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https://issues.apache.org/jira/browse/HADOOP-14492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Lantao Jin updated HADOOP-14492:
--------------------------------
Description:
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.
was:
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.
> 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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