Github user billoley commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/291#discussion_r132674187
--- Diff:
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")) {
--- End diff --
This was an attempt to not tie the code to a specifc property. It's
probably better to just use the property. I can't just pass all of the
properties to the metrics system and defer the decision. I'm creating a
specific tag "ProcessName" that is used by the MetricsRegistry and metrics2
sinks. We are using the -Daccumulo.service.instance to deconflict the log file
names (this is why the _ is added to the instance) and to correlate a running
process to the logs. I'm trying to make it easy to montor the long-running
tserver processes by using well-named metrics that also correlate to the
running process and the log file with the same instance (1, 2, 3, etc). Since
this is only a concern for the tservers, I could grab this property closer to
the top of the call chain (TabletServer.main()) if that would be more
acceptable.
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