Major Description
kozdemir introduced phoenix paging feature. If hbase regionserver is busy scanning hfiles and if paging timeout occurs, it will send a dummy row and phoenix client will ignore that dummy row. We can add a metric on the server side and/or on the client side indicating how many dummy rows the server sent or a client encountered. This will show us interesting insights. We can determine if just one particular server is unhealthy? Are we seeing paging timeouts just for 1 table and so on.
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