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From "Zhihong Yu (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5283) Request counters may become negative for heavily loaded regions
Date Thu, 26 Jan 2012 17:32:38 GMT
Request counters may become negative for heavily loaded regions

                 Key: HBASE-5283
                 URL: https://issues.apache.org/jira/browse/HBASE-5283
             Project: HBase
          Issue Type: Bug
            Reporter: Zhihong Yu

Requests counter showing negative count, example under 'Requests' column: -645470239
Name	Region Server	Start Key	End Key	Requests
usertable,user2037516127892189021,1326756873774.16833e4566d1daef109b8fdcd1f4b5a6. 	xxx.com:60030
	user2037516127892189021 	user2296868939942738705 	-645470239
RegionLoad.readRequestsCount and RegionLoad.writeRequestsCount are of int type. Our Ops has
been running lots of heavy load operation. RegionLoad.getRequestsCount() overflows int.MAX_VALUE.
It is set to D986E7E1. In table.jsp, RegionLoad.getRequestsCount() is assigned to long type.
D986E7E1 is converted to long FFFFFFFFD986E7E1 which is -645470239 in decimal.

Suggested fix is to make readRequestsCount and writeRequestsCount long type. 

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