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https://issues.apache.org/jira/browse/HDDS-16721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-16721:
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Labels: pull-request-available (was: )
> StreamBlockInputStream.read() returns a negative value for bytes 0x80 to 0xFF
> -----------------------------------------------------------------------------
>
> Key: HDDS-16721
> URL: https://issues.apache.org/jira/browse/HDDS-16721
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Client
> Reporter: Chu Cheng Li
> Assignee: Chu Cheng Li
> Priority: Major
> Labels: pull-request-available
>
> *Problem*
> {{StreamBlockInputStream.read()}} returns the value from
> {{readBuffer.getByteBuffer().get()}}. It does not change this signed byte to
> an unsigned value. Thus:
> * A byte from 0x80 to 0xFE gives a negative value.
> * The byte 0xFF gives -1. For a caller, -1 means the end of the stream.
> {{InputStream.read()}} must return a value from 0 to 255, or -1 at the end of
> the stream.
> *Effect*
> The problem occurs in the streaming read
> ({{ozone.client.stream.readblock.enable}}) when a caller reads one byte at a
> time. {{KeyInputStream}} reads into a {{ByteBuffer}}. Thus, most reads do not
> have this problem.
> *Fix*
> * Change {{read()}} to return {{Byte.toUnsignedInt(...)}}.
> * Add a test that reads the byte 0xFF.
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