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https://issues.apache.org/jira/browse/HADOOP-19167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17845511#comment-17845511
 ] 

ASF GitHub Bot commented on HADOOP-19167:
-----------------------------------------

hadoop-yetus commented on PR #6807:
URL: https://github.com/apache/hadoop/pull/6807#issuecomment-2105295494

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m 01s |  |  No case conflicting files 
found.  |
   | +0 :ok: |  spotbugs  |   0m 00s |  |  spotbugs executables are not 
available.  |
   | +0 :ok: |  codespell  |   0m 01s |  |  codespell was not available.  |
   | +0 :ok: |  detsecrets  |   0m 01s |  |  detect-secrets was not available.  
|
   | +1 :green_heart: |  @author  |   0m 00s |  |  The patch does not contain 
any @author tags.  |
   | +1 :green_heart: |  test4tests  |   0m 00s |  |  The patch appears to 
include 1 new or modified test files.  |
   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  85m 54s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |  37m 46s |  |  trunk passed  |
   | +1 :green_heart: |  checkstyle  |   4m 25s |  |  trunk passed  |
   | -1 :x: |  mvnsite  |   4m 14s | 
[/branch-mvnsite-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6807/2/artifact/out/branch-mvnsite-hadoop-common-project_hadoop-common.txt)
 |  hadoop-common in trunk failed.  |
   | +1 :green_heart: |  javadoc  |   4m 43s |  |  trunk passed  |
   | +1 :green_heart: |  shadedclient  | 143m 33s |  |  branch has no errors 
when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   4m 40s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |  36m 18s |  |  the patch passed  |
   | +1 :green_heart: |  javac  |  36m 17s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m 00s |  |  The patch has no blanks 
issues.  |
   | +1 :green_heart: |  checkstyle  |   4m 38s |  |  the patch passed  |
   | -1 :x: |  mvnsite  |   4m 30s | 
[/patch-mvnsite-hadoop-common-project_hadoop-common.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6807/2/artifact/out/patch-mvnsite-hadoop-common-project_hadoop-common.txt)
 |  hadoop-common in the patch failed.  |
   | +1 :green_heart: |  javadoc  |   4m 35s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  | 149m 58s |  |  patch has no errors 
when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  asflicense  |   5m 19s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 471m 10s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | GITHUB PR | https://github.com/apache/hadoop/pull/6807 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
   | uname | MINGW64_NT-10.0-17763 a388fdfcc139 3.4.10-87d57229.x86_64 
2024-02-14 20:17 UTC x86_64 Msys |
   | Build tool | maven |
   | Personality | /c/hadoop/dev-support/bin/hadoop.sh |
   | git revision | trunk / cbd328a2a6aa1b7487409e6620451e91c0e0ae53 |
   | Default Java | Azul Systems, Inc.-1.8.0_332-b09 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6807/2/testReport/
 |
   | modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6807/2/console
 |
   | versions | git=2.44.0.windows.1 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> Change of Codec configuration does not work
> -------------------------------------------
>
>                 Key: HADOOP-19167
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19167
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: compress
>            Reporter: Zhikai Hu
>            Priority: Minor
>              Labels: pull-request-available
>
> In one of my projects, I need to dynamically adjust compression level for 
> different files. 
> However, I found that in most cases the new compression level does not take 
> effect as expected, the old compression level continues to be used.
> Here is the relevant code snippet:
> ZStandardCodec zStandardCodec = new ZStandardCodec();
> zStandardCodec.setConf(conf);
> conf.set("io.compression.codec.zstd.level", "5"); // level may change 
> dynamically
> conf.set("io.compression.codec.zstd", zStandardCodec.getClass().getName());
> writer = SequenceFile.createWriter(conf, 
> SequenceFile.Writer.file(sequenceFilePath),
>                                 
> SequenceFile.Writer.keyClass(LongWritable.class),
>                                 
> SequenceFile.Writer.valueClass(BytesWritable.class),
>                                 
> SequenceFile.Writer.compression(CompressionType.BLOCK));
> The reason is SequenceFile.Writer.init() method will call 
> CodecPool.getCompressor(codec, null) to get a compressor. 
> If the compressor is a reused instance, the conf is not applied because it is 
> passed as null:
> public static Compressor getCompressor(CompressionCodec codec, Configuration 
> conf) {
> Compressor compressor = borrow(compressorPool, codec.getCompressorType());
> if (compressor == null)
> { compressor = codec.createCompressor(); LOG.info("Got brand-new compressor 
> ["+codec.getDefaultExtension()+"]"); }
> else {
> compressor.reinit(conf);   //conf is null here
> ......
>  
> Please also refer to my unit test to reproduce the bug. 
> To address this bug, I modified the code to ensure that the configuration is 
> read back from the codec when a compressor is reused.



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