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From "John George (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2290) Block with corrupt replica is not getting replicated
Date Thu, 22 Sep 2011 14:12:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112606#comment-13112606
] 

John George commented on HDFS-2290:
-----------------------------------

What one of the other tests does is to sleep in a while loop for about 20 times, each time
"sleeping" for a second and checking if it got the expected results. This way, the test was
not sleeping for more time than necessary. If there is a better way, I am all ears as well...
{code}
+      while (tries++ < 20) {
+        try {
+          Thread.sleep(1000);
+          if (checkFile(fileSys, file1, replicas, null, numDatanodes) == null) {
+            break;
+          }
+        } catch (InterruptedException ie) {
+        }
+      }
+      cleanupFile(fileSys, file1);
+      assertTrue("Checked if node was recommissioned " + tries + " times.",
+         tries < 20);
{code}

> Block with corrupt replica is not getting replicated
> ----------------------------------------------------
>
>                 Key: HDFS-2290
>                 URL: https://issues.apache.org/jira/browse/HDFS-2290
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Benoy Antony
>              Labels: blockmanagement, replication
>             Fix For: 0.22.0
>
>         Attachments: HDFS-2290_0.22.patch, HDFS-2290_022.patch, HDFS-2290_022.patch,
HDFS-2290_trunk.patch
>
>
> A block has one replica marked as corrupt and two good ones. countNodes() correctly detects
that there are only 2 live replicas, and fsck reports the block as under-replicated. But ReplicationMonitor
never schedules replication of good replicas.

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