FAQ
Hftp file read should retry a different datanode if the chosen best datanode fails to connect to NameNode
---------------------------------------------------------------------------------------------------------

Key: HDFS-1553
URL: https://issues.apache.org/jira/browse/HDFS-1553
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Reporter: Hairong Kuang
Fix For: 0.23.0


Currently when reading a file through HftpFileSystem interface, namenode deterministically selects the "best" datanode from which the file is read. But this can cause the read to fail if the best datanode fails to connect to namenode because it never tries another datanode.

The proposed solution is to send a list of datanode candidates when namenode redirects the read request to the chosen best datanode. The the datanode could redirect the request to the next good datanode when it fails to connect to namenode.

--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

Search Discussions

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
grouphdfs-dev @
categorieshadoop
postedDec 22, '10 at 10:51p
activeDec 22, '10 at 10:51p
posts1
users1
websitehadoop.apache.org...
irc#hadoop

1 user in discussion

Hairong Kuang (JIRA): 1 post

People

Translate

site design / logo © 2022 Grokbase