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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5481) Namenode returns lease recovery requests with other requests
Date Thu, 12 Mar 2009 20:56:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681486#action_12681486
] 

Kan Zhang commented on HADOOP-5481:
-----------------------------------

{noformat}
        //check lease recovery
        cmd = nodeinfo.getLeaseRecoveryCommand(Integer.MAX_VALUE);
        if (cmd != null) {
          return new DatanodeCommand[] {cmd};
        }

        ArrayList<DatanodeCommand> cmds = new ArrayList<DatanodeCommand>(2);
        //check pending replication
        cmd = nodeinfo.getReplicationCommand(
              maxReplicationStreams - xmitsInProgress);
        if (cmd != null) {
          cmds.add(cmd);
        }
        //check block invalidation
        cmd = nodeinfo.getInvalidateBlocks(blockInvalidateLimit);
        if (cmd != null) {
          cmds.add(cmd);
        }
{noformat}


> Namenode returns lease recovery requests with other requests
> ------------------------------------------------------------
>
>                 Key: HADOOP-5481
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5481
>             Project: Hadoop Core
>          Issue Type: Improvement
>            Reporter: Kan Zhang
>            Assignee: Kan Zhang
>
> HADOOP-5034 modified NN to return both replication and deletion requests to DN in one
reply to a heartbeat. However, the lease recovery request is still sent separately by itself.
Is there a reason for this? If not, I suggest we combine them together. This will make it
less confusing when adding new types of requests, which are combinable as well.

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