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https://issues.apache.org/jira/browse/HDFS-13612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fang-Yu Rao reassigned HDFS-13612:
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Assignee: Fang-Yu Rao
> Short-circuit read: unknown response code ERROR
> -----------------------------------------------
>
> Key: HDFS-13612
> URL: https://issues.apache.org/jira/browse/HDFS-13612
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.6.0
> Environment: CDH5.13.3, Kerberized, HBase, hedged reader, short
> circuit read.
> Reporter: Wei-Chiu Chuang
> Assignee: Fang-Yu Rao
> Priority: Major
>
> Found the following warning in a HBase RS log:
> 2018-05-19 13:13:00,310 WARN org.apache.hadoop.hdfs.BlockReaderFactory:
> BlockReaderFactory(fileName=<REDACTED>,
> block=BP-297993939-10.0.0.1-1402080332426:blk_1816287870_744594480): unknown
> response code ERROR while attempting to set up short-circuit access. Block
> BP-297993939-10.0.0.1-1402080332426:blk_1816287870_744594480 is not valid
> Checking the code, if the request fails because of block access token
> (invalid access token), BlockReaderFactory#requestFileDescriptors expects
> error code ERROR_ACCESS_TOKEN. However, on the DataNode side,
> DataXceiver#requestShortCircuitFds emits ERROR if an IOException is thrown.
> So ERROR is expected and BlockReaderFactory#requestFileDescriptors should
> handle it better.
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