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https://issues.apache.org/jira/browse/HDFS-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537230#comment-14537230
]
Hadoop QA commented on HDFS-5270:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 15m 4s | 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 8 new or modified test files. |
| {color:green}+1{color} | javac | 7m 42s | There were no new javac warning
messages. |
| {color:red}-1{color} | javadoc | 9m 58s | The applied patch generated 1
additional warning messages. |
| {color:green}+1{color} | release audit | 0m 22s | The applied patch does
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle | 2m 20s | The applied patch generated
33 new checkstyle issues (total was 545, now 560). |
| {color:red}-1{color} | whitespace | 0m 8s | The patch has 6 line(s) that
end in whitespace. Use git apply --whitespace=fix. |
| {color:green}+1{color} | install | 1m 38s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 34s | The patch built with
eclipse:eclipse. |
| {color:red}-1{color} | findbugs | 3m 11s | The patch appears to introduce 2
new Findbugs (version 2.0.3) warnings. |
| {color:green}+1{color} | native | 3m 18s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 164m 40s | Tests failed in hadoop-hdfs. |
| | | 209m 1s | |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
| | Inconsistent synchronization of
org.apache.hadoop.hdfs.server.datanode.PeerXceiverStopper.future; locked 66% of
time Unsynchronized access at PeerXceiverStopper.java:66% of time
Unsynchronized access at PeerXceiverStopper.java:[line 89] |
| | Inconsistent synchronization of
org.apache.hadoop.hdfs.server.datanode.XceiverRunnable.runner; locked 50% of
time Unsynchronized access at XceiverRunnable.java:50% of time Unsynchronized
access at XceiverRunnable.java:[line 49] |
| Failed unit tests | hadoop.tracing.TestTraceAdmin |
| | hadoop.hdfs.tools.TestHdfsConfigFields |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12731791/HDFS-5270.3.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 4536399 |
| javadoc |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/artifact/patchprocess/diffJavadocWarnings.txt
|
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| whitespace |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/artifact/patchprocess/whitespace.txt
|
| Findbugs warnings |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/10903/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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/10903/console |
This message was automatically generated.
> Use thread pools in the datenode daemons
> ----------------------------------------
>
> Key: HDFS-5270
> URL: https://issues.apache.org/jira/browse/HDFS-5270
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Haohui Mai
> Assignee: zhangduo
> Labels: BB2015-05-TBR
> Attachments: HDFS-5270.000.patch, HDFS-5270.2.patch,
> HDFS-5270.3.patch, TestConcurrentAccess.java
>
>
> The current implementation of the datanode creates a thread when a new
> request comes in. This incurs high overheads for the creation / destruction
> of threads, making the datanode unstable under high concurrent loads.
> This JIRA proposes to use a thread pool to reduce the overheads.
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