amahussein commented on a change in pull request #2408:
URL: https://github.com/apache/hadoop/pull/2408#discussion_r513584215
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File path:
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileChecksum.java
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@@ -575,6 +596,8 @@ private FileChecksum getFileChecksum(String filePath, int
range,
dnIdxToDie = getDataNodeToKill(filePath);
DataNode dnToDie = cluster.getDataNodes().get(dnIdxToDie);
shutdownDataNode(dnToDie);
+ // wait enough time for the locations to be updated.
+ Thread.sleep(STALE_INTERVAL);
Review comment:
I see. the problem is that I cannot reproduce it on my local machine.
However, it seems that it fails in a consistent way on Yetus.
If it is not a real bug, I wonder if volumeScanner could be a factor in
randomly slowing down the DNs. I see many log message from the volume scanner
when I run locally.
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