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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1467) Append pipeline never succeeds with more than one replica
Date Tue, 16 Nov 2010 07:16:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932358#action_12932358
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Konstantin Shvachko commented on HDFS-1467:
-------------------------------------------

I don't quite understand what is wrong. I see we pass the old block and the newGs to
{{datanode.data.append(block, newGs, minBytesRcvd);}}
only after that we set newGs to the old block. Looks good to me so far.

> we can never successfully construct a pipeline for append with more than one datanode
in it!

I can testify this had been tested. Can we try to trace it back - not to blame anybody, but
to restate the historical events.
May be Hairong can shed some light onto it.

> Append pipeline never succeeds with more than one replica
> ---------------------------------------------------------
>
>                 Key: HDFS-1467
>                 URL: https://issues.apache.org/jira/browse/HDFS-1467
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Blocker
>         Attachments: failed-TestPipelines.txt, hdfs-1467.txt
>
>
> TestPipelines appears to be failing on trunk:
> Should be RBW replica after sequence of calls append()/write()/hflush() expected:<RBW>
but was:<FINALIZED>
> junit.framework.AssertionFailedError: Should be RBW replica after sequence of calls append()/write()/hflush()
expected:<RBW> but was:<FINALIZED>
>         at org.apache.hadoop.hdfs.TestPipelines.pipeline_01(TestPipelines.java:109)

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