Details
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Improvement
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Status: Resolved
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Minor
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Resolution: Fixed
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None
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Reviewed
Description
In BlockReceiver, right now when there is slowness in writeToMirror, writeToDisk and writeToOsCache, it is dumped in the debug log. In practice we have found these are quite useful signal to detect issues in DataNode, so it will be great these metrics can be exposed by JMX.
Also we introduced totalPacket received to use a percentage as a signal to detect the potentially underperforming datanode since datanodes across one HDFS cluster may received different numbers of packets totally.
Attachments
Issue Links
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1.
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Add metrics for slow DataNode |
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Resolved | Renukaprasad C |
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