tianhang tang created HDFS-15822:
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Summary: Client retry mechanism may invalid when use hedgedRead
Key: HDFS-15822
URL: https://issues.apache.org/jira/browse/HDFS-15822
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Reporter: tianhang tang
Hedgedread uses ignoreNodes to ensure that multiple requests fall on different
nodes. But the ignoreNodes never been cleared. So if the request of 1st round
all failed, and the refetched location is not changed, HDFS client would not
request the same nodes which are in the ignoreNodes. It just sleep time by time
until reach the retry num, then throw a exception.
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