Improve RM WebApp start up when proxy address is not set
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Key: MAPREDUCE-4093
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4093
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mrv2
Affects Versions: 2.0.0, 3.0.0
Reporter: Devaraj K
{code:title=ResourceManager.java|borderStyle=solid}
protected void startWepApp() {
Builder<ApplicationMasterService> builder =
WebApps.$for("cluster", ApplicationMasterService.class, masterService,
"ws").at(
this.conf.get(YarnConfiguration.RM_WEBAPP_ADDRESS,
YarnConfiguration.DEFAULT_RM_WEBAPP_ADDRESS));
if(YarnConfiguration.getRMWebAppHostAndPort(conf).
equals(YarnConfiguration.getProxyHostAndPort(conf))) {
AppReportFetcher fetcher = new AppReportFetcher(conf,
getClientRMService());
builder.withServlet(ProxyUriUtils.PROXY_SERVLET_NAME,
ProxyUriUtils.PROXY_PATH_SPEC, WebAppProxyServlet.class);
builder.withAttribute(WebAppProxy.FETCHER_ATTRIBUTE, fetcher);
String proxy = YarnConfiguration.getProxyHostAndPort(conf);
String[] proxyParts = proxy.split(":");
builder.withAttribute(WebAppProxy.PROXY_HOST_ATTRIBUTE, proxyParts[0]);
}
webApp = builder.start(new RMWebApp(this));
}
{code}
In the above code, YarnConfiguration.getProxyHostAndPort(conf) is invoking
twice. getProxyHostAndPort() internally invokes getRMWebAppHostAndPort() which
resolves RM web app address when proxy address is not set.
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