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https://issues.apache.org/jira/browse/HDFS-8077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14486124#comment-14486124
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Jing Zhao commented on HDFS-8077:
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The bug is caused by the change in HDFS-7907. In HDFS-7907, we add a new field
{{corrupted}} in {{BlockToMarkCorrupt}}, then in {{checkReplicaCorrupt}} we
simply use the parameter "reported" to construct the {{BlockToMarkCorrupt}}
object. However, this reported object is actually a reused block object (see
{{BlockListAsLongs#iterator}}) and we keep modifying the block during the
report process. Therefore we should make a copy the block and use it for
{{BlockToMarkCorrupt}} construction.
> Erasure coding: fix bug in EC zone and symlinks
> -----------------------------------------------
>
> Key: HDFS-8077
> URL: https://issues.apache.org/jira/browse/HDFS-8077
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: Jing Zhao
> Attachments: HDFS-8077-000.patch, HDFS-8077.001.patch
>
>
> EC zone manager tries to get XAttr of an inode to determine the EC policy,
> which doesn't work with symlinks. This patch has a simple fix to get rid of
> test failures.
> Ideally we should also add logic to disallow creating symlinks in several
> EC-related scenarios. But since symlinks are disabled in branch-2 and will
> likely be disabled in trunk, this step is skipped now.
> The patch also fixes a small test error around {{getBlockReplication}}
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