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https://issues.apache.org/jira/browse/HDDS-1843?focusedWorklogId=302862&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-302862
]
ASF GitHub Bot logged work on HDDS-1843:
----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Aug/19 14:00
Start Date: 28/Aug/19 14:00
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #1364:
HDDS-1843. Undetectable corruption after restart of a datanode.
URL: https://github.com/apache/hadoop/pull/1364#discussion_r318597402
##########
File path: hadoop-hdds/common/src/main/resources/audit.log
##########
@@ -0,0 +1,25 @@
+2019-08-28 11:36:31,489 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=CREATE_VOLUME {admin=sbanerjee, owner=sbanerjee,
volume=testcontainerstatemachinefailures, creationTime=1566972391485,
quotaInBytes=1152921504606846976} | ret=SUCCESS |
+2019-08-28 11:36:31,494 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=READ_VOLUME {volume=testcontainerstatemachinefailures} | ret=SUCCESS |
+2019-08-28 11:36:31,511 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=CREATE_BUCKET {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures, acls=[user:sbanerjee:a[ACCESS],
group:staff:a[ACCESS], group:everyone:a[ACCESS], group:localaccounts:a[ACCESS],
group:_appserverusr:a[ACCESS], group:admin:a[ACCESS],
group:_appserveradm:a[ACCESS], group:_lpadmin:a[ACCESS],
group:com.apple.sharepoint.group.2:a[ACCESS], group:_appstore:a[ACCESS],
group:_lpoperator:a[ACCESS], group:_developer:a[ACCESS],
group:_analyticsusers:a[ACCESS], group:com.apple.access_ftp:a[ACCESS],
group:com.apple.access_screensharing:a[ACCESS],
group:com.apple.access_ssh-disabled:a[ACCESS],
group:com.apple.sharepoint.group.1:a[ACCESS]], isVersionEnabled=false,
storageType=DISK, creationTime=0} | ret=SUCCESS |
+2019-08-28 11:36:31,515 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=READ_VOLUME {volume=testcontainerstatemachinefailures} | ret=SUCCESS |
+2019-08-28 11:36:31,519 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=READ_BUCKET {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures} | ret=SUCCESS |
+2019-08-28 11:36:31,561 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=ALLOCATE_KEY {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures, key=ratis, dataSize=1024,
replicationType=RATIS, replicationFactor=ONE, keyLocationInfo=null} |
ret=SUCCESS |
+2019-08-28 11:36:37,850 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=COMMIT_KEY {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures, key=ratis, dataSize=10,
replicationType=null, replicationFactor=null,
keyLocationInfo=[{blockID={containerID=1, localID=102693102652358657},
length=10, offset=0, token=null, pipeline=Pipeline[ Id:
33e5321e-9d61-4d31-94ca-a18a6abc80ba, Nodes:
82c96fdc-06f5-47f4-ab5d-7a2fa599b46e{ip: 192.168.0.64, host: 192.168.0.64,
networkLocation: /default-rack, certSerialId: null}, Type:RATIS, Factor:ONE,
State:OPEN], createVersion=0}], clientID=102693102651244544} | ret=SUCCESS |
+2019-08-28 11:36:50,166 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=READ_VOLUME {volume=testcontainerstatemachinefailures} | ret=SUCCESS |
+2019-08-28 11:36:50,168 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=READ_BUCKET {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures} | ret=SUCCESS |
+2019-08-28 11:36:50,177 | INFO | OMAudit | user=sbanerjee | ip=127.0.0.1 |
op=ALLOCATE_KEY {volume=testcontainerstatemachinefailures,
bucket=testcontainerstatemachinefailures, key=ratis, dataSize=1024,
replicationType=RATIS, replicationFactor=ONE, keyLocationInfo=null} |
ret=SUCCESS |
Review comment:
whitespace:end of line
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Issue Time Tracking
-------------------
Worklog Id: (was: 302862)
Time Spent: 20m (was: 10m)
> Undetectable corruption after restart of a datanode
> ---------------------------------------------------
>
> Key: HDDS-1843
> URL: https://issues.apache.org/jira/browse/HDDS-1843
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.5.0
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Critical
> Labels: pull-request-available
> Fix For: 0.5.0
>
> Attachments: HDDS-1843.000.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Right now, all write chunks use BufferedIO ie, sync flag is disabled by
> default. Also, Rocks Db metadata updates are done in Rocks DB cache first at
> Datanode. In case, there comes a situation where the buffered chunk data as
> well as the corresponding metadata update is lost as a part of datanode
> restart, it may lead to a situation where, it will not be possible to detect
> the corruption (not even with container scanner) of this nature in a
> reasonable time frame, until and unless there is a client IO failure or Recon
> server detects it over time. In order to atleast to detect the problem, Ratis
> snapshot on datanode should sync the rocks db file . In such a way,
> ContainerScanner will be able to detect this.We can also add a metric around
> sync to measure how much of a throughput loss it can incurr.
> Thanks [~msingh] for suggesting this.
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