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https://issues.apache.org/jira/browse/HADOOP-18671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17719566#comment-17719566
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ASF GitHub Bot commented on HADOOP-18671:
-----------------------------------------
jojochuang opened a new pull request, #5620:
URL: https://github.com/apache/hadoop/pull/5620
The HDFS lease APIs have been replicated as interfaces in hadoop-common so
other filesystems can also implement them. Applications which use the leasing
APIs should migrate to the new interface where possible.
Contributed by Stephen Wu
(cherry picked from commit 0e46388474f52cd38578d946c26ba762be05ef1f)
Conflicts:
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUpgrade.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestEncryptionZones.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestViewDistributedFileSystem.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImageWithAcl.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImageWithSnapshot.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeRetryCacheMetrics.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestFSImageWithOrderedSnapshotDeletion.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestOrderedSnapshotDeletion.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/TestOfflineImageViewer.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/TestOfflineImageViewerForErasureCodingPolicy.java
Change-Id: I2ccd0b6780a86610df61d8528e681db0451e2e4c (cherry picked from
commit 207972692aebd02adda0458fd85fc7e813396fc8)
Conflicts:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonPathCapabilities.java
hadoop-common-project/hadoop-common/src/site/markdown/filesystem/index.md
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/ViewDistributedFileSystem.java
hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java
hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpcSingleNS.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRollingUpgrade.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImage.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImageWithAcl.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestNNHealthCheck.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestXAttrWithSnapshot.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/TestOfflineImageViewer.java
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/TestOfflineImageViewerForStoragePolicy.java
Change-Id: Ieaa669eb43eb6c1b79b48ff862b438ae9611c08e
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> 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
> Assignee: Tak-Lon (Stephen) Wu
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> 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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