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https://issues.apache.org/jira/browse/HADOOP-10131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14141897#comment-14141897
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Hadoop QA commented on HADOOP-10131:
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{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12670196/HADOOP-10131-002.patch
against trunk revision f85cc14.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/4782//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/4782//console
This message is automatically generated.
> NetWorkTopology#countNumOfAvailableNodes() is returning wrong value if
> excluded nodes passed are not part of the cluster tree
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-10131
> URL: https://issues.apache.org/jira/browse/HADOOP-10131
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.0.5-alpha
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
> Attachments: HADOOP-10131-002.patch, HADOOP-10131.patch,
> HDFS-5112.patch
>
>
> I got "File /hdfs_COPYING_ could only be replicated to 0 nodes instead of
> minReplication (=1). There are 1 datanode(s) running and 1 node(s) are
> excluded in this operation." in the following case
> 1. 2 DNs cluster,
> 2. One of the datanodes was not responding from last 10 min, but about to
> detect as dead at NN.
> 3. Tried to write one file, for the block NN allocated both DNs.
> 4. Client While creating the pipeline took some time to detect one node
> failure.
> 5. Before client detects pipeline failure, NN side dead node was removed from
> cluster map.
> 6. Now, client has abandoned previous block and asked for new block with dead
> node in excluded list and got above exception even though one more node was
> available live.
> When I dig this more, found that,
> {{NetWorkTopology#countNumOfAvailableNodes()}} is not giving correct count
> when the excludeNodes passed from client are not part of the cluster map.
> Adding to this one more case where count is wrong.
> 1. If there is no node present for the normalized scope in cluster.
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