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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6578) add toString method to DatanodeStorage etc for easier debugging
Date Sat, 21 Jun 2014 19:27:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14039930#comment-14039930
] 

Arpit Agarwal commented on HDFS-6578:
-------------------------------------

Hi [~yzhangal],

bq. _BlockManager.processReport accumulates information of prior calls_
processReport does not accumulate results. We can just say _The result of the last BlockManager.processReport
call is accurate_?

> add toString method to DatanodeStorage etc for easier debugging
> ---------------------------------------------------------------
>
>                 Key: HDFS-6578
>                 URL: https://issues.apache.org/jira/browse/HDFS-6578
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Yongjun Zhang
>            Assignee: Yongjun Zhang
>         Attachments: HDFS-6578.001.patch
>
>
> It seems to be nice to add a toString() method for DatanodeStorage class, so we can print
out its key info easier while doing debuging.
> Another thing is, in the end of BlockManager#processReport, there is the following message,
> {code}
>    blockLog.info("BLOCK* processReport: from storage " + storage.getStorageID()
>         + " node " + nodeID + ", blocks: " + newReport.getNumberOfBlocks()
>         + ", processing time: " + (endTime - startTime) + " msecs");
>     return !node.hasStaleStorages();
> {code}
> We could add node.hasStaleStorages() to the log, and possibly replace storage.getSorateID()
with the suggested storage.toString().
> Any comments? thanks.



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