/**
*
* 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.fserver;
import com.alibaba.wasp.monitoring.StateDumpServlet;
import org.apache.hadoop.classification.InterfaceAudience;
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;
@InterfaceAudience.Private
public class FSDumpServlet extends StateDumpServlet {
private static final long serialVersionUID = 1L;
private static final String LINE =
"===========================================================";
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException {
FServer fs = (FServer)getServletContext().getAttribute(
FServer.FSERVER);
assert fs != null : "No FS in context!";
Configuration hrsconf = (Configuration)getServletContext().getAttribute(
FServer.FSERVER_CONF);
assert hrsconf != null : "No FS conf in context";
response.setContentType("text/plain");
OutputStream os = response.getOutputStream();
PrintWriter out = new PrintWriter(os);
out.println("Master status for " + fs.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\nExecutors:");
out.println(LINE);
dumpExecutors(fs.getExecutorService(), out);
out.println("\n\nStacks:");
out.println(LINE);
ReflectionUtils.printThreadInfo(out, "");
out.println("\n\nFS Configuration:");
out.println(LINE);
Configuration conf = fs.getConfiguration();
out.flush();
conf.writeXml(os);
os.flush();
out.println("\n\nLogs");
out.println(LINE);
long tailKb = getTailKbParam(request);
LogMonitoring.dumpTailOfLogs(out, tailKb);
out.println("\n\nFS Queue:");
out.println(LINE);
if(isShowQueueDump(hrsconf)) {
dumpQueue(fs, out);
}
out.flush();
}
private boolean isShowQueueDump(Configuration conf){
return conf.getBoolean("wasp.fserver.servlet.show.queuedump", true);
}
private void dumpQueue(FServer fs, PrintWriter out)
throws IOException {
// 1. Print out Compaction/Split Queue
out.println("Split Queue summary: "
+ fs.splitThread.toString() );
out.println(fs.splitThread.dumpQueue());
}
}