/**
* Copyright 2011 The Apache Software Foundation
*
* 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 com.alibaba.wasp.master;
import com.alibaba.wasp.ServerLoad;
import com.alibaba.wasp.ServerName;
import com.alibaba.wasp.monitoring.StateDumpServlet;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.monitoring.LogMonitoring;
import org.apache.hadoop.hbase.monitoring.TaskMonitor;
import org.apache.hadoop.util.ReflectionUtils;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Map;
public class FMasterDumpServlet extends StateDumpServlet {
private static final long serialVersionUID = 1L;
private static final String LINE =
"===========================================================";
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException {
FMaster master = (FMaster) getServletContext().getAttribute(FMaster.MASTER);
assert master != null : "No Master in context!";
response.setContentType("text/plain");
OutputStream os = response.getOutputStream();
PrintWriter out = new PrintWriter(os);
out.println("Master status for " + master.getServerName()
+ " as of " + new Date());
out.println("\n\nVersion Info:");
out.println(LINE);
dumpVersionInfo(out);
out.println("\n\nTasks:");
out.println(LINE);
TaskMonitor.get().dumpAsText(out);
out.println("\n\nServers:");
out.println(LINE);
dumpServers(master, out);
out.println("\n\nEntityGroups-in-transition:");
out.println(LINE);
dumpRIT(master, out);
out.println("\n\nExecutors:");
out.println(LINE);
dumpExecutors(master.getExecutorService(), out);
out.println("\n\nStacks:");
out.println(LINE);
ReflectionUtils.printThreadInfo(out, "");
out.println("\n\nMaster configuration:");
out.println(LINE);
Configuration conf = master.getConfiguration();
out.flush();
conf.writeXml(os);
os.flush();
// out.println("\n\nRecent fserver aborts:");
// out.println(LINE);
// master.getFServerFatalLogBuffer().dumpTo(out);
out.println("\n\nLogs");
out.println(LINE);
long tailKb = getTailKbParam(request);
LogMonitoring.dumpTailOfLogs(out, tailKb);
out.flush();
}
private void dumpRIT(FMaster master, PrintWriter out) {
Map<String, EntityGroupState> entityGroupsInTransition =
master.getAssignmentManager().getEntityGroupStates().getEntityGroupsInTransition();
for (Map.Entry<String, EntityGroupState> e : entityGroupsInTransition.entrySet()) {
String rid = e.getKey();
EntityGroupState entityGroupState = e.getValue();
out.println("EntityGroup " + rid + ": " + entityGroupState.toDescriptiveString());
}
}
private void dumpServers(FMaster master, PrintWriter out) {
Map<ServerName, ServerLoad> servers =
master.getFServerManager().getOnlineServers();
for (Map.Entry<ServerName, ServerLoad> e : servers.entrySet()) {
out.println(e.getKey() + ": " + e.getValue());
}
}
}