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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11398) RetryUpToMaximumTimeWithFixedSleep needs to behave more accurately
Date Tue, 14 Jul 2015 23:51:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627296#comment-14627296
] 

Hadoop QA commented on HADOOP-11398:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  15m 18s | Findbugs (version ) appears to be broken on
trunk. |
| {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 3 new
or modified test files. |
| {color:green}+1{color} | javac |   7m 42s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |   9m 44s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 22s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 39s | There were no new checkstyle issues. |
| {color:red}-1{color} | whitespace |   0m  0s | The patch has 1  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 21s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | 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:green}+1{color} | common tests |  22m 19s | Tests passed in hadoop-common. |
| | |  59m 54s | |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12745345/HADOOP-11398.003.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 0a16ee6 |
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/7279/artifact/patchprocess/whitespace.txt
|
| hadoop-common test log | https://builds.apache.org/job/PreCommit-HADOOP-Build/7279/artifact/patchprocess/testrun_hadoop-common.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/7279/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.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/7279/console |


This message was automatically generated.

> RetryUpToMaximumTimeWithFixedSleep needs to behave more accurately
> ------------------------------------------------------------------
>
>                 Key: HADOOP-11398
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11398
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Li Lu
>            Assignee: Li Lu
>         Attachments: HADOOP-11398-121114.patch, HADOOP-11398.002.patch, HADOOP-11398.003.patch
>
>
> RetryUpToMaximumTimeWithFixedSleep now inherits RetryUpToMaximumCountWithFixedSleep and
just acts as a wrapper to decide maxRetries. The current implementation uses (maxTime / sleepTime)
as the number of maxRetries. This is fine if the actual for each retry is significantly less
than the sleep time, but it becomes less accurate if each retry takes comparable amount of
time as the sleep time. The problem gets worse when there are underlying retries. 
> We may want to use timers inside RetryUpToMaximumTimeWithFixedSleep to perform accurate
timing. 



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