[ https://issues.apache.org/jira/browse/HADOOP-15696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16604078#comment-16604078 ]
Hadoop QA commented on HADOOP-15696: ------------------------------------ | (/) *{color:green}+1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 35s{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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 2m 15s{color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 24m 0s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 24m 38s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 3m 36s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 3m 21s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 20m 22s{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} 3m 20s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 55s{color} | {color:green} trunk passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 19s{color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 44s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 16m 58s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 16m 58s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 3m 40s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 2m 30s{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} xml {color} | {color:green} 0m 3s{color} | {color:green} The patch has no ill-formed XML file. {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 12m 33s{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} 3m 38s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 21s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} unit {color} | {color:green} 9m 7s{color} | {color:green} hadoop-common in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 4m 10s{color} | {color:green} hadoop-kms in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 4m 8s{color} | {color:green} hadoop-hdfs-httpfs in the patch passed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 43s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black}142m 29s{color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:ba1ab08 | | JIRA Issue | HADOOP-15696 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12938414/HADOOP-15696.003.patch | | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle xml | | uname | Linux 75a40e7d99e9 3.13.0-143-generic #192-Ubuntu SMP Tue Feb 27 10:45:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux | | Build tool | maven | | Personality | /testptch/patchprocess/precommit/personality/provided.sh | | git revision | trunk / 6ccb809 | | maven | version: Apache Maven 3.3.9 | | Default Java | 1.8.0_181 | | findbugs | v3.1.0-RC1 | | Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/15138/testReport/ | | Max. process+thread count | 1353 (vs. ulimit of 10000) | | modules | C: hadoop-common-project/hadoop-common hadoop-common-project/hadoop-kms hadoop-hdfs-project/hadoop-hdfs-httpfs U: . | | Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/15138/console | | Powered by | Apache Yetus 0.8.0 http://yetus.apache.org | This message was automatically generated. > KMS performance regression due to too many open file descriptors after Jetty > migration > -------------------------------------------------------------------------------------- > > Key: HADOOP-15696 > URL: https://issues.apache.org/jira/browse/HADOOP-15696 > Project: Hadoop Common > Issue Type: Bug > Components: kms > Affects Versions: 3.0.0-alpha2 > Reporter: Wei-Chiu Chuang > Assignee: Wei-Chiu Chuang > Priority: Blocker > Attachments: HADOOP-15696.001.patch, HADOOP-15696.002.patch, > HADOOP-15696.003.patch, Screen Shot 2018-08-22 at 11.36.16 AM.png, Screen > Shot 2018-08-22 at 4.26.51 PM.png, Screen Shot 2018-08-22 at 4.26.51 PM.png, > Screen Shot 2018-08-22 at 4.27.02 PM.png, Screen Shot 2018-08-22 at 4.30.32 > PM.png, Screen Shot 2018-08-22 at 4.30.39 PM.png, Screen Shot 2018-08-24 at > 7.08.16 PM.png > > > We recently found KMS performance regressed in Hadoop 3.0, possibly linking > to the migration from Tomcat to Jetty in HADOOP-13597. > Symptoms: > # Hadoop 3.x KMS open file descriptors quickly rises to more than 10 thousand > under stress, sometimes even exceeds 32K, which is the system limit, causing > failures for any access to encryption zones. Our internal testing shows the > openfd number was in the range of a few hundred in Hadoop 2.x, and it > increases by almost 100x in Hadoop 3. > # Hadoop 3.x KMS as much as twice the heap size than in Hadoop 2.x. The same > heap size can go OOM in Hadoop 3.x. Jxray analysis suggests most of them are > temporary byte arrays associated with open SSL connections. > # Due to the heap usage, Hadoop 3.x KMS has more frequent GC activities, and > we observed up to 20% performance reduction due to GC. > A possible solution is to reduce the idle timeout setting in HttpServer2. It > is currently hard-coded 10 seconds. By setting it to 1 second, open fds > dropped from 20 thousand down to 3 thousand in my experiment. > File this jira to invite open discussion for a solution. > Credit: [~mi...@cloudera.com] for the proposed Jetty idle timeout remedy; > [~xiaochen] for digging into this problem. > Screenshots: > CDH5 (Hadoop 2) KMS CPU utilization, resident memory and file descriptor > chart. > !Screen Shot 2018-08-22 at 4.30.39 PM.png! > CDH6 (Hadoop 3) KMS CPU utilization, resident memory and file descriptor > chart. > !Screen Shot 2018-08-22 at 4.30.32 PM.png! > CDH5 (Hadoop 2) GC activities on the KMS process > !Screen Shot 2018-08-22 at 4.26.51 PM.png! > CDH6 (Hadoop 3) GC activities on the KMS process > !Screen Shot 2018-08-22 at 4.27.02 PM.png! > JXray report > !Screen Shot 2018-08-22 at 11.36.16 AM.png! > open fd drops from 20 k down to 3k after the proposed change. > !Screen Shot 2018-08-24 at 7.08.16 PM.png! -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org