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https://issues.apache.org/jira/browse/HADOOP-18671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17712128#comment-17712128
 ] 

ASF GitHub Bot commented on HADOOP-18671:
-----------------------------------------

hadoop-yetus commented on PR #5553:
URL: https://github.com/apache/hadoop/pull/5553#issuecomment-1507741350

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1  |
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[/results-compile-javac-root-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/results-compile-javac-root-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt)
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[/results-compile-javac-root-jdkPrivateBuild-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/results-compile-javac-root-jdkPrivateBuild-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09.txt)
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Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09 generated 232 new + 2619 
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[/results-checkstyle-root.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/results-checkstyle-root.txt)
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[/results-javadoc-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/results-javadoc-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1.txt)
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hadoop-common-project_hadoop-common-jdkUbuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1
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[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
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   |  |   | 508m 41s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | 
hadoop.fs.viewfs.TestViewFileSystemOverloadSchemeHdfsFileSystemContract |
   
   
   | Subsystem | Report/Notes |
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/5553 |
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   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/testReport/ |
   | Max. process+thread count | 2106 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs 
hadoop-tools/hadoop-aws hadoop-tools/hadoop-azure U: . |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5553/1/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> Add recoverLease(), setSafeMode(), isFileClosed() APIs to FileSystem
> --------------------------------------------------------------------
>
>                 Key: HADOOP-18671
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18671
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs
>            Reporter: Wei-Chiu Chuang
>            Priority: Major
>              Labels: pull-request-available
>
> We are in the midst of enabling HBase and Solr to run on Ozone.
> An obstacle is that HBase relies heavily on HDFS APIs and semantics for its 
> Write Ahead Log (WAL) file (similarly, for Solr's transaction log). We 
> propose to push up these HDFS APIs, i.e. recoverLease(), setSafeMode(), 
> isFileClosed() to FileSystem abstraction so that HBase and other applications 
> do not need to take on Ozone dependency at compile time. This work will 
> (hopefully) enable HBase to run on other storage system implementations in 
> the future.
> There are other HDFS features that HBase uses, including hedged read and 
> favored nodes. Those are FS-specific optimizations and are not critical to 
> enable HBase on Ozone.



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