Claus Ibsen created CAMEL-25792:
-----------------------------------
Summary: camel-file - poll and pollEnrich evaluate a fileName that
does not use the file functions on the current exchange, so ${body} works
Key: CAMEL-25792
URL: https://issues.apache.org/jira/browse/CAMEL-25792
Project: Camel
Issue Type: Bug
Components: camel-ftp, camel-file
Reporter: Claus Ibsen
Assignee: Claus Ibsen
Fix For: 4.24.0
poll and pollEnrich with a file based endpoint evaluate the {{fileName}} option
for each file they find, on an exchange whose body is that file. So
{{fileName=${body[customer]}.json}} or {{fileName=${body}}} does not read the
incoming message, which is what people write and what the docs promise
("dynamic uris computed based on information from the current Exchange").
What happens today:
# Since CAMEL-21733 (4.11) poll and pollEnrich reuse endpoints:
{{GenericFilePollDynamicAware}} keeps {{fileName}} unevaluated in one static
endpoint uri.
# The consumer evaluates {{fileName}} in {{GenericFileConsumer.isMatched}} for
each file it finds, on a dummy exchange: the body is the file being checked,
with its {{CamelFile*}} headers, and the headers, variables and exchange
properties of the incoming message copied in.
# So {{${body[customer]}}} reads a {{java.io.File}}: "Key: customer not found
in bean: .../customers/C-482.json of type: java.io.File", for every file on
every poll, until the timeout. A header or a variable works; the body does not.
In a benchmark of Oct 18-19 2026 (a local model building an enrich-and-dedupe
example), the pollEnrich step failed in 8 of 8 runs on this, with 500 to 2,300
such log lines per run.
The fix (decided with Claus, Oct 19): an expression that uses the file
functions ({{${file:...}}}, {{${date:file:...}}}) is about the consumed file,
and is evaluated per file as today; any other expression is evaluated on (a
copy of) the current exchange. Endpoint reuse stays. This covers every file
based component with the poll optimisation: file, ftp, ftps, sftp, smb and
azure-files, which share {{GenericFileConsumer}}.
To note in the upgrade guide: {{${body}}} in the {{fileName}} of poll or
pollEnrich is now the incoming body, not the file.
_Claude Code on behalf of davsclaus_
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
