[ https://issues.apache.org/jira/browse/HDFS-1346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900105#action_12900105
]
sam rash commented on HDFS-1346:
--------------------------------
not easily--PacketResponder is a non-static inner class. Constructing a BlockReceiver requires
a Datanode instance.
If you can harness a Datanode, then you need to stub out the DataInputStream and figure out
when to fire a callback (somehow when ack.readFields() reads from the DatainputStream, but
not before).
I think it's possible, but we haven't had time yet
> DFSClient receives out of order packet ack
> ------------------------------------------
>
> Key: HDFS-1346
> URL: https://issues.apache.org/jira/browse/HDFS-1346
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node, hdfs client
> Affects Versions: 0.20-append
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.20-append
>
> Attachments: outOfOrder.patch
>
>
> When running 0.20 patched with HDFS-101, we sometimes see an error as follow:
> WARN hdfs.DFSClient: DFSOutputStream ResponseProcessor exception for block blk_-2871223654872350746_21421120java.io.IOException:
Responseprocessor: Expecting seq
> no for block blk_-2871223654872350746_21421120 10280 but received 10281
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$ResponseProcessor.run(DFSClient.java:2570)
> This indicates that DFS client expects an ack for packet N, but receives an ack for packet
N+1.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
|