HDFS-9942. Add an HTrace span when refreshing the groups for a username (cmccabe)
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@ -27,6 +27,8 @@ import java.util.Set;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.TimeUnit;
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import org.apache.htrace.core.TraceScope;
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import org.apache.htrace.core.Tracer;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Ticker;
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import com.google.common.cache.CacheBuilder;
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@ -217,7 +219,20 @@ public class Groups {
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*/
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@Override
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public List<String> load(String user) throws Exception {
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List<String> groups = fetchGroupList(user);
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TraceScope scope = null;
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Tracer tracer = Tracer.curThreadTracer();
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if (tracer != null) {
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scope = tracer.newScope("Groups#fetchGroupList");
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scope.addKVAnnotation("user", user);
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}
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List<String> groups = null;
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try {
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groups = fetchGroupList(user);
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} finally {
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if (scope != null) {
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scope.close();
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}
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}
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if (groups.isEmpty()) {
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if (isNegativeCacheEnabled()) {
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