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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8277) Safemode enter fails when Standby NameNode is down
Date Thu, 30 Apr 2015 14:17:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14521549#comment-14521549
] 

Hadoop QA commented on HDFS-8277:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  14m 52s | 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} | whitespace |   0m  0s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | javac |   8m 15s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  11m  7s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 25s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   4m 57s | There were no new checkstyle issues. |
| {color:green}+1{color} | install |   1m 56s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 41s | The patch built with eclipse:eclipse.
|
| {color:red}-1{color} | findbugs |   3m 37s | The patch appears to introduce 1 new Findbugs
(version 2.0.3) warnings. |
| {color:green}+1{color} | native |   3m 44s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 166m 39s | Tests failed in hadoop-hdfs. |
| | | 216m 18s | |
\\
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
|  |  Class org.apache.hadoop.hdfs.DataStreamer$LastException is not derived from an Exception,
even though it is named as such  At DataStreamer.java:from an Exception, even though it is
named as such  At DataStreamer.java:[lines 177-201] |
| Failed unit tests | hadoop.hdfs.server.namenode.snapshot.TestSnapshot |
|   | hadoop.hdfs.TestMultiThreadedHflush |
|   | hadoop.hdfs.qjournal.TestSecureNNWithQJM |
|   | hadoop.hdfs.TestQuota |
|   | hadoop.hdfs.TestDFSClientRetries |
|   | hadoop.hdfs.TestFileLengthOnClusterRestart |
|   | hadoop.hdfs.server.namenode.TestDeleteRace |
|   | hadoop.hdfs.TestReplaceDatanodeOnFailure |
|   | hadoop.hdfs.tools.TestDFSAdminWithHA |
|   | hadoop.hdfs.TestClose |
| Timed out tests | org.apache.hadoop.hdfs.TestDataTransferProtocol |
|   | org.apache.hadoop.hdfs.TestClientProtocolForPipelineRecovery |
|   | org.apache.hadoop.hdfs.tools.offlineEditsViewer.TestOfflineEditsViewer |
|   | org.apache.hadoop.hdfs.server.namenode.TestNamenodeRetryCache |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12729456/HDFS-8277_2.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / e89fc53 |
| Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/10476/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/10476/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/10476/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf903.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/10476/console |


This message was automatically generated.

> Safemode enter fails when Standby NameNode is down
> --------------------------------------------------
>
>                 Key: HDFS-8277
>                 URL: https://issues.apache.org/jira/browse/HDFS-8277
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, HDFS, namenode
>    Affects Versions: 2.6.0
>         Environment: HDP 2.2.0
>            Reporter: Hari Sekhon
>            Assignee: surendra singh lilhore
>            Priority: Minor
>         Attachments: HDFS-8277.patch, HDFS-8277_1.patch, HDFS-8277_2.patch
>
>
> HDFS fails to enter safemode when the Standby NameNode is down (eg. due to AMBARI-10536).
> {code}hdfs dfsadmin -safemode enter
> safemode: Call From nn2/x.x.x.x to nn1:8020 failed on connection exception: java.net.ConnectException:
Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused{code}
> This appears to be a bug in that it's not trying both NameNodes like the standard hdfs
client code does, and is instead stopping after getting a connection refused from nn1 which
is down. I verified normal hadoop fs writes and reads via cli did work at this time, using
nn2. I happened to run this command as the hdfs user on nn2 which was the surviving Active
NameNode.
> After I re-bootstrapped the Standby NN to fix it the command worked as expected again.
> Hari Sekhon
> http://www.linkedin.com/in/harisekhon



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