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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5016) Deadlock in pipeline recovery causes Datanode to be marked dead
Date Fri, 26 Jul 2013 05:59:50 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Suresh Srinivas updated HDFS-5016:
----------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

I committed the patch to trunk, branch-2 and branch-2.1. Thank you Devaraj for reporting the
issue. Thank you Andrew for the review.
                
> Deadlock in pipeline recovery causes Datanode to be marked dead
> ---------------------------------------------------------------
>
>                 Key: HDFS-5016
>                 URL: https://issues.apache.org/jira/browse/HDFS-5016
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Suresh Srinivas
>            Priority: Blocker
>             Fix For: 2.1.0-beta
>
>         Attachments: HDFS-5016.1.patch, HDFS-5016.2.patch, HDFS-5016.3.patch, HDFS-5016.patch,
jstack1.txt
>
>
> In the testing of some failure scenarios for HBase MTTR, we have been simulating node
failures via firewalling of nodes (where all communication ports would be firewalled except
ssh's port). We have noticed that when a (data)node is firewalled, we lose certain other datanodes
- those that were involved in some communication with the firewalled node before the latter
was firewalled. Will attach jstack output from one of the lost datanodes. The heartbeating
thread seems to be locked up.
> This jira is to track a fix for the problem.

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