Rajesh Balamohan created YARN-3797:
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Summary: NodeManager not blacklisting the disk (shuffle) with
errors
Key: YARN-3797
URL: https://issues.apache.org/jira/browse/YARN-3797
Project: Hadoop YARN
Issue Type: Bug
Reporter: Rajesh Balamohan
In a multi-node environment, one of the disk (where map outputs are written) in
a node went bad. Errors are given below.
{noformat}
Info fld=0x9ad090a
sd 6:0:5:0: [sdf] Add. Sense: Unrecovered read error
sd 6:0:5:0: [sdf] CDB: Read(10): 28 00 09 ad 09 08 00 00 08 00
end_request: critical medium error, dev sdf, sector 162334984
mpt2sas0: log_info(0x31080000): originator(PL), code(0x08), sub_code(0x0000)
sd 6:0:5:0: [sdf] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 6:0:5:0: [sdf] Sense Key : Medium Error [current]
Info fld=0x9af8892
sd 6:0:5:0: [sdf] Add. Sense: Unrecovered read error
sd 6:0:5:0: [sdf] CDB: Read(10): 28 00 09 af 88 90 00 00 08 00
end_request: critical medium error, dev sdf, sector 162498704
mpt2sas0: log_info(0x31080000): originator(PL), code(0x08), sub_code(0x0000)
mpt2sas0: log_info(0x31080000): originator(PL), code(0x08), sub_code(0x0000)
sd 6:0:5:0: [sdf] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sd 6:0:5:0: [sdf] Sense Key : Medium Error [current]
Info fld=0x9af8892
sd 6:0:5:0: [sdf] Add. Sense: Unrecovered read error
sd 6:0:5:0: [sdf] CDB: Read(10): 28 00 09 af 88 90 00 00 08 00
end_request: critical medium error, dev sdf, sector 162498704
{noformat}
Diskchecker would pass as the system allows to create directories and delete
directories without issues. But data being served out can be corrupt and
fetchers fail during CRC verification with unwanted delays and retries.
Ideally node manager should detect such errors and blacklist/remove those disks
from NM.
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