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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8929) Add a metric to expose the timestamp of the last journal
Date Tue, 08 Sep 2015 21:46:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14735680#comment-14735680
] 

Hadoop QA commented on HDFS-8929:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  22m 18s | Pre-patch trunk compilation is healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags.
|
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 1 new
or modified test files. |
| {color:green}+1{color} | javac |   7m 46s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |   9m 58s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | site |   3m  1s | Site still builds. |
| {color:green}+1{color} | checkstyle |   2m 25s | There were no new checkstyle issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | install |   1m 28s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   4m 19s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | common tests |  22m 58s | Tests passed in hadoop-common. |
| {color:red}-1{color} | hdfs tests | 162m 36s | Tests failed in hadoop-hdfs. |
| | | 237m 49s | |
\\
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|| Reason || Tests ||
| Timed out tests | org.apache.hadoop.hdfs.server.datanode.TestFsDatasetCacheRevocation |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12754679/HDFS-8929-004.patch
|
| Optional Tests | site javadoc javac unit findbugs checkstyle |
| git revision | trunk / 970daaa |
| hadoop-common test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12342/artifact/patchprocess/testrun_hadoop-common.txt
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12342/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12342/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf902.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep
3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/12342/console |


This message was automatically generated.

> Add a metric to expose the timestamp of the last journal
> --------------------------------------------------------
>
>                 Key: HDFS-8929
>                 URL: https://issues.apache.org/jira/browse/HDFS-8929
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: journal-node
>            Reporter: Akira AJISAKA
>            Assignee: Surendra Singh Lilhore
>         Attachments: HDFS-8929-001.patch, HDFS-8929-002.patch, HDFS-8929-003.patch, HDFS-8929-004.patch
>
>
> If there are three JNs and only one JN is failing to journal, we can detect it by monitoring
the difference of the last written transaction id among JNs from NN WebUI or JN metrics. However,
it's difficult to define the threshold to alert because the increase rate of the number of
transaction depends on how busy the cluster is. Therefore I'd like to propose a metric to
expose the timestamp of the last journal. That way we can easily alert if a JN is failing
to journal for some fixed period.



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