Request counters may become negative for heavily loaded regions
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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
{code}
Name Region Server Start Key End Key Requests
usertable,user2037516127892189021,1326756873774.16833e4566d1daef109b8fdcd1f4b5a6.
xxx.com:60030 user2037516127892189021 user2296868939942738705
-645470239
{code}
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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