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Type:
Sub-task
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Status: Resolved
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 3.0.0-alpha-1, 2.3.0
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Component/s: BlockCache
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Labels:None
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Hadoop Flags:Reviewed
After runing YCSB scan/get benchmark in our XiaoMi cluster, we found the get QPS dropped from 25000/s to hunderds per second in a cluster with five nodes.
After enable the debug log at YCSB client side, I found the following stacktrace , see https://issues.apache.org/jira/secure/attachment/12968745/image-2019-05-15-12-00-03-641.png.
After looking into the stractrace, I can ensure that the zero refCnt block is an intermedia index block, see [2] http://hbase.apache.org/images/hfilev2.png
Need a patch to fix this.
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