSystemInteractionException: Could not access target file
at com.documents4j.util.Reaction$FileSystemInteractionExceptionBuilder.make(Reaction.java:180) ~[documents4j-util-all-1.0.2.jar:na]
at com.documents4j.util.Reaction$ExceptionalReaction.apply(Reaction.java:75) ~[documents4j-util-all-1.0.2.jar:na]
at com.documents4j.conversion.ExternalConverterScriptResult.resolve(ExternalConverterScriptResult.java:70) ~[documents4j-transformer-api-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.evaluateExitValue(ProcessFutureWrapper.java:48) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.get(ProcessFutureWrapper.java:36) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.get(ProcessFutureWrapper.java:11) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.job.AbstractFutureWrappingPriorityFuture.run(AbstractFutureWrappingPriorityFuture.java:78) ~[documents4j-util-conversion-1.0.2.jar:na]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_74]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_74]
at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_74]
在此异常之后,documents4j 库拒绝任何进一步的请求,但有以下异常
com.documents4j.throwables.ConverterAccessException: The converter seems to be shut down
at com.documents4j.util.Reaction$ConverterAccessExceptionBuilder.make(Reaction.java:117) ~[documents4j-util-all-1.0.2.jar:na]
at com.documents4j.util.Reaction$ExceptionalReaction.apply(Reaction.java:75) ~[documents4j-util-all-1.0.2.jar:na]
at com.documents4j.conversion.ExternalConverterScriptResult.resolve(ExternalConverterScriptResult.java:70) ~[documents4j-transformer-api-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.evaluateExitValue(ProcessFutureWrapper.java:48) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.get(ProcessFutureWrapper.java:36) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.conversion.ProcessFutureWrapper.get(ProcessFutureWrapper.java:11) ~[documents4j-util-transformer-process-1.0.2.jar:na]
at com.documents4j.job.AbstractFutureWrappingPriorityFuture.run(AbstractFutureWrappingPriorityFuture.java:78) ~[documents4j-util-conversion-1.0.2.jar:na]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_74]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_74]
at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_74]
这就是我进行文档转换的方式。
我正在实例化 LocalConverter 的一个实例
LocalConverter.builder().workerPool(corePoolSize, maximumPoolSize, keepAliveTime, TimeUnit.MINUTES).baseFolder(baseFolder).processTimeout(processTimeout, TimeUnit.SECONDS).build();
corePoolSize is 5
maximumPoolSize is 10
keepAliveTime is 3 minutes
processTimeout is 20 minutes
我正在使用这个实例
public File convertFile(MultipartFile file) throws ConversionException {
try(InputStream docStream = file.getInputStream(); ByteArrayOutputStream pdfStream = new ByteArrayOutputStream()) {
boolean status = iConverter.convert(docStream, false).as(DocumentType.DOC).to(pdfStream, false).as(DocumentType.PDF).execute();
if(status) {
// conversion is success, send the response
File response = new File();
//InputStream responseStream = new ByteArrayInputStream(pdfStream.toByteArray());
response.setContentLength(pdfStream.size());
//response.setInputStream(responseStream);
response.setOutputStream(pdfStream);
return response;
} else {
LOGGER.error("Failed to convert word to pdf, conversion status is {}", status);
throw new ConversionException("failed to convert word to pdf");
}
} catch (FileSystemInteractionException fsie) {
LOGGER.error("documents4j file system interaction exception", fsie);
throw new ConversionException("File system exception", fsie);
} catch(IOException ioe) {
throw new ConversionException("Cannot read the input stream of file", ioe);
}
}
这个多部分文件是弹簧多部分文件。我检查了documents4j用于转换的vb脚本,我知道当wordDocument没有正确关闭时会发生这个错误。以下是来自 vb 脚本的片段,它是此错误的来源
' Close the source document.
wordDocument.Close WdDoNotSaveChanges
If Err <> 0 Then
WScript.Quit -3
End If
On Error GoTo 0
我不确定我为什么会得到FileSystemInteractionException
.
我能想到两个假设
- 我正在发送多个同时请求,并且该文件已被其他线程删除
- 我从 MultipartFile 对象获取输入流,并且多部分文件是临时文件,并且根据文档,用户负责将内容复制到持久存储。
如何解决此错误以及此错误的根本原因是什么。