Lantao Jin created HADOOP-14492:
-----------------------------------
Summary: RpcDetailedMetrics and NameNodeMetrics use different rate
metrics abstraction cause the Xavgtime confused
Key: HADOOP-14492
URL: https://issues.apache.org/jira/browse/HADOOP-14492
Project: Hadoop Common
Issue Type: Bug
Components: metrics
Affects Versions: 2.8.0, 2.7.4
Reporter: Lantao Jin
Priority: Minor
For performance purpose,
[HADOOP-13782|https://issues.apache.org/jira/browse/HADOOP-13782] change the
metrics behaviour in {{RpcDetailedMetrics}}.
In 2.7.4:
{code}
public class RpcDetailedMetrics {
@Metric MutableRatesWithAggregation rates;
{code}
In old version:
{code}
public class RpcDetailedMetrics {
@Metric MutableRates rates;
{code}
But {{NameNodeMetrics}} still use {{MutableRate}} whatever in the new or old
version:
{code}
public class NameNodeMetrics {
@Metric("Block report") MutableRate blockReport;
{code}
It causes the metrics in JMX very different between them.
{quote}
{
name: "Hadoop:service=NameNode,name=RpcDetailedActivityForPort8030",
modelerType: "RpcDetailedActivityForPort8030",
tag.port: "8030",
tag.Context: "rpcdetailed",
...
BlockReportNumOps: 237634,
BlockReportAvgTime: 1382,
...
}
{
name: "Hadoop:service=NameNode,name=NameNodeActivity",
modelerType: "NameNodeActivity",
tag.ProcessName: "NameNode",
...
BlockReportNumOps: 2592932,
BlockReportAvgTime: 19.258064516129032,
...
}
{quote}
In the old version. They are correct.
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