[jira] [Resolved] (CAMEL-24563) camel-file: add diagnostic WARN log in GenericFileConverter when RemoteFile body is null

["Claus Ibsen (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-24563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claus Ibsen resolved CAMEL-24563.
---------------------------------
    Resolution: Won't Fix

> camel-file: add diagnostic WARN log in GenericFileConverter when RemoteFile body is null
> ----------------------------------------------------------------------------------------
>
>                 Key: CAMEL-24563
>                 URL: https://issues.apache.org/jira/browse/CAMEL-24563
>             Project: Camel
>          Issue Type: Improvement
>          Components: camel-ftp
>            Reporter: mayur mohan
>            Priority: Minor
>
> When a RemoteFile consumer processes a file and stream caching is enabled, the type converter attempts to convert RemoteFile -> StreamCache via GenericFileConverter. If the RemoteFile body has not been loaded (null), the conversion silently returns null with no diagnostic information, making it impossible for operators to understand why stream caching was skipped.
> *Stack trace (Camel 3.14.x where this caused NPE):*
> {noformat}
> org.apache.camel.StreamCacheException: Error during type conversion from type:
>   org.apache.camel.component.file.remote.RemoteFile to the required type: org.apache.camel.StreamCache
>   with value RemoteFile[CPP_B2BUnits_196498_20260829_094325.xml]
>   due to TypeConversionException: ... due to java.lang.NullPointerException: null
>     at CamelInternalProcessor$StreamCachingAdvice.before
>     at GenericFileConsumer.processExchange
> Caused by: java.lang.NullPointerException
> {noformat}
> *Root cause:* GenericFile.getBody() returns null when the remote file content was not retrieved before stream caching attempted. In Camel 4, this no longer throws NPE (the null guard was added), but the conversion still silently returns null without any log message, leaving operators with no diagnostic information.
> *Fix:* Add a WARN log in GenericFileConverter.convertTo() when the file body is null, including the filename and guidance on how to fix the configuration (localWorkDirectory, streamDownload).
> This is a diagnostic/observability improvement — not a behavior change.



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