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https://issues.apache.org/jira/browse/HDFS-14646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925405#comment-16925405
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Hadoop QA commented on HDFS-14646:
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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} 1m
22s{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} 25m
10s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
15s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
0s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
24s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
15m 42s{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} 2m
29s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
10s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
46s{color} | {color:green} hadoop-hdfs-project/hadoop-hdfs: The patch generated
0 new + 75 unchanged - 12 fixed = 75 total (was 87) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
15s{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}
13m 58s{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} 2m
33s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
58s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 95m 21s{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 0m
50s{color} | {color:red} The patch generated 12 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}167m 45s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.TestFSInputChecker |
| |
hadoop.hdfs.server.namenode.snapshot.TestINodeFileUnderConstructionWithSnapshot
|
| | hadoop.hdfs.TestAclsEndToEnd |
| | hadoop.hdfs.TestErasureCodingPoliciesWithRandomECPolicy |
| | hadoop.hdfs.TestDFSStripedInputStream |
| | hadoop.hdfs.server.balancer.TestBalancer |
| | hadoop.hdfs.server.mover.TestMover |
| | hadoop.hdfs.server.namenode.ha.TestBootstrapAliasmap |
| | hadoop.hdfs.TestMaintenanceState |
| | hadoop.hdfs.TestUnsetAndChangeDirectoryEcPolicy |
| | hadoop.hdfs.TestReconstructStripedFileWithRandomECPolicy |
| | hadoop.hdfs.TestHDFSFileSystemContract |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.2 Server=19.03.2 Image:yetus/hadoop:bdbca0e53b4 |
| JIRA Issue | HDFS-14646 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12979809/HDFS-14646.004.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient findbugs checkstyle |
| uname | Linux 63c676e81173 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 3b9584d |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_222 |
| findbugs | v3.1.0-RC1 |
| unit |
https://builds.apache.org/job/PreCommit-HDFS-Build/27820/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/27820/testReport/ |
| asflicense |
https://builds.apache.org/job/PreCommit-HDFS-Build/27820/artifact/out/patch-asflicense-problems.txt
|
| Max. process+thread count | 2272 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U:
hadoop-hdfs-project/hadoop-hdfs |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/27820/console |
| Powered by | Apache Yetus 0.8.0 http://yetus.apache.org |
This message was automatically generated.
> Standby NameNode should not upload fsimage to an inappropriate NameNode.
> ------------------------------------------------------------------------
>
> Key: HDFS-14646
> URL: https://issues.apache.org/jira/browse/HDFS-14646
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 3.1.2
> Reporter: Xudong Cao
> Assignee: Xudong Cao
> Priority: Major
> Attachments: HDFS-14646.000.patch, HDFS-14646.001.patch,
> HDFS-14646.002.patch, HDFS-14646.003.patch, HDFS-14646.004.patch
>
>
> *Problem Description:*
> In the multi-NameNode scenario, when a SNN uploads a FsImage, it will put
> the image to all other NNs (whether the peer NN is an ANN or not), and even
> if the peer NN immediately replies an error (such as
> TransferResult.NOT_ACTIVE_NAMENODE_FAILURE, TransferResult
> .OLD_TRANSACTION_ID_FAILURE, etc.), the local SNN will not terminate the put
> process immediately, but will put the FsImage completely to the peer NN, and
> will not read the peer NN's reply until the put is completed.
> Depending on the version of Jetty, this behavior can lead to different
> consequences, I tested it under 2.7.2 and trunk version.
> *1.In Hadoop 2.7.2 (with Jetty 6.1.26)*
> After peer NN called HttpServletResponse.sendError(), the underlying TCP
> connection will still be established, and the data SNN sent will be read by
> Jetty framework itself in the peer NN side, so the SNN will insignificantly
> send the FsImage to the peer NN continuously, causing a waste of time and
> bandwidth. In a relatively large HDFS cluster, the size of FsImage can often
> reach about 30GB, This is indeed a big waste.
> *2.In trunk version (with Jetty 9.3.27)*
> After peer NN called HttpServletResponse.sendError(), the underlying TCP
> connection will be auto closed, and then SNN will directly get an "Error
> writing request body to server" exception, as below, note this test needs a
> relatively big FSImage (e.g. 10MB level):
> {code:java}
> 2019-08-17 03:59:25,413 INFO namenode.TransferFsImage: Sending fileName:
> /tmp/hadoop-root/dfs/name/current/fsimage_0000000000003364240, fileSize:
> 9864721. Sent total: 524288 bytes. Size of last segment intended to send:
> 4096 bytes.
> java.io.IOException: Error writing request body to server
> at
> sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.checkError(HttpURLConnection.java:3587)
> at
> sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.write(HttpURLConnection.java:3570)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.copyFileToStream(TransferFsImage.java:396)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.writeFileToPutRequest(TransferFsImage.java:340)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.uploadImage(TransferFsImage.java:314)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.uploadImageFromStorage(TransferFsImage.java:249)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.StandbyCheckpointer$1.call(StandbyCheckpointer.java:277)
> at
> org.apache.hadoop.hdfs.server.namenode.ha.StandbyCheckpointer$1.call(StandbyCheckpointer.java:272)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> 2019-08-17 03:59:25,422 INFO namenode.TransferFsImage: Sending fileName:
> /tmp/hadoop-root/dfs/name/current/fsimage_0000000000003364240, fileSize:
> 9864721. Sent total: 851968 bytes. Size of last segment intended to send:
> 4096 bytes.
> java.io.IOException: Error writing request body to server
> at
> sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.checkError(HttpURLConnection.java:3587)
> at
> sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.write(HttpURLConnection.java:3570)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.copyFileToStream(TransferFsImage.java:396)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.writeFileToPutRequest(TransferFsImage.java:340)
> {code}
>
> *Solution:*
> A standby NameNode should not upload fsimage to an inappropriate NameNode,
> when he plans to put a FsImage to the peer NN, he need to check whether he
> really need to put it at this time.
> In detail, local SNN should establish an HTTP connection with the peer NN,
> send the put request, and then immediately read the response (this is the key
> point). If the peer NN does not reply an HTTP_OK, it means the local SNN
> should not put image at this time.
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