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https://issues.apache.org/jira/browse/HDFS-13448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16438254#comment-16438254
]
genericqa commented on HDFS-13448:
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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
23s{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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m
0s{color} | {color:red} The patch doesn't appear to include any new or modified
tests. Please justify why no new tests are needed for this patch. Also please
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
19s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 22m
41s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 26m
17s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 2m
43s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 2m
47s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
14m 48s{color} | {color:green} branch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 4m
43s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m
7s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
18s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
14s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 25m
20s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 25m
20s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}
3m 23s{color} | {color:orange} root: The patch generated 3 new + 475 unchanged
- 0 fixed = 478 total (was 475) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 2m
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
9m 36s{color} | {color:green} patch has no errors when building and testing our
client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 5m
15s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m
12s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m
14s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m
29s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}112m 50s{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
39s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}248m 26s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.namenode.ha.TestRetryCacheWithHA |
| | hadoop.hdfs.web.TestWebHdfsTimeouts |
| | hadoop.tools.TestHdfsConfigFields |
| | hadoop.hdfs.server.datanode.TestDataNodeErasureCodingMetrics |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8620d2b |
| JIRA Issue | HDFS-13448 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12919043/HDFS-13448.2.patch |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient findbugs checkstyle |
| uname | Linux 2a3959d36280 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20
11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 995cba6 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_162 |
| findbugs | v3.1.0-RC1 |
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/23934/artifact/out/diff-checkstyle-root.txt
|
| unit |
https://builds.apache.org/job/PreCommit-HDFS-Build/23934/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/23934/testReport/ |
| Max. process+thread count | 3335 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/23934/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> HDFS Block Placement - Ignore Locality for First Block Replica
> --------------------------------------------------------------
>
> Key: HDFS-13448
> URL: https://issues.apache.org/jira/browse/HDFS-13448
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: block placement, hdfs-client
> Affects Versions: 2.9.0, 3.0.1
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Attachments: HDFS-13448.1.patch, HDFS-13448.2.patch
>
>
> According to the HDFS Block Place Rules:
> {quote}
> /**
> * The replica placement strategy is that if the writer is on a datanode,
> * the 1st replica is placed on the local machine,
> * otherwise a random datanode. The 2nd replica is placed on a datanode
> * that is on a different rack. The 3rd replica is placed on a datanode
> * which is on a different node of the rack as the second replica.
> */
> {quote}
> However, there is a hint for the hdfs-client that allows the block placement
> request to not put a block replica on the local datanode _where 'local' means
> the same host as the client is being run on._
> {quote}
> /**
> * Advise that a block replica NOT be written to the local DataNode where
> * 'local' means the same host as the client is being run on.
> *
> * @see CreateFlag#NO_LOCAL_WRITE
> */
> {quote}
> I propose that we add a new flag that allows the hdfs-client to request that
> the first block replica be placed on a random DataNode in the cluster. The
> subsequent block replicas should follow the normal block placement rules.
> The issue is that when the {{NO_LOCAL_WRITE}} is enabled, the first block
> replica is not placed on the local node, but it is still placed on the local
> rack. Where this comes into play is where you have, for example, a flume
> agent that is loading data into HDFS.
> If the Flume agent is running on a DataNode, then by default, the DataNode
> local to the Flume agent will always get the first block replica and this
> leads to un-even block placements, with the local node always filling up
> faster than any other node in the cluster.
> Modifying this example, if the DataNode is removed from the host where the
> Flume agent is running, or this {{NO_LOCAL_WRITE}} is enabled by Flume, then
> the default block placement policy will still prefer the local rack. This
> remedies the situation only so far as now the first block replica will always
> be distributed to a DataNode on the local rack.
> This new flag would allow a single Flume agent to distribute the blocks
> randomly, evenly, over the entire cluster instead of hot-spotting the local
> node or the local rack.
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