Shuyan Zhang created HDFS-17190:
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Summary: EC: Fix bug for OIV processing XAttr.
Key: HDFS-17190
URL: https://issues.apache.org/jira/browse/HDFS-17190
Project: Hadoop HDFS
Issue Type: Bug
Environment: When we need to use OIV to print EC information for a
directory, `PBImageTextWriter#getErasureCodingPolicyName` will be called.
Currently, this method uses
`XATTR_ERASURECODING_POLICY.contains(xattr.getName())` to filter and obtain EC
XAttr, which is very dangerous. If we have an XAttr whose name happens to be a
substring of `hdfs.erasurecoding.policy`, then `getErasureCodingPolicyName`
will return the wrong result. Our internal production environment has
customized some XAttrs, and this bug caused errors in the parsing results of
OIV when using `-ec` option.
Reporter: Shuyan Zhang
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