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https://issues.apache.org/jira/browse/HDFS-8693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16134794#comment-16134794
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Hadoop QA commented on HDFS-8693:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
18s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m
0s{color} | {color:green} The patch appears to include 1 new or modified test
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 14m
26s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
48s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
37s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
5s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
53s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
46s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
59s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
36s{color} | {color:green} hadoop-hdfs-project/hadoop-hdfs: The patch generated
0 new + 51 unchanged - 1 fixed = 51 total (was 52) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
4s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m
0s{color} | {color:red} The patch has 1 line(s) that end in whitespace. Use git
apply --whitespace=fix <<patch_file>>. Refer https://git-scm.com/docs/git-apply
{color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m
8s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
43s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 78m 22s{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
29s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}107m 20s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests |
hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureToleration |
| | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure080 |
| | hadoop.hdfs.server.datanode.TestDirectoryScanner |
| | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
| | hadoop.hdfs.server.namenode.ha.TestHAAppend |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:14b5c93 |
| JIRA Issue | HDFS-8693 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12882813/HDFS-8693.03.patch |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux bb48ff496ea1 3.13.0-123-generic #172-Ubuntu SMP Mon Jun 26
18:04:35 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh
|
| git revision | trunk / 7a82d7b |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC1 |
| whitespace |
https://builds.apache.org/job/PreCommit-HDFS-Build/20773/artifact/patchprocess/whitespace-eol.txt
|
| unit |
https://builds.apache.org/job/PreCommit-HDFS-Build/20773/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/20773/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U:
hadoop-hdfs-project/hadoop-hdfs |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/20773/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> refreshNamenodes does not support adding a new standby to a running DN
> ----------------------------------------------------------------------
>
> Key: HDFS-8693
> URL: https://issues.apache.org/jira/browse/HDFS-8693
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, ha
> Affects Versions: 2.6.0
> Reporter: Jian Fang
> Assignee: Ajith S
> Priority: Critical
> Attachments: HDFS-8693.02.patch, HDFS-8693.03.patch, HDFS-8693.1.patch
>
>
> I tried to run the following command on a Hadoop 2.6.0 cluster with HA
> support
> $ hdfs dfsadmin -refreshNamenodes datanode-host:port
> to refresh name nodes on data nodes after I replaced one name node with a new
> one so that I don't need to restart the data nodes. However, I got the
> following error:
> refreshNamenodes: HA does not currently support adding a new standby to a
> running DN. Please do a rolling restart of DNs to reconfigure the list of NNs.
> I checked the 2.6.0 code and the error was thrown by the following code
> snippet, which led me to this JIRA.
> void refreshNNList(ArrayList<InetSocketAddress> addrs) throws IOException {
> Set<InetSocketAddress> oldAddrs = Sets.newHashSet();
> for (BPServiceActor actor : bpServices)
> { oldAddrs.add(actor.getNNSocketAddress()); }
> Set<InetSocketAddress> newAddrs = Sets.newHashSet(addrs);
> if (!Sets.symmetricDifference(oldAddrs, newAddrs).isEmpty())
> { // Keep things simple for now -- we can implement this at a later date.
> throw new IOException( "HA does not currently support adding a new standby to
> a running DN. " + "Please do a rolling restart of DNs to reconfigure the list
> of NNs."); }
> }
> Looks like this the refreshNameNodes command is an uncompleted feature.
> Unfortunately, the new name node on a replacement is critical for auto
> provisioning a hadoop cluster with HDFS HA support. Without this support, the
> HA feature could not really be used. I also observed that the new standby
> name node on the replacement instance could stuck in safe mode because no
> data nodes check in with it. Even with a rolling restart, it may take quite
> some time to restart all data nodes if we have a big cluster, for example,
> with 4000 data nodes, let alone restarting DN is way too intrusive and it is
> not a preferable operation in production. It also increases the chance for a
> double failure because the standby name node is not really ready for a
> failover in the case that the current active name node fails.
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