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Hadoop QA commented on HDFS-8855: --------------------------------- \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | pre-patch | 19m 53s | Pre-patch trunk compilation is healthy. | | {color:green}+1{color} | @author | 0m 0s | The patch does not contain any @author tags. | | {color:green}+1{color} | tests included | 0m 0s | The patch appears to include 1 new or modified test files. | | {color:green}+1{color} | javac | 7m 50s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 10m 23s | There were no new javadoc warning messages. | | {color:green}+1{color} | release audit | 0m 23s | The applied patch does not increase the total number of release audit warnings. | | {color:green}+1{color} | checkstyle | 2m 10s | There were no new checkstyle issues. | | {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that end in whitespace. | | {color:green}+1{color} | install | 1m 38s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 33s | The patch built with eclipse:eclipse. | | {color:red}-1{color} | findbugs | 2m 17s | Post-patch findbugs hadoop-hdfs-project/hadoop-hdfs compilation is broken. | | {color:green}+1{color} | findbugs | 2m 17s | The patch does not introduce any new Findbugs (version ) warnings. | | {color:red}-1{color} | common tests | 0m 24s | Tests failed in hadoop-common. | | {color:red}-1{color} | hdfs tests | 0m 25s | Tests failed in hadoop-hdfs. | | | | 46m 2s | | \\ \\ || Reason || Tests || | Failed build | hadoop-common | | | hadoop-hdfs | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12757177/HDFS-8855.005.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / 6b97fa6 | | hadoop-common test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12526/artifact/patchprocess/testrun_hadoop-common.txt | | hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12526/artifact/patchprocess/testrun_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12526/testReport/ | | Java | 1.7.0_55 | | uname | Linux asf909.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/12526/console | This message was automatically generated. > Webhdfs client leaks active NameNode connections > ------------------------------------------------ > > Key: HDFS-8855 > URL: https://issues.apache.org/jira/browse/HDFS-8855 > Project: Hadoop HDFS > Issue Type: Bug > Components: webhdfs > Reporter: Bob Hansen > Assignee: Xiaobing Zhou > Attachments: HDFS-8855.005.patch, HDFS-8855.1.patch, > HDFS-8855.2.patch, HDFS-8855.3.patch, HDFS-8855.4.patch, > HDFS_8855.prototype.patch > > > The attached script simulates a process opening ~50 files via webhdfs and > performing random reads. Note that there are at most 50 concurrent reads, > and all webhdfs sessions are kept open. Each read is ~64k at a random > position. > The script periodically (once per second) shells into the NameNode and > produces a summary of the socket states. For my test cluster with 5 nodes, > it took ~30 seconds for the NameNode to have ~25000 active connections and > fails. > It appears that each request to the webhdfs client is opening a new > connection to the NameNode and keeping it open after the request is complete. > If the process continues to run, eventually (~30-60 seconds), all of the > open connections are closed and the NameNode recovers. > This smells like SoftReference reaping. Are we using SoftReferences in the > webhdfs client to cache NameNode connections but never re-using them? -- This message was sent by Atlassian JIRA (v6.3.4#6332)