Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/242#discussion_r110254199
--- Diff:
server/monitor/src/main/java/org/apache/accumulo/monitor/rest/tservers/TabletServerResource.java
---
@@ -0,0 +1,336 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.accumulo.monitor.rest.tservers;
+
+import java.lang.management.ManagementFactory;
+import java.security.MessageDigest;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response.Status;
+
+import org.apache.accumulo.core.Constants;
+import org.apache.accumulo.core.client.impl.ClientContext;
+import org.apache.accumulo.core.client.impl.Tables;
+import org.apache.accumulo.core.conf.Property;
+import org.apache.accumulo.core.data.impl.KeyExtent;
+import org.apache.accumulo.core.master.thrift.MasterMonitorInfo;
+import org.apache.accumulo.core.master.thrift.RecoveryStatus;
+import org.apache.accumulo.core.master.thrift.TabletServerStatus;
+import org.apache.accumulo.core.rpc.ThriftUtil;
+import org.apache.accumulo.core.tabletserver.thrift.ActionStats;
+import org.apache.accumulo.core.tabletserver.thrift.TabletClientService;
+import org.apache.accumulo.core.tabletserver.thrift.TabletStats;
+import org.apache.accumulo.core.trace.Tracer;
+import org.apache.accumulo.core.util.AddressUtil;
+import org.apache.accumulo.core.zookeeper.ZooUtil;
+import org.apache.accumulo.monitor.Monitor;
+import org.apache.accumulo.monitor.rest.master.MasterResource;
+import org.apache.accumulo.server.client.HdfsZooInstance;
+import org.apache.accumulo.server.master.state.DeadServerList;
+import org.apache.accumulo.server.util.ActionStatsUpdator;
+
+import com.google.common.net.HostAndPort;
+
+/**
+ *
+ * Generates tserver lists as JSON objects
+ *
+ * @since 2.0.0
+ *
+ */
+@Path("/tservers")
+@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+public class TabletServerResource {
+
+ // Variable names become JSON keys
+ private TabletStats total, historical;
+
+ /**
+ * Generates tserver summary
+ *
+ * @return tserver summary
+ */
+ @GET
+ public TabletServers getTserverSummary() {
+ MasterMonitorInfo mmi = Monitor.getMmi();
+ if (null == mmi) {
+ throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
+ }
+
+ TabletServers tserverInfo = new TabletServers(mmi.tServerInfo.size());
+ for (TabletServerStatus status : mmi.tServerInfo) {
+ tserverInfo.addTablet(new TabletServer(status));
+ }
+
+ tserverInfo.addBadTabletServer(new MasterResource().getTables());
+
+ return tserverInfo;
+ }
+
+ /**
+ * REST call to clear dead servers from list
+ *
+ * @param server
+ * Dead server to clear
+ */
+ @POST
+ @Consumes(MediaType.TEXT_PLAIN)
+ public void clearDeadServer(@QueryParam("server") String server) throws
Exception {
+ DeadServerList obit = new
DeadServerList(ZooUtil.getRoot(Monitor.getContext().getInstance()) +
Constants.ZDEADTSERVERS);
+ obit.delete(server);
+ }
+
+ /**
+ * Generates a recovery tserver list
+ *
+ * @return Recovery tserver list
+ */
+ @Path("recovery")
+ @GET
+ public Map<String,List<Map<String,String>>> getTserverRecovery() {
+
+ Map<String,List<Map<String,String>>> jsonObj = new
HashMap<String,List<Map<String,String>>>();
+ List<Map<String,String>> recoveryList = new ArrayList<>();
+ Map<String,String> recoveryObj = new HashMap<String,String>();
+
+ MasterMonitorInfo mmi = Monitor.getMmi();
+ if (null == mmi) {
+ throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
+ }
+
+ for (TabletServerStatus server : mmi.tServerInfo) {
+ if (server.logSorts != null) {
+ for (RecoveryStatus recovery : server.logSorts) {
+ recoveryObj.put("server", AddressUtil.parseAddress(server.name,
false).getHostText());
+ recoveryObj.put("log", recovery.name);
+ recoveryObj.put("time", Long.toString(recovery.runtime));
+ recoveryObj.put("copySort", Double.toString(recovery.progress));
+
+ recoveryList.add(recoveryObj);
+ }
+ }
+ }
+
+ jsonObj.put("recoveryList", recoveryList);
+
+ return jsonObj;
+ }
+
+ /**
+ * Generates details for the selected tserver
+ *
+ * @param tserverAddr
+ * TServer name
+ * @return TServer details
+ */
+ @Path("{address}")
+ @GET
+ public TabletServerSummary getTserverDetails(@PathParam("address")
String tserverAddr) throws Exception {
+
+ String tserverAddress = tserverAddr;
+
+ boolean tserverExists = false;
+ if (tserverAddress != null && tserverAddress.isEmpty() == false) {
+ for (TabletServerStatus ts : Monitor.getMmi().getTServerInfo()) {
+ if (tserverAddress.equals(ts.getName())) {
+ tserverExists = true;
+ break;
+ }
+ }
+ }
+
+ if (tserverAddress == null || tserverAddress.isEmpty() ||
tserverExists == false) {
+
+ return null;
+ }
+
+ double totalElapsedForAll = 0;
+ double splitStdDev = 0;
+ double minorStdDev = 0;
+ double minorQueueStdDev = 0;
+ double majorStdDev = 0;
+ double majorQueueStdDev = 0;
+ double currentMinorAvg = 0;
+ double currentMajorAvg = 0;
+ double currentMinorStdDev = 0;
+ double currentMajorStdDev = 0;
+ total = new TabletStats(null, new ActionStats(), new ActionStats(),
new ActionStats(), 0, 0, 0, 0);
+ HostAndPort address = HostAndPort.fromString(tserverAddress);
+ historical = new TabletStats(null, new ActionStats(), new
ActionStats(), new ActionStats(), 0, 0, 0, 0);
+ List<TabletStats> tsStats = new ArrayList<>();
+
+ try {
+ ClientContext context = Monitor.getContext();
+ TabletClientService.Client client = ThriftUtil.getClient(new
TabletClientService.Client.Factory(), address, context);
+ try {
+ for (String tableId : Monitor.getMmi().tableMap.keySet()) {
+ tsStats.addAll(client.getTabletStats(Tracer.traceInfo(),
context.rpcCreds(), tableId));
+ }
+ historical = client.getHistoricalStats(Tracer.traceInfo(),
context.rpcCreds());
+ } finally {
+ ThriftUtil.returnClient(client);
+ }
+ } catch (Exception e) {
+ return null;
+ }
+
+ List<CurrentOperations> currentOps = doCurrentOperations(tsStats);
+
+ if (total.minors.num != 0)
+ currentMinorAvg = (long) (total.minors.elapsed / total.minors.num);
+ if (total.minors.elapsed != 0 && total.minors.num != 0)
+ currentMinorStdDev = stddev(total.minors.elapsed, total.minors.num,
total.minors.sumDev);
+ if (total.majors.num != 0)
+ currentMajorAvg = total.majors.elapsed / total.majors.num;
+ if (total.majors.elapsed != 0 && total.majors.num != 0 &&
total.majors.elapsed > total.majors.num)
+ currentMajorStdDev = stddev(total.majors.elapsed, total.majors.num,
total.majors.sumDev);
+
+ ActionStatsUpdator.update(total.minors, historical.minors);
+ ActionStatsUpdator.update(total.majors, historical.majors);
+ totalElapsedForAll += total.majors.elapsed + historical.splits.elapsed
+ total.minors.elapsed;
+
+ minorStdDev = stddev(total.minors.elapsed, total.minors.num,
total.minors.sumDev);
+ minorQueueStdDev = stddev(total.minors.queueTime, total.minors.num,
total.minors.queueSumDev);
+ majorStdDev = stddev(total.majors.elapsed, total.majors.num,
total.majors.sumDev);
+ majorQueueStdDev = stddev(total.majors.queueTime, total.majors.num,
total.majors.queueSumDev);
+ splitStdDev = stddev(historical.splits.num, historical.splits.elapsed,
historical.splits.sumDev);
+
+ TabletServerDetailInformation details = doDetails(address,
tsStats.size());
+
+ List<AllTimeTabletResults> allTime =
doAllTimeResults(majorQueueStdDev, minorQueueStdDev, totalElapsedForAll,
splitStdDev, majorStdDev, minorStdDev);
+
+ CurrentTabletResults currentRes =
doCurrentTabletResults(currentMinorAvg, currentMinorStdDev, currentMajorAvg,
currentMajorStdDev);
+
+ TabletServerSummary tserverDetails = new TabletServerSummary(details,
allTime, currentRes, currentOps);
+
+ return tserverDetails;
+ }
+
+ private static final int concurrentScans =
Monitor.getContext().getConfiguration().getCount(Property.TSERV_READ_AHEAD_MAXCONCURRENT);
--- End diff --
Ah, yes this is static presently. Ignore...
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