Manoj Govindassamy created HDFS-11340:
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Summary: DataNode reconfigure for disks doesn't remove the failed
volumes
Key: HDFS-11340
URL: https://issues.apache.org/jira/browse/HDFS-11340
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 3.0.0-alpha1
Reporter: Manoj Govindassamy
Assignee: Manoj Govindassamy
Say a DataNode (uuid:xyz) has disks D1 and D2. When D1 turns bad, JMX query on
FSDatasetState-xyz for "NumFailedVolumes" attr rightly shows the failed volume
count as 1 and the "FailedStorageLocations" attr has the failed storage
location as "D1".
It is possible to add or remove disks to this DataNode by running
{{reconfigure}} command. Let the failed disk D1 be removed from the conf and
the new conf has only one good disk D2. Upon running the reconfigure command
for this DataNode with this new disk conf, the expectation is DataNode would no
more have "NumFailedVolumes" or "FailedStorageLocations". But, even after
removing the failed disk from the conf and a successful reconfigure, DataNode
continues to show the "NumFailedVolumes" as 1 and "FailedStorageLocations" as
"D1" and it never gets reset.
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