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https://issues.apache.org/jira/browse/HDFS-16456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17494847#comment-17494847
]
Hadoop QA commented on HDFS-16456:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 13m
23s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} No case conflicting files
found. {color} |
| {color:green}+1{color} | {color:green} {color} | {color:green} 0m 0s{color}
| {color:green}test4tests{color} | {color:green} The patch appears to include 2
new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} || ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 12m
39s{color} | {color:blue}{color} | {color:blue} Maven dependency ordering for
branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 21m
22s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 22m
26s{color} | {color:green}{color} | {color:green} trunk passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 19m
30s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 3m
33s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 3m
23s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
26m 50s{color} | {color:green}{color} | {color:green} branch has no errors when
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m
26s{color} | {color:green}{color} | {color:green} trunk passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 3m
30s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 38m
44s{color} | {color:blue}{color} | {color:blue} Both FindBugs and SpotBugs are
enabled, using SpotBugs. {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green} 5m
54s{color} | {color:green}{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
28s{color} | {color:blue}{color} | {color:blue} Maven dependency ordering for
patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
15s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 21m
45s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 21m
45s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 19m
28s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 19m
28s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}
3m 29s{color} |
{color:orange}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/artifact/out/diff-checkstyle-root.txt{color}
| {color:orange} root: The patch generated 13 new + 155 unchanged - 0 fixed =
168 total (was 155) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 3m
18s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} The patch has no whitespace
issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
19m 23s{color} | {color:green}{color} | {color:green} patch has no errors when
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m
24s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 3m
26s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 {color} |
| {color:red}-1{color} | {color:red} spotbugs {color} | {color:red} 2m
39s{color} |
{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/artifact/out/new-spotbugs-hadoop-common-project_hadoop-common.html{color}
| {color:red} hadoop-common-project/hadoop-common generated 1 new + 0
unchanged - 0 fixed = 1 total (was 0) {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 28m
1s{color} | {color:green}{color} | {color:green} hadoop-common in the patch
passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}259m 50s{color}
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{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 1m
10s{color} | {color:green}{color} | {color:green} The patch does not generate
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}504m 6s{color} |
{color:black}{color} | {color:black}{color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-common-project/hadoop-common |
| | org.apache.hadoop.net.NetworkTopology.remove(Node) does not release lock
on all exception paths At NetworkTopology.java:on all exception paths At
NetworkTopology.java:[line 226] |
| Failed junit tests | hadoop.net.TestNetworkTopology |
| |
hadoop.hdfs.server.blockmanagement.TestReconstructStripedBlocksWithRackAwareness
|
| | hadoop.hdfs.net.TestDFSNetworkTopology |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/artifact/out/Dockerfile
|
| JIRA Issue | HDFS-16456 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/13040250/HDFS-16456.002.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient spotbugs checkstyle |
| uname | Linux c7ffa1647281 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / a4f459097b0 |
| Default Java | Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| Test Results |
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/testReport/ |
| Max. process+thread count | 3219 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output |
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/756/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |
This message was automatically generated.
> EC: Decommission a rack with only on dn will fail when the rack number is
> equal with replication
> ------------------------------------------------------------------------------------------------
>
> Key: HDFS-16456
> URL: https://issues.apache.org/jira/browse/HDFS-16456
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ec, namenode
> Affects Versions: 3.4.0
> Reporter: caozhiqiang
> Priority: Critical
> Attachments: HDFS-16456.001.patch, HDFS-16456.002.patch
>
>
> In below scenario, decommission will fail by TOO_MANY_NODES_ON_RACK reason:
> # Enable EC policy, such as RS-6-3-1024k.
> # The rack number in this cluster is equal with the replication number(9)
> # A rack only has one DN, and decommission this DN.
> The root cause is in
> BlockPlacementPolicyRackFaultTolerant::getMaxNodesPerRack() function, it will
> give a limit parameter maxNodesPerRack for choose targets. In this scenario,
> the maxNodesPerRack is 1, which means each rack can only be chosen one
> datanode.
> {code:java}
> protected int[] getMaxNodesPerRack(int numOfChosen, int numOfReplicas) {
> ...
> // If more replicas than racks, evenly spread the replicas.
> // This calculation rounds up.
> int maxNodesPerRack = (totalNumOfReplicas - 1) / numOfRacks + 1;
> return new int[] {numOfReplicas, maxNodesPerRack};
> } {code}
> int maxNodesPerRack = (totalNumOfReplicas - 1) / numOfRacks + 1;
> here will be called, where totalNumOfReplicas=9 and numOfRacks=9
> When we decommission one dn which is only one node in its rack, the
> chooseOnce() in BlockPlacementPolicyRackFaultTolerant::chooseTargetInOrder()
> will throw NotEnoughReplicasException, but the exception will not be caught
> and fail to fallback to chooseEvenlyFromRemainingRacks() function.
> When decommission, after choose targets, verifyBlockPlacement() function will
> return the total rack number contains the invalid rack, and
> BlockPlacementStatusDefault::isPlacementPolicySatisfied() will return false
> and it will also cause decommission fail.
> {code:java}
> public BlockPlacementStatus verifyBlockPlacement(DatanodeInfo[] locs,
> int numberOfReplicas) {
> if (locs == null)
> locs = DatanodeDescriptor.EMPTY_ARRAY;
> if (!clusterMap.hasClusterEverBeenMultiRack()) {
> // only one rack
> return new BlockPlacementStatusDefault(1, 1, 1);
> }
> // Count locations on different racks.
> Set<String> racks = new HashSet<>();
> for (DatanodeInfo dn : locs) {
> racks.add(dn.getNetworkLocation());
> }
> return new BlockPlacementStatusDefault(racks.size(), numberOfReplicas,
> clusterMap.getNumOfRacks());
> } {code}
> {code:java}
> public boolean isPlacementPolicySatisfied() {
> return requiredRacks <= currentRacks || currentRacks >= totalRacks;
> }{code}
> According to the above description, we should make the below modify to fix it:
> # In startDecommission() or stopDecommission(), we should also change the
> numOfRacks in class NetworkTopology. Or choose targets may fail for the
> maxNodesPerRack is too small. And even choose targets success,
> isPlacementPolicySatisfied will also return false cause decommission fail.
> # In BlockPlacementPolicyRackFaultTolerant::chooseTargetInOrder(), the first
> chooseOnce() function should also be put in try..catch..., or it will not
> fallback to call chooseEvenlyFromRemainingRacks() when throw exception.
> # In chooseEvenlyFromRemainingRacks(), this numResultsOflastChoose =
> results.size(); code should be move to after chooseOnce(), or it will throw
> lastException and make choose targets failed.
>
>
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