billoley commented on a change in pull request #291: ACCUMULO-4693: Add
instance-specific ProcessName to Hadoop2 metrics
URL: https://github.com/apache/accumulo/pull/291#discussion_r136417788
##########
File path:
server/base/src/main/java/org/apache/accumulo/server/metrics/MetricsSystemHelper.java
##########
@@ -16,20 +16,65 @@
*/
package org.apache.accumulo.server.metrics;
+import java.util.HashMap;
+import java.util.Map;
+
import org.apache.hadoop.metrics2.MetricsSystem;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
+import org.apache.hadoop.metrics2.source.JvmMetrics;
+import org.apache.hadoop.metrics2.source.JvmMetricsInfo;
/**
*
*/
public class MetricsSystemHelper {
+ private static Map<String,String> serviceNameMap = new HashMap<>();
+ private static String processName = "Unknown";
+
+ static {
+ serviceNameMap.put("master", "Master");
+ serviceNameMap.put("tserver", "TabletServer");
+ serviceNameMap.put("monitor", "Monitor");
+ serviceNameMap.put("gc", "GarbageCollector");
+ serviceNameMap.put("tracer", "Tracer");
+ serviceNameMap.put("shell", "Shell");
+ }
+
+ public static void configure(String application) {
+ String serviceName = application;
+ if (MetricsSystemHelper.serviceNameMap.containsKey(application)) {
+ serviceName = MetricsSystemHelper.serviceNameMap.get(application);
+ }
+
+ // a system property containing 'instance' can be used if more than one
TabletServer is started on a host
+ String serviceInstance = "";
+ if (serviceName.equals("TabletServer")) {
+ for (Map.Entry<Object,Object> p : System.getProperties().entrySet()) {
+ if (((String) p.getKey()).contains("instance")) {
+ // get rid of all non-alphanumeric characters and then prefix with a
-
+ serviceInstance = "-" + ((String)
p.getValue()).replaceAll("[^a-zA-Z0-9]", "");
Review comment:
I like making the accumulo.service.instance just a number instead of 1_, 2_,
3_, since it can be used for other things (metrics) without parsing. The
reason for the _ is three entries in generic_logger.xml. I propose that when
-Daccumulo.service.instance=X is defined, we also add -Dinstance.sep=_ (or some
other named property) right next to it. generic_logger.xml can use both of
these properties. This part of the launch script would only be linked with the
logging config and not the code. A slight downside is another property on the
command line. Log4j2 would provide several options to avoid this (scripting,
environment variables), but we're still on Log4j1.2.
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