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https://issues.apache.org/jira/browse/HADOOP-18671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17718652#comment-17718652
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ASF GitHub Bot commented on HADOOP-18671:
-----------------------------------------
taklwu commented on PR #5553:
URL: https://github.com/apache/hadoop/pull/5553#issuecomment-1531834334
the failure tests should not be related, ping @steveloughran for another
look
```
[ERROR] Failures:
[ERROR]
org.apache.hadoop.hdfs.server.datanode.TestDirectoryScanner.testThrottling(org.apache.hadoop.hdfs.server.datanode.TestDirectoryScanner)
[ERROR] Run 1: TestDirectoryScanner.testThrottling:795 Throttle is too
permissive
[ERROR] Run 2: TestDirectoryScanner.testThrottling:795 Throttle is too
permissive
[ERROR] Run 3: TestDirectoryScanner.testThrottling:795 Throttle is too
permissive
```
> 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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