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https://issues.apache.org/jira/browse/HADOOP-17597?focusedWorklogId=569970&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-569970
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ASF GitHub Bot logged work on HADOOP-17597:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 22/Mar/21 19:30
Start Date: 22/Mar/21 19:30
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #2801:
URL: https://github.com/apache/hadoop/pull/2801#issuecomment-804336566
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 1m 20s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
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| +0 :ok: | codespell | 0m 1s | | 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 2 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +0 :ok: | mvndep | 14m 8s | | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 23m 58s | | trunk passed |
| +1 :green_heart: | compile | 24m 45s | | trunk passed with JDK
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | compile | 20m 54s | | trunk passed with JDK
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| +1 :green_heart: | checkstyle | 4m 23s | | trunk passed |
| +1 :green_heart: | mvnsite | 2m 45s | | trunk passed |
| -1 :x: | javadoc | 1m 7s |
[/branch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/artifact/out/branch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt)
| hadoop-common in trunk failed with JDK
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04. |
| +1 :green_heart: | javadoc | 2m 20s | | trunk passed with JDK
Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| +1 :green_heart: | spotbugs | 3m 41s | | trunk passed |
| +1 :green_heart: | shadedclient | 18m 19s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 23s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 1m 32s | | the patch passed |
| +1 :green_heart: | compile | 22m 8s | | the patch passed with JDK
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javac | 22m 8s | | the patch passed |
| +1 :green_heart: | compile | 19m 7s | | the patch passed with JDK
Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| +1 :green_heart: | javac | 19m 7s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| -0 :warning: | checkstyle | 3m 55s |
[/results-checkstyle-root.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/artifact/out/results-checkstyle-root.txt)
| root: The patch generated 2 new + 13 unchanged - 2 fixed = 15 total (was
15) |
| +1 :green_heart: | mvnsite | 2m 16s | | the patch passed |
| -1 :x: | javadoc | 0m 57s |
[/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/artifact/out/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt)
| hadoop-common in the patch failed with JDK
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04. |
| +1 :green_heart: | javadoc | 2m 8s | | the patch passed with JDK
Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| +1 :green_heart: | spotbugs | 4m 2s | | the patch passed |
| +1 :green_heart: | shadedclient | 17m 30s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 17m 19s | | hadoop-common in the patch
passed. |
| +1 :green_heart: | unit | 2m 9s | | hadoop-aws in the patch passed.
|
| +1 :green_heart: | asflicense | 0m 50s | | The patch does not
generate ASF License warnings. |
| | | 215m 55s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/2801 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell |
| uname | Linux ed608e3d2bfe 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 91c7e74261efd63daf448cce321e4b6e7f4158ed |
| Default Java | Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/testReport/ |
| Max. process+thread count | 1274 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws
U: . |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2801/1/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: 569970)
Time Spent: 0.5h (was: 20m)
> Add option to downgrade S3A rejection of Syncable to warning
> ------------------------------------------------------------
>
> Key: HADOOP-17597
> URL: https://issues.apache.org/jira/browse/HADOOP-17597
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.3.1
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The Hadoop Filesystem Syncable API is intended to meet the requirements laid
> out in [StoneBraker81] _Operating System Support for Database Management_
> bq. The service required from an OS buffer manager is a selectedforce out
> which would push the intentions list and the commit flag to disk in the
> proper order. Such a service is not present in any buffer manager known to us.
> It's an expensive operation -so expensive that {{Syncable.hsync()}} isn't
> even called on {{DFSOutputStream.close()}}. I
> Even though S3A does not manifest any data until close() is called,
> applications coming from HDFS may call Syncable methods and expect to them to
> persist data with the durability guarantees offered by HDFS.
> Since the output stream hardening of HADOOP-13327, S3A throws
> UnsupportedOperationException to indicate that the synchronization semantics
> of Syncable absolutely cannot be met.
> As a result, applications which have been calling the Syncable APIs are
> finding the call failing. In the absence of exception handling to recognise
> that the durability semantics are being met, they fail.
> If the user and the application actually expects data to be persisted, this
> is the correct behaviour. The data cannot be persisted this way.
> If, however, they were calling this on HDFS more as a {{flush()}} than the
> full and expensive DBMS-class persistence call, then this failure is
> unwelcome. The applications really needs to catch the
> UnsupportedOperationException raised by S3A _or any other FS strictly
> reporting failures_, report the problem and perform some other means of safe
> data storage
> Even better, they can use hasPathCapability on the FS or hasCapability() on
> the stream to probe before even opening a file or trying to sync it. the
> hasCapability() on a stream was actually implemented in Hadooop-2.x precisely
> to allow applications to identify when a stream could not meet the guarantees
> (e.g some of the encrypted streams, file:// before HADOOP-13...)
> Until they can correct their code, I propose adding the option for s3a to
> downgrade
> fs.s3a.downgrade.syncable.exceptions
> This will
> * Log once per process at WARN
> * downgrade the calls to noop()
> * increment counters in S3A stats and IO stats of invocations of the Syncable
> methods. This will allow for stats gathering to let us identify which
> applications need fixing in cloud deployments
> Testing: copy the hsync tests but expect exceptions to be swallowed and stats
> to be collected
> Also: UnsupportedException text will link to this JIRA
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