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https://issues.apache.org/jira/browse/HDFS-8460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557115#comment-14557115
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Walter Su commented on HDFS-8460:
---------------------------------
*Causes*
{code:title=DFSTestUtil.java}
1910 public static Block addStripedBlockToFile(List<DataNode> dataNodes,
...
1926 DatanodeStorage storage = new
DatanodeStorage(UUID.randomUUID().toString());
{code}
If DN itself sends a blockreport, the storage with randomUUID will be
considered zombie and be removed.
*reproduce problem*
{code}
DFSTestUtil.createStripedFile(cluster, filePath, null, numBlocks,
NUM_STRIPE_PER_BLOCK, false);
+ cluster.triggerHeartbeats();
LocatedBlocks lbs =
fs.getClient().namenode.getBlockLocations(filePath.toString(), 0, fileSize);
{code}
> Erasure Coding: stateful read result doesn't match data occasionally
> --------------------------------------------------------------------
>
> Key: HDFS-8460
> URL: https://issues.apache.org/jira/browse/HDFS-8460
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Yi Liu
> Assignee: Walter Su
> Attachments: HDFS-8460-HDFS-7285.001.patch
>
>
> I found this issue in TestDFSStripedInputStream, {{testStatefulRead}} failed
> occasionally shows that read result doesn't match data written.
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