[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969441#action_12969441 ] Doug Cutting commented on HADOOP-6904: -- > Can we use a hash of client side and server

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969417#action_12969417 ] Sanjay Radia commented on HADOOP-6904: -- Looks like we are getting closure. Only thing

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969259#action_12969259 ] dhruba borthakur commented on HADOOP-6904: -- >Dhruba, did you buy the use of the M

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969161#action_12969161 ] Hairong Kuang commented on HADOOP-6904: --- > The client side does not know what is new

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969155#action_12969155 ] Sanjay Radia commented on HADOOP-6904: -- The client side does not know what is *newly*

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968836#action_12968836 ] Hairong Kuang commented on HADOOP-6904: --- > we have to do it for each call. I meant f

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968784#action_12968784 ] Hairong Kuang commented on HADOOP-6904: --- > Exactly when will the method names be con

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968442#action_12968442 ] Sanjay Radia commented on HADOOP-6904: -- > ... addition of an all-new method name

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968441#action_12968441 ] Sanjay Radia commented on HADOOP-6904: -- Normally the deletion of a method is consider

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968363#action_12968363 ] Doug Cutting commented on HADOOP-6904: -- > Major number changes when you delete a meth

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966768#action_12966768 ] Sanjay Radia commented on HADOOP-6904: -- > .. But adding or removing a method would no

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966594#action_12966594 ] Hairong Kuang commented on HADOOP-6904: --- Doug, yes you are right. Using hash may not

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966588#action_12966588 ] Doug Cutting commented on HADOOP-6904: -- Hairong> Major numbers should be updated if w

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966453#action_12966453 ] Hairong Kuang commented on HADOOP-6904: --- Major numbers should be updated if we chang

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966337#action_12966337 ] Doug Cutting commented on HADOOP-6904: -- If we have method names, why would major numb

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965791#action_12965791 ] Hairong Kuang commented on HADOOP-6904: --- GetProtocolVersion will be sure to send maj

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965671#action_12965671 ] dhruba borthakur commented on HADOOP-6904: -- > The real difference is the followin

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965354#action_12965354 ] Sanjay Radia commented on HADOOP-6904: -- @Dhruba >major/minor numbers can be considere

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965304#action_12965304 ] Hairong Kuang commented on HADOOP-6904: --- If we assume that each rpc has a distinct n

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965076#action_12965076 ] dhruba borthakur commented on HADOOP-6904: -- > Returning methods that supported at

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965075#action_12965075 ] Sanjay Radia commented on HADOOP-6904: -- This patch looks fine. Please update HDFS-133

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965074#action_12965074 ] Sanjay Radia commented on HADOOP-6904: -- @doug > .. protocol introspection on the clie

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12964949#action_12964949 ] Doug Cutting commented on HADOOP-6904: -- Hairong, the latest patch seems like it could

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935440#action_12935440 ] Sanjay Radia commented on HADOOP-6904: -- On further thought, the Major-minor removes m

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935211#action_12935211 ] Sanjay Radia commented on HADOOP-6904: -- Hairong, to summarize our discussion today: G

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930230#action_12930230 ] Sanjay Radia commented on HADOOP-6904: -- >But for the trunk we've already had so many

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928337#action_12928337 ] Hairong Kuang commented on HADOOP-6904: --- Yes, I agree that with some efforts we can

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928287#action_12928287 ] Sanjay Radia commented on HADOOP-6904: -- > Would we be able to use the major and minor

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898479#action_12898479 ] Hairong Kuang commented on HADOOP-6904: --- > Would we be able to use the major and min

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898474#action_12898474 ] Sanjay Radia commented on HADOOP-6904: -- >Yes, it is going to be a hard coded compatib

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898472#action_12898472 ] Sanjay Radia commented on HADOOP-6904: -- > But the new client will get the "now such m

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898434#action_12898434 ] Hairong Kuang commented on HADOOP-6904: --- > Slight improvement to your design: > If a

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898418#action_12898418 ] Hairong Kuang commented on HADOOP-6904: --- > But the new client will get the "now such

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898416#action_12898416 ] Sanjay Radia commented on HADOOP-6904: -- >If we do not bump the version number, old cl

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898414#action_12898414 ] Sanjay Radia commented on HADOOP-6904: -- Slight improvement to your design: If a new s

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898413#action_12898413 ] Hairong Kuang commented on HADOOP-6904: --- This framework supports both backward & for

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898411#action_12898411 ] Hairong Kuang commented on HADOOP-6904: --- Yes, Sanjay, you got the idea! I am happy t

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898410#action_12898410 ] Hairong Kuang commented on HADOOP-6904: --- As a practice, I rewrote HDFS-946, improve

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898407#action_12898407 ] Sanjay Radia commented on HADOOP-6904: -- Sorry I hit by mistake. For example will be

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898402#action_12898402 ] Sanjay Radia commented on HADOOP-6904: -- >Could you provide a few examples of compatib

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898347#action_12898347 ] Doug Cutting commented on HADOOP-6904: -- I'll repeat here my comments from HDFS-1335:

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898324#action_12898324 ] Hairong Kuang commented on HADOOP-6904: --- Erik, I believe that there are many solutio

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897971#action_12897971 ] Erik Steffl commented on HADOOP-6904: - Was it ever considered to take the capabilities

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897081#action_12897081 ] Hairong Kuang commented on HADOOP-6904: --- Doug, now that the patch to HDFS-1335 is ou

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896656#action_12896656 ] Doug Cutting commented on HADOOP-6904: -- I'd like to have a better understanding of ho

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896389#action_12896389 ] Hairong Kuang commented on HADOOP-6904: --- Hudson is stuck. I ran tests on my local bo

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896178#action_12896178 ] Doug Cutting commented on HADOOP-6904: -- I think the long-term plan is to try to avoid

[jira] Commented: (HADOOP-6904) A baby step towards inter-version communications between dfs client and NameNode

[ https://issues.apache.org/jira/browse/HADOOP-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896167#action_12896167 ] Hairong Kuang commented on HADOOP-6904: --- Looks that all the changes I need to make i