[jira] [Resolved] (OAK-956) SegmentStream doesn't implement the method available()

["Jukka Zitting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting resolved OAK-956.
-------------------------------

    Resolution: Duplicate

Resolving as a duplicate of OAK-1188 where we already handled this case.

Alex, you're misunderstanding how BIS works. It *doesn't* guarantee that {{read()}} always returns the requested number of bytes. See the [BIS.read(...) javadocs|http://docs.oracle.com/javase/7/docs/api/java/io/BufferedInputStream.html#read(byte%5B%5D%2C%20int%2C%20int)]:

{quote}
 As an additional convenience, it attempts to read as many bytes as possible by repeatedly invoking the read method of the underlying stream. This iterated read continues until one of the following conditions becomes true:

* The specified number of bytes have been read,
* The read method of the underlying stream returns -1, indicating end-of-file, or
* The available method of the underlying stream returns zero, indicating that further input requests would block.
{quote}

In other words, it *does not guarantee* that the requested number of bytes is read fully. Only that it does so in case the underlying stream reports through {{available()}} that this can be done without blocking.

> SegmentStream doesn't implement the method available()
> ------------------------------------------------------
>
>                 Key: OAK-956
>                 URL: https://issues.apache.org/jira/browse/OAK-956
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core
>            Reporter: Antonio Sanso
>
>  org.apache.jackrabbit.oak.plugins.segment.SegmentStream doesn't implement the method available()
> {code}
> Value.getStream().available()
> {code}
> will always return 0



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