mayurbm opened a new pull request, #25845:
URL: https://github.com/apache/camel/pull/25845
## Summary
- Wraps `IOException` and `UncheckedIOException` thrown by Apache Commons
CSV during unmarshal with a diagnostic message that identifies the root cause
and guides operators toward a fix.
- Adds a `wrapCsvParseError(IOException)` helper on `CsvUnmarshaller`
(abstract base) called from `BulkCsvUnmarshaller` catch blocks.
- Adds `CsvUnmarshalErrorMessageTest` with 3 tests covering:
encapsulated-token error message content, original cause preserved, and valid
CSV passes through unchanged.
**Before:**
```
java.io.IOException: (line 1) invalid char between encapsulated token and
delimiter
```
**After:**
```
CSV parse failed: (line 1) invalid char between encapsulated token and
delimiter.
A quoted field has extra characters after the closing quote and before the
delimiter
(example: "abc"x,def). Check delimiter, quote character, and escaped quotes
("").
```
This is a cosmetic/diagnostic-only change — bad CSV still fails, it just
fails with a clearer message. No behavior, API, or data format change.
Fixes: https://issues.apache.org/jira/browse/CAMEL-24546
_Claude Code on behalf of mayurbm_
## Test plan
- [ ] `mvn test -pl components/camel-csv` passes (96 tests, 0 failures)
- [ ] `CsvUnmarshalErrorMessageTest` — 3 new tests all green
- [ ] No regression in existing CSV marshal/unmarshal tests
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