I haven't analyzed your failure in detail, but this smells like
another instance of
https://github.com/apache/maven-javadoc-plugin/issues/1241 which is
fixed at HEAD.

On Fri, Aug 29, 2025 at 8:30 PM Gary D. Gregory <ggreg...@apache.org> wrote:
>
> Hi All,
>
> A MalformedInputException started happening today when we updated our parent 
> pom in Command Lang which includes updating the Javadoc plugin from 3.11.2 to 
> 3.11.3. Do you think this failure is related to 
> https://stackoverflow.com/questions/53449049/maven-javadoc-plugin-error-javadoc-error-cannot-read-input-length-1-with-no
>  and 
> https://github.com/apache/maven-javadoc-plugin/blob/3dcf135299950db9541f7da671bec1a84c5cef49/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java#L4373?
>
> <...>
> Caused by: java.nio.charset.MalformedInputException: Input length = 1
>     at java.nio.charset.CoderResult.throwException (CoderResult.java:281)
>     at sun.nio.cs.StreamDecoder.implRead (StreamDecoder.java:339)
>     at sun.nio.cs.StreamDecoder.read (StreamDecoder.java:178)
>     at java.io.InputStreamReader.read (InputStreamReader.java:184)
>     at java.io.BufferedReader.fill (BufferedReader.java:161)
>     at java.io.BufferedReader.readLine (BufferedReader.java:324)
>     at java.io.BufferedReader.readLine (BufferedReader.java:389)
>     at java.io.BufferedReader$1.hasNext (BufferedReader.java:571)
>     at java.util.Iterator.forEachRemaining (Iterator.java:115)
>     at java.util.Spliterators$IteratorSpliterator.forEachRemaining 
> (Spliterators.java:1801)
>     at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:482)
>     at java.util.stream.AbstractPipeline.wrapAndCopyInto 
> (AbstractPipeline.java:472)
>     at java.util.stream.ReduceOps$ReduceOp.evaluateSequential 
> (ReduceOps.java:708)
>     at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
>     at java.util.stream.ReferencePipeline.collect (ReferencePipeline.java:566)
>     at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.isUpToDate 
> (AbstractJavadocMojo.java:5010)
>
> From:
>
> https://github.com/apache/commons-lang/actions/runs/17325932362/job/49213011492
>
> The output for the above is copied to 
> https://gist.github.com/garydgregory/1652fd57c1481b6090c48a8229e8cc65
>
> TY,
> Gary
>
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-- 
Elliotte Rusty Harold
elh...@ibiblio.org

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