[ https://issues.apache.org/jira/browse/HDFS-14646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16909485#comment-16909485 ]
Hadoop QA commented on HDFS-14646: ---------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || 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} 17m 31s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 54s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 39s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 0s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 32s{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 4s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 47s{color} | {color:green} trunk passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 56s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 53s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 53s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 33s{color} | {color:green} hadoop-hdfs-project/hadoop-hdfs: The patch generated 0 new + 81 unchanged - 1 fixed = 81 total (was 82) {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 0s{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} 11m 43s{color} | {color:green} patch has no errors when building and testing our client artifacts. {color} | | {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 8s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs generated 3 new + 0 unchanged - 0 fixed = 3 total (was 0) {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 46s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:red}-1{color} | {color:red} unit {color} | {color:red} 83m 45s{color} | {color:red} hadoop-hdfs in the patch failed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 32s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black}137m 0s{color} | {color:black} {color} | \\ \\ || Reason || Tests || | FindBugs | module:hadoop-hdfs-project/hadoop-hdfs | | | org.apache.hadoop.hdfs.server.namenode.ImageServlet.getParamsForPutImage(Storage, long, long, NNStorage$NameNodeFile, boolean) invokes inefficient Boolean constructor; use Boolean.valueOf(...) instead At ImageServlet.java:invokes inefficient Boolean constructor; use Boolean.valueOf(...) instead At ImageServlet.java:[line 510] | | | Primitive boxed just to call toString in org.apache.hadoop.hdfs.server.namenode.ImageServlet.getParamsForPutImage(Storage, long, long, NNStorage$NameNodeFile, boolean) At ImageServlet.java:toString in org.apache.hadoop.hdfs.server.namenode.ImageServlet.getParamsForPutImage(Storage, long, long, NNStorage$NameNodeFile, boolean) At ImageServlet.java:[line 510] | | | new org.apache.hadoop.hdfs.server.namenode.ImageServlet$PutImageParams(HttpServletRequest, HttpServletResponse, Configuration) invokes inefficient Boolean constructor; use Boolean.valueOf(...) instead At ImageServlet.java:inefficient Boolean constructor; use Boolean.valueOf(...) instead At ImageServlet.java:[line 696] | | Failed junit tests | hadoop.hdfs.qjournal.server.TestJournalNodeSync | | | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting | | | hadoop.hdfs.server.namenode.TestTransferFsImage | \\ \\ || Subsystem || Report/Notes || | Docker | Client=19.03.1 Server=19.03.1 Image:yetus/hadoop:bdbca0e | | JIRA Issue | HDFS-14646 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12977805/HDFS-14646.001.patch | | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle | | uname | Linux a9d460427f60 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux | | Build tool | maven | | Personality | /testptch/patchprocess/precommit/personality/provided.sh | | git revision | trunk / 8943e13 | | maven | version: Apache Maven 3.3.9 | | Default Java | 1.8.0_222 | | findbugs | v3.1.0-RC1 | | findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/27532/artifact/out/new-findbugs-hadoop-hdfs-project_hadoop-hdfs.html | | unit | https://builds.apache.org/job/PreCommit-HDFS-Build/27532/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/27532/testReport/ | | Max. process+thread count | 4528 (vs. ulimit of 10000) | | modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/27532/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 > > > *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. -- This message was sent by Atlassian JIRA (v7.6.14#76016) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org