[
https://issues.apache.org/jira/browse/HADOOP-17749?focusedWorklogId=618528&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-618528
]
ASF GitHub Bot logged work on HADOOP-17749:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 05/Jul/21 05:18
Start Date: 05/Jul/21 05:18
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #3080:
URL: https://github.com/apache/hadoop/pull/3080#issuecomment-873809787
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 31s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
include 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 31m 4s | | trunk passed |
| +1 :green_heart: | compile | 21m 41s | | trunk passed with JDK
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 |
| +1 :green_heart: | compile | 19m 0s | | trunk passed with JDK
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| +1 :green_heart: | checkstyle | 1m 7s | | trunk passed |
| +1 :green_heart: | mvnsite | 1m 31s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 9s | | trunk passed with JDK
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 |
| +1 :green_heart: | javadoc | 1m 47s | | trunk passed with JDK
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| +1 :green_heart: | spotbugs | 2m 25s | | trunk passed |
| +1 :green_heart: | shadedclient | 15m 51s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 0m 53s | | the patch passed |
| +1 :green_heart: | compile | 20m 10s | | the patch passed with JDK
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 |
| +1 :green_heart: | javac | 20m 10s | | the patch passed |
| +1 :green_heart: | compile | 18m 11s | | the patch passed with JDK
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| +1 :green_heart: | javac | 18m 11s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 1m 5s | |
hadoop-common-project/hadoop-common: The patch generated 0 new + 6 unchanged -
7 fixed = 6 total (was 13) |
| +1 :green_heart: | mvnsite | 1m 34s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 7s | | the patch passed with JDK
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 |
| +1 :green_heart: | javadoc | 1m 41s | | the patch passed with JDK
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| +1 :green_heart: | spotbugs | 2m 36s | | the patch passed |
| +1 :green_heart: | shadedclient | 15m 56s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 17m 4s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | asflicense | 0m 58s | | The patch does not
generate ASF License warnings. |
| | | 177m 51s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3080/7/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/3080 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell |
| uname | Linux bf2c58d82d3f 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22
16:55:30 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / e822825ed6c96e1094c24031650528b578143e08 |
| Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3080/7/testReport/ |
| Max. process+thread count | 1549 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common U:
hadoop-common-project/hadoop-common |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3080/7/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 618528)
Time Spent: 3h 50m (was: 3h 40m)
> Remove lock contention in SelectorPool of SocketIOWithTimeout
> -------------------------------------------------------------
>
> Key: HADOOP-17749
> URL: https://issues.apache.org/jira/browse/HADOOP-17749
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Reporter: Xuesen Liang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> *SelectorPool* in
> hadoop-common/src/main/java/org/apache/hadoop/net/*SocketIOWithTimeout.java*
> is a point of lock contention.
> For example:
> {code:java}
> $ grep 'waiting to lock <0x00007f7d94006d90>' 63692.jstack | uniq -c
> 1005 - waiting to lock <0x00007f7d94006d90> (a
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool)
> {code}
> and the thread stack is as follows:
> {code:java}
> "IPC Client (324579982) connection to /100.10.6.10:60020 from user_00" #14139
> daemon prio=5 os_prio=0 tid=0x00007f7374039000 nid=0x85cc waiting for monitor
> entry [0x00007f6f45939000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.get(SocketIOWithTimeout.java:390)
> - waiting to lock <0x00007f7d94006d90> (a
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool)
> at
> org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:325)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:157)
> at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
> at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
> at java.io.FilterInputStream.read(FilterInputStream.java:133)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
> - locked <0x00007fa818caf258> (a java.io.BufferedInputStream)
> at java.io.DataInputStream.readInt(DataInputStream.java:387)
> at
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.readResponse(RpcClientImpl.java:967)
> at
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.run(RpcClientImpl.java:568)
> {code}
> We should remove the lock contention.
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