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Posted to hdfs-issues@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2012/10/16 00:59:03 UTC
[jira] [Created] (HDFS-4059) Add number of stale DataNodes to
metrics
Jing Zhao created HDFS-4059:
-------------------------------
Summary: Add number of stale DataNodes to metrics
Key: HDFS-4059
URL: https://issues.apache.org/jira/browse/HDFS-4059
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: 3.0.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Minor
Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hadoop QA (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13476781#comment-13476781 ]
Hadoop QA commented on HDFS-4059:
---------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12549229/HDFS-4059.trunk.001.patch
against trunk revision .
{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}. The javadoc tool did not generate any 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 1.3.9) 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-hdfs-project/hadoop-hdfs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3341//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3341//console
This message is automatically generated.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Updated] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Jing Zhao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao updated HDFS-4059:
----------------------------
Attachment: HDFS-4059.trunk.002.patch
Thanks for the comments Suresh! The testStaleNodes testcase now explicitly calls the heartbeatCheck method through a new method in BlockManagerTestUtil, so that we can remove the Thread.sleep().
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Suresh Srinivas (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477288#comment-13477288 ]
Suresh Srinivas commented on HDFS-4059:
---------------------------------------
We should probably make this change in branch-1 as well.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477285#comment-13477285 ]
Hudson commented on HDFS-4059:
------------------------------
Integrated in Hadoop-trunk-Commit #2873 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/2873/])
HDFS-4059. Add number of stale DataNodes to metrics. Contributed by Jing Zhao. (Revision 1398949)
Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1398949
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Updated] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Suresh Srinivas (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Suresh Srinivas updated HDFS-4059:
----------------------------------
Resolution: Fixed
Fix Version/s: (was: 1.1.0)
Release Note:
This jira adds a new metric with name "StaleDataNodes" under metrics context "dfs" of type Gauge. This tracks the number of DataNodes marked as stale. A DataNode is marked stale when the heartbeat message from the DataNode is not received within the configured time ""dfs.namenode.stale.datanode.interval".
Please see hdfs-default.xml documentation corresponding to ""dfs.namenode.stale.datanode.interval" for more details on how to configure this feature. When this feature is not configured, this metrics would return zero.
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
I committed the patch to branch-2 and trunk. Thank you Jing.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477839#comment-13477839 ]
Hudson commented on HDFS-4059:
------------------------------
Integrated in Hadoop-Hdfs-trunk #1198 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1198/])
HDFS-4059. Add number of stale DataNodes to metrics. Contributed by Jing Zhao. (Revision 1398949)
Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1398949
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Suresh Srinivas (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13476736#comment-13476736 ]
Suresh Srinivas commented on HDFS-4059:
---------------------------------------
Comment:
# Can you please add name and descrption to the metric, some thing like - {{@Metric({"StaleDataNodes", "Number of datanodes marked stale due to delayed heartbeat"}}}. Without this metric name is derived from the method name and will have not descrption.
# Can the test be changed to not wait that long. Also can you avoid dependency on timing by using a loop to wait for metric to reach the value?
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hadoop QA (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477268#comment-13477268 ]
Hadoop QA commented on HDFS-4059:
---------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12549344/HDFS-4059.trunk.002.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author tags.
{color:green}+1 tests included{color}. The patch appears to include 2 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}. The javadoc tool did not generate any 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 1.3.9) 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-hdfs-project/hadoop-hdfs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3344//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3344//console
This message is automatically generated.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477868#comment-13477868 ]
Hudson commented on HDFS-4059:
------------------------------
Integrated in Hadoop-Mapreduce-trunk #1228 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1228/])
HDFS-4059. Add number of stale DataNodes to metrics. Contributed by Jing Zhao. (Revision 1398949)
Result = FAILURE
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1398949
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Updated] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Suresh Srinivas (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Suresh Srinivas updated HDFS-4059:
----------------------------------
Status: Patch Available (was: Open)
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Updated] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Jing Zhao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao updated HDFS-4059:
----------------------------
Attachment: HDFS-4059.trunk.003.patch
Updated based on Suresh's comments.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Updated] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Jing Zhao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao updated HDFS-4059:
----------------------------
Attachment: HDFS-4059.trunk.001.patch
The patch includes a new testcase (testStaleNodes) for TestNameNodeMetrics. But on my local test TestNameNodeMetrics#testCorruptBlock may still fail. After applying the patch in HDFS-2434 my local test works fine.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Suresh Srinivas (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477202#comment-13477202 ]
Suresh Srinivas commented on HDFS-4059:
---------------------------------------
Calling metrics "StaleDataNodes" is better than "NumStaleDataNodes".
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 1.1.0, 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Jing Zhao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13478076#comment-13478076 ]
Jing Zhao commented on HDFS-4059:
---------------------------------
I backport the patch to branch-1. Since the code is different, I will create another jira for that.
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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[jira] [Commented] (HDFS-4059) Add number of stale DataNodes to
metrics
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477770#comment-13477770 ]
Hudson commented on HDFS-4059:
------------------------------
Integrated in Hadoop-Yarn-trunk #6 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/6/])
HDFS-4059. Add number of stale DataNodes to metrics. Contributed by Jing Zhao. (Revision 1398949)
Result = FAILURE
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1398949
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/metrics/FSNamesystemMBean.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
> Add number of stale DataNodes to metrics
> ----------------------------------------
>
> Key: HDFS-4059
> URL: https://issues.apache.org/jira/browse/HDFS-4059
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: HDFS-4059.trunk.001.patch, HDFS-4059.trunk.002.patch, HDFS-4059.trunk.003.patch
>
>
> Add the number of stale DataNodes to metrics.
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