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https://issues.apache.org/jira/browse/HADOOP-19180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17874449#comment-17874449
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ASF GitHub Bot commented on HADOOP-19180:
-----------------------------------------

hadoop-yetus commented on PR #6972:
URL: https://github.com/apache/hadoop/pull/6972#issuecomment-2294792640

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  0s |  |  No case conflicting files 
found.  |
   | +0 :ok: |  codespell  |   0m  0s |  |  codespell was not available.  |
   | +0 :ok: |  detsecrets  |   0m  0s |  |  detect-secrets 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 _ |
   | +1 :green_heart: |  mvninstall  |  33m  4s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |   8m 13s |  |  trunk passed  |
   | +1 :green_heart: |  checkstyle  |   0m 44s |  |  trunk passed  |
   | +1 :green_heart: |  mvnsite  |   1m  0s |  |  trunk passed  |
   | +1 :green_heart: |  javadoc  |   0m 44s |  |  trunk passed  |
   | +1 :green_heart: |  spotbugs  |   1m 35s |  |  trunk passed  |
   | +1 :green_heart: |  shadedclient  |  20m 58s |  |  branch has no errors 
when building and testing our client artifacts.  |
   | -0 :warning: |  patch  |  21m 12s |  |  Used diff version of patch file. 
Binary files and potentially other changes not applied. Please rebase and 
squash commits if necessary.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   0m 33s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   7m 52s |  |  the patch passed  |
   | +1 :green_heart: |  cc  |   7m 52s |  |  the patch passed  |
   | +1 :green_heart: |  golang  |   7m 52s |  |  the patch passed  |
   | +1 :green_heart: |  javac  |   7m 52s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks 
issues.  |
   | +1 :green_heart: |  checkstyle  |   0m 39s |  |  the patch passed  |
   | +1 :green_heart: |  mvnsite  |   0m 57s |  |  the patch passed  |
   | +1 :green_heart: |  javadoc  |   0m 38s |  |  the patch passed  |
   | +1 :green_heart: |  spotbugs  |   1m 37s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  20m 34s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | -1 :x: |  unit  |  16m 26s | 
[/patch-unit-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6972/6/artifact/out/patch-unit-hadoop-common-project_hadoop-common.txt)
 |  hadoop-common in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 41s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 134m 46s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.service.launcher.TestServiceInterruptHandling |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.46 ServerAPI=1.46 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6972/6/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/6972 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets cc golang |
   | uname | Linux 1851c485c37d 5.15.0-117-generic #127-Ubuntu SMP Fri Jul 5 
20:13:28 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 3256c183be6dab33c9639e07c27c5c0aec3b0877 |
   | Default Java | Red Hat, Inc.-1.8.0_412-b08 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6972/6/testReport/ |
   | Max. process+thread count | 3149 (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-6972/6/console |
   | versions | git=2.9.5 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> EC: Fix calculation errors caused by special index order
> --------------------------------------------------------
>
>                 Key: HADOOP-19180
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19180
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Chenyu Zheng
>            Assignee: Chenyu Zheng
>            Priority: Critical
>              Labels: pull-request-available
>
> I found that if the erasedIndexes distribution is such that the parity index 
> is in front of the data index, ec will produce wrong results when decoding.
> In fact, HDFS-15186 has described this problem, but does not fundamentally 
> solve it.
> The reason is that the code assumes that erasedIndexes is preceded by the 
> data index and followed by parity index. If there is a parity index placed in 
> front of the data index, a calculation error will occur.



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