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https://issues.apache.org/jira/browse/FILEUPLOAD-265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17202901#comment-17202901
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Jochen Wiedmann commented on FILEUPLOAD-265:
--------------------------------------------
Okay, quoting from the Bugzilla entry, you mentioned:
{quote}Our (surprising) workaround for now is as follows:. We look at how many
bytes are expected by request.getContentLength() and if what is read does not
match the expected size sleep some milli seconds. We do this in a while loop
which is iterated a maximal number of times or until everything is read.
Normally this solves the problem. So for example for an upload of 230 K, the
inputstream claims done after ~130K, after a few ms wait, another 100K appear
and all works fine.
{quote}
If that claim is true, then there is a problem in Tomcat 9. We simply call
InputStream.read() (as evidenced in the stack trace, quoted in said Bugzilla
entry) and the InputStream contract clearly states:
{quote} This method blocks until input data is available...
{quote}
In other words: We trust in Tomcat to report end-of-file if, and only if, there
is no more data available, not if "there is no more data available now, but
there might be in a few milliseconds".
Sorry, but we're unable to help here. Please, understand that.
> .MultipartStream$MalformedStreamException: Stream ended unexpectedly
> --------------------------------------------------------------------
>
> Key: FILEUPLOAD-265
> URL: https://issues.apache.org/jira/browse/FILEUPLOAD-265
> Project: Commons FileUpload
> Issue Type: Bug
> Affects Versions: 1.3.1
> Environment: httpclient
> Reporter: zhumingu
> Priority: Major
> Labels: Stream, ended, unexpectedly
>
> When uploading files using the browser,it does not happen.But when submission
> using tools with 'multipart/form-data',for example httpclient,advanced rest
> client and so on,
> Only submit a text field, file field is empty, it will report the following
> exception:
> org.apache.commons.fileupload.MultipartStream$MalformedStreamException:
> Stream ended unexpectedly
> at
> org.apache.commons.fileupload.MultipartStream.readHeaders(MultipartStream.java:540)
> at
> org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1038)
> at
> org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:1003)
> at
> org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:310)
> at
> org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:334)
> at
> org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
>
> A simple analysis that, when using the browser, file is not selected, the
> default browser will join the empty data file-part.
> But the use of tools such as httpclient, when the file is empty, it do not
> contain the documents data.
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