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Hudson commented on HDFS-673:
-----------------------------
Integrated in Hdfs-Patch-h2.grid.sp2.yahoo.net #47 (See [http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h2.grid.sp2.yahoo.net/47/])
> BlockReceiver#PacketResponder should not remove a packet from the ack queue before its
ack is sent
> --------------------------------------------------------------------------------------------------
>
> Key: HDFS-673
> URL: https://issues.apache.org/jira/browse/HDFS-673
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: pkgRmOrder.patch
>
>
> After a BlockReceiver finish receiving the last packet of a block, it waits until the
ack queue becomes empty. It them assumes that all acks have been sent and shunts down network
connections. The current code removes a packet from the ack queue before its ack is sent.
So there is a chance that the connection gets closed before an ack is sent.
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