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https://issues.apache.org/jira/browse/HADOOP-13263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15336819#comment-15336819
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Hadoop QA commented on HADOOP-13263:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
27s{color} | {color:blue} Docker mode activated. {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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m
8s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 8m
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
6s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
15s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
39s{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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
43s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 2m
27s{color} | {color:red} root in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 2m 27s{color}
| {color:red} root in the patch failed. {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m
27s{color} | {color:red} hadoop-common-project/hadoop-common: The patch
generated 85 new + 216 unchanged - 0 fixed = 301 total (was 216) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
11s{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:red}-1{color} | {color:red} findbugs {color} | {color:red} 1m
46s{color} | {color:red} hadoop-common-project/hadoop-common 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:red}-1{color} | {color:red} unit {color} | {color:red} 17m 25s{color}
| {color:red} hadoop-common in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
17s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 45m 53s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-common-project/hadoop-common |
| | Should org.apache.hadoop.security.Groups$Counter be a _static_ inner
class? At Groups.java:inner class? At Groups.java:[lines 249-263] |
| | Increment of volatile field
org.apache.hadoop.security.Groups$Counter.value in
org.apache.hadoop.security.Groups$Counter.decr() At Groups.java:in
org.apache.hadoop.security.Groups$Counter.decr() At Groups.java:[line 262] |
| | Increment of volatile field
org.apache.hadoop.security.Groups$Counter.value in
org.apache.hadoop.security.Groups$Counter.incr() At Groups.java:in
org.apache.hadoop.security.Groups$Counter.incr() At Groups.java:[line 258] |
| Failed junit tests | hadoop.metrics2.impl.TestGangliaMetrics |
| Timed out junit tests | org.apache.hadoop.http.TestHttpServerLifecycle |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:e2f6409 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12811219/HADOOP-13263.002.patch
|
| JIRA Issue | HADOOP-13263 |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux 884937add4bd 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 |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh
|
| git revision | trunk / 2800695 |
| Default Java | 1.8.0_91 |
| findbugs | v3.0.0 |
| compile |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/artifact/patchprocess/patch-compile-root.txt
|
| javac |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/artifact/patchprocess/patch-compile-root.txt
|
| checkstyle |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
|
| findbugs |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/artifact/patchprocess/new-findbugs-hadoop-common-project_hadoop-common.html
|
| unit |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U:
hadoop-common-project/hadoop-common |
| Console output |
https://builds.apache.org/job/PreCommit-HADOOP-Build/9818/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> Reload cached groups in background after expiry
> -----------------------------------------------
>
> Key: HADOOP-13263
> URL: https://issues.apache.org/jira/browse/HADOOP-13263
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Attachments: HADOOP-13263.001.patch, HADOOP-13263.002.patch
>
>
> In HADOOP-11238 the Guava cache was introduced to allow refreshes on the
> Namenode group cache to run in the background, avoiding many slow group
> lookups. Even with this change, I have seen quite a few clusters with issues
> due to slow group lookups. The problem is most prevalent in HA clusters,
> where a slow group lookup on the hdfs user can fail to return for over 45
> seconds causing the Failover Controller to kill it.
> The way the current Guava cache implementation works is approximately:
> 1) On initial load, the first thread to request groups for a given user
> blocks until it returns. Any subsequent threads requesting that user block
> until that first thread populates the cache.
> 2) When the key expires, the first thread to hit the cache after expiry
> blocks. While it is blocked, other threads will return the old value.
> I feel it is this blocking thread that still gives the Namenode issues on
> slow group lookups. If the call from the FC is the one that blocks and
> lookups are slow, if can cause the NN to be killed.
> Guava has the ability to refresh expired keys completely in the background,
> where the first thread that hits an expired key schedules a background cache
> reload, but still returns the old value. Then the cache is eventually
> updated. This patch introduces this background reload feature. There are two
> new parameters:
> 1) hadoop.security.groups.cache.background.reload - default false to keep the
> current behaviour. Set to true to enable a small thread pool and background
> refresh for expired keys
> 2) hadoop.security.groups.cache.background.reload.threads - only relevant if
> the above is set to true. Controls how many threads are in the background
> refresh pool. Default is 1, which is likely to be enough.
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