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https://issues.apache.org/jira/browse/HADOOP-5724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suresh Srinivas updated HADOOP-5724:
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Attachment: blockdel-2.patch
New patch with suggested changes. Also I understood your comment about checking
for null for BlockInfo and have added the check.
Patch passes all the unit tests except TestJobHistory (tracked in HADOOP-5920).
No new tests are added as the existing ones test the functionality already.
Here is the test-patch result:
{noformat}
[exec] -1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] -1 tests included. The patch doesn't appear to include any new
or modified tests.
[exec] Please justify why no tests are needed for
this patch.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 Eclipse classpath. The patch retains Eclipse classpath
integrity.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
{noformat}
> Datanode should report deletion of blocks to Namenode explicitly
> ----------------------------------------------------------------
>
> Key: HADOOP-5724
> URL: https://issues.apache.org/jira/browse/HADOOP-5724
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Fix For: 0.21.0
>
> Attachments: blockdel-1.patch, blockdel-2.patch, blockdel.patch,
> blockdel.patch
>
>
> Currently datanode notifies namenode newly added blocks and the blocks that
> are corrupt. There is no explicit message from the datanode to the namenode
> to indicate the deletion of blocks. Block reports from the datanode is the
> only way for the namenode to learn about the deletion of blocks at a
> datanode. With the addition of explicit request to indicate to block
> deletion, block report interval (which is currently 1 hour) can be increased
> to a longer duration. This reduces load on both namenode and datanodes.
>
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