davsclaus commented on code in PR #28255:
URL: https://github.com/apache/camel/pull/28255#discussion_r4344925696


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components/camel-file/src/main/java/org/apache/camel/component/file/GenericFileKeptDoneFiles.java:
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@@ -59,8 +61,6 @@ synchronized List<String> startBatch(Set<String> 
listedDoneFiles, boolean listin
                 }
             }
             kept.clear();

Review Comment:
   Not blocking, older than this PR: this path has the same kind of window. 
When the listing is complete, `kept.clear()` drops the done file here. The done 
files of the files this poll leaves are kept again only later: in `poll()` for 
the non-eager `maxMessagesPerPoll` cut (after the exchanges are created and 
sorted), and in `processBatch` for files that are not started or are left when 
the batch stops. If the last file of the previous poll completes asynchronously 
in between (for example the route hands off to `threads()` or `seda`), 
`GenericFileOnCompletion.handleDoneFile` sees the done file as not kept and 
deletes it. The files this poll then leaves have no done file. The window is 
longer than the one this PR removes, but it needs an async route. Worth a 
follow-up JIRA rather than more changes here.



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