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Kan Zhang commented on HDFS-265: -------------------------------- > Regarding Kan's comment, I believe the new design should work well with the > access token expiration problem if a new access token is returned along with > a new generation stamp. This is not sufficient. My point was whenever a new pipeline needs to be set up, the client needs to call the block recovery code to get a newly generated access token, even in cases where a new generation stamp is not needed. > Revisit append > -------------- > > Key: HDFS-265 > URL: https://issues.apache.org/jira/browse/HDFS-265 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Hairong Kuang > Assignee: Hairong Kuang > Attachments: appendDesign.pdf, appendDesign.pdf, appendDesign1.pdf, > AppendSpec.pdf, TestPlanAppend.html > > > HADOOP-1700 and related issues have put a lot of efforts to provide the first > implementation of append. However, append is such a complex feature. It turns > out that there are issues that were initially seemed trivial but needs a > careful design. This jira revisits append, aiming for a design and > implementation supporting a semantics that are acceptable to its users. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.