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https://issues.apache.org/jira/browse/HDFS-17068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17742467#comment-17742467
]
ASF GitHub Bot commented on HDFS-17068:
---------------------------------------
ayushtkn commented on code in PR #5809:
URL: https://github.com/apache/hadoop/pull/5809#discussion_r1261357967
##########
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDirectoryScanner.java:
##########
@@ -1304,6 +1305,23 @@ public void testLocalReplicaUpdateWithReplica() throws
Exception {
assertEquals(realBlkFile, localReplica.getBlockFile());
}
+ @Test(timeout = 60000)
+ public void testLastDirScannerFinishTimeIsUpdated() throws Exception {
+ Configuration conf = getConfiguration();
+ conf.setLong(DFSConfigKeys.DFS_DATANODE_DIRECTORYSCAN_INTERVAL_KEY, 3L);
+ cluster = new MiniDFSCluster.Builder(conf).build();
+ try {
+ cluster.waitActive();
+ bpid = cluster.getNamesystem().getBlockPoolId();
+ fds = DataNodeTestUtils.getFSDataset(cluster.getDataNodes().get(0));
+ assertEquals(fds.getLastDirScannerFinishTime(), 0L);
+ Thread.sleep(4000);
+ assertNotEquals(0L, fds.getLastDirScannerFinishTime());
+ } finally {
+ cluster.shutdown();
+ }
+ }
+
Review Comment:
can we rather than doing this sleep thing, have a test like this
```
@Test(timeout = 60000)
public void testLastDirScannerFinishTimeIsUpdated() throws Exception {
Configuration conf = getConfiguration();
cluster = new MiniDFSCluster.Builder(conf).build();
try {
cluster.waitActive();
bpid = cluster.getNamesystem().getBlockPoolId();
final DataNode dn = cluster.getDataNodes().get(0);
fds = DataNodeTestUtils.getFSDataset(dn);
long lastDirScannerFinishTime = fds.getLastDirScannerFinishTime();
dn.getDirectoryScanner().run();
assertNotEquals(lastDirScannerFinishTime,
fds.getLastDirScannerFinishTime());
} finally {
cluster.shutdown();
}
}
```
> Datanode should record last directory scan time.
> ------------------------------------------------
>
> Key: HDFS-17068
> URL: https://issues.apache.org/jira/browse/HDFS-17068
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Minor
> Labels: pull-request-available
>
> I think it is useful for us to record last directory scan time for one
> datanode.
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