[ https://issues.apache.org/jira/browse/HADOOP-12421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14901690#comment-14901690 ]
Hadoop QA commented on HADOOP-12421: ------------------------------------ \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | pre-patch | 21m 41s | 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 | 8m 3s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 10m 28s | There were no new javadoc warning messages. | | {color:green}+1{color} | release audit | 0m 24s | The applied patch does not increase the total number of release audit warnings. | | {color:red}-1{color} | checkstyle | 1m 15s | The applied patch generated 1 new checkstyle issues (total was 6, now 7). | | {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that end in whitespace. | | {color:green}+1{color} | install | 1m 29s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 32s | The patch built with eclipse:eclipse. | | {color:green}+1{color} | findbugs | 1m 52s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. | | {color:red}-1{color} | common tests | 20m 50s | Tests failed in hadoop-common. | | | | 66m 37s | | \\ \\ || Reason || Tests || | Failed unit tests | hadoop.io.retry.TestFailoverProxy | | | hadoop.ipc.TestIPC | | | hadoop.io.retry.TestRetryProxy | | Timed out tests | org.apache.hadoop.io.compress.TestCodec | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12761522/HADOOP-12421-v1.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / b00392d | | checkstyle | https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/artifact/patchprocess/diffcheckstylehadoop-common.txt | | hadoop-common test log | https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/artifact/patchprocess/testrun_hadoop-common.txt | | Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/7684/testReport/ | | Java | 1.7.0_55 | | uname | Linux asf900.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-HADOOP-Build/7684/console | This message was automatically generated. > Add jitter to RetryInvocationHandler > ------------------------------------ > > Key: HADOOP-12421 > URL: https://issues.apache.org/jira/browse/HADOOP-12421 > Project: Hadoop Common > Issue Type: Bug > Affects Versions: 2.8.0 > Reporter: Elliott Clark > Assignee: Elliott Clark > Attachments: HADOOP-12421-v1.patch > > > Calls to NN can become synchronized across a cluster during NN failover. This > leads to a spike in requests until things recover. Making an already tricky > time worse. -- This message was sent by Atlassian JIRA (v6.3.4#6332)