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https://issues.apache.org/jira/browse/HDFS-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suresh Srinivas updated HDFS-1218:
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Attachment: HDFS-1218.20s.2.patch
Patch ported to 0.20-security.
TestFileAppend4#testFullClusterPowerLoss() fails in this patch. The test
involves lease recovery post DN restart, triggered by append. Since DN ipc
ports change between restarts and NN does not update the IPC port for the DNs
upon re-registration, the lease recovery uses ipc port from the previous
registration. This results in RPC failure and the test failure.
I have change DatanodeID#updateRegInfo() to update ipc port along with other
fields.
> 20 append: Blocks recovered on startup should be treated with lower priority
> during block synchronization
> ---------------------------------------------------------------------------------------------------------
>
> Key: HDFS-1218
> URL: https://issues.apache.org/jira/browse/HDFS-1218
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.20-append
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.20-append
>
> Attachments: HDFS-1218.20s.2.patch, hdfs-1281.txt
>
>
> When a datanode experiences power loss, it can come back up with truncated
> replicas (due to local FS journal replay). Those replicas should not be
> allowed to truncate the block during block synchronization if there are other
> replicas from DNs that have _not_ restarted.
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