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HBASE-12665 When aborting, dump metrics 

Add some fixup of checkstyle fails
This commit is contained in:
stack 2014-12-09 21:01:15 -08:00
parent 9b808155e3
commit df22270756
6 changed files with 425 additions and 271 deletions
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3
hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
View File

@ -85,7 +85,8 @@ public class HColumnDescriptor implements Comparable<HColumnDescriptor> {
/**
* Key for cache data into L1 if cache is set up with more than one tier.
* To set in the shell, do something like this:
* <code>hbase(main):003:0> create 't', {NAME => 't', CONFIGURATION => {CACHE_DATA_IN_L1 => 'true'}}</code>
* <code>hbase(main):003:0> create 't',
* {NAME => 't', CONFIGURATION => {CACHE_DATA_IN_L1 => 'true'}}</code>
*/
public static final String CACHE_DATA_IN_L1 = "CACHE_DATA_IN_L1";

5
hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java
View File

@ -39,6 +39,11 @@ import org.apache.hadoop.security.UserGroupInformation;
@InterfaceStability.Evolving
public class AuthUtil {
private static final Log LOG = LogFactory.getLog(AuthUtil.class);
private AuthUtil() {
super();
}
/**
* Checks if security is enabled and if so, launches chore for refreshing kerberos ticket.
*/

286
hbase-server/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java
View File

@ -20,24 +20,11 @@ package org.apache.hadoop.hbase.http.jmx;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Array;
import java.util.Iterator;
import java.util.Set;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.IntrospectionException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.management.RuntimeMBeanException;
import javax.management.RuntimeErrorException;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.TabularData;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
@ -47,8 +34,7 @@ import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.http.HttpServer;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
import org.apache.hadoop.hbase.util.JSONBean;
/*
* This servlet is based off of the JMXProxyServlet from Tomcat 7.0.14. It has
@ -135,10 +121,8 @@ public class JMXJsonServlet extends HttpServlet {
*/
protected transient MBeanServer mBeanServer;
/**
* Json Factory to create Json generators for write objects in json format
*/
protected transient JsonFactory jsonFactory;
protected transient JSONBean jsonBeanWriter;
/**
* Initialize this servlet.
*/
@ -146,7 +130,7 @@ public class JMXJsonServlet extends HttpServlet {
public void init() throws ServletException {
// Retrieve the MBean server
mBeanServer = ManagementFactory.getPlatformMBeanServer();
jsonFactory = new JsonFactory();
this.jsonBeanWriter = new JSONBean();
}
/**
@ -163,11 +147,12 @@ public class JMXJsonServlet extends HttpServlet {
if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(), request, response)) {
return;
}
JsonGenerator jg = null;
String jsonpcb = null;
PrintWriter writer = null;
JSONBean.Writer beanWriter = null;
try {
writer = response.getWriter();
beanWriter = this.jsonBeanWriter.open(writer);
// "callback" parameter implies JSONP outpout
jsonpcb = request.getParameter(CALLBACK_PARAM);
@ -181,23 +166,22 @@ public class JMXJsonServlet extends HttpServlet {
String tmpStr = request.getParameter(INCLUDE_DESCRIPTION);
boolean description = tmpStr != null && tmpStr.length() > 0;
jg = jsonFactory.createJsonGenerator(writer);
jg.disable(JsonGenerator.Feature.AUTO_CLOSE_TARGET);
jg.useDefaultPrettyPrinter();
jg.writeStartObject();
// query per mbean attribute
String getmethod = request.getParameter("get");
if (getmethod != null) {
String[] splitStrings = getmethod.split("\\:\\:");
if (splitStrings.length != 2) {
jg.writeStringField("result", "ERROR");
jg.writeStringField("message", "query format is not as expected.");
jg.flush();
beanWriter.write("result", "ERROR");
beanWriter.write("message", "query format is not as expected.");
beanWriter.flush();
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
return;
}
listBeans(jg, new ObjectName(splitStrings[0]), splitStrings[1], description, response);
if (beanWriter.write(this.mBeanServer, new ObjectName(splitStrings[0]),
splitStrings[1], description) != 0) {
beanWriter.flush();
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
}
return;
}
@ -206,11 +190,12 @@ public class JMXJsonServlet extends HttpServlet {
if (qry == null) {
qry = "*:*";
}
listBeans(jg, new ObjectName(qry), null, description, response);
} finally {
if (jg != null) {
jg.close();
if (beanWriter.write(this.mBeanServer, new ObjectName(qry), null, description) != 0) {
beanWriter.flush();
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
}
} finally {
if (beanWriter != null) beanWriter.close();
if (jsonpcb != null) {
writer.write(");");
}
@ -226,237 +211,4 @@ public class JMXJsonServlet extends HttpServlet {
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
}
}
// --------------------------------------------------------- Private Methods
private void listBeans(JsonGenerator jg, ObjectName qry, String attribute,
final boolean description, final HttpServletResponse response)
throws IOException {
LOG.trace("Listing beans for "+qry);
Set<ObjectName> names = null;
names = mBeanServer.queryNames(qry, null);
jg.writeArrayFieldStart("beans");
Iterator<ObjectName> it = names.iterator();
while (it.hasNext()) {
ObjectName oname = it.next();
MBeanInfo minfo;
String code = "";
String descriptionStr = null;
Object attributeinfo = null;
try {
minfo = mBeanServer.getMBeanInfo(oname);
code = minfo.getClassName();
if (description) descriptionStr = minfo.getDescription();
String prs = "";
try {
if ("org.apache.commons.modeler.BaseModelMBean".equals(code)) {
prs = "modelerType";
code = (String) mBeanServer.getAttribute(oname, prs);
}
if (attribute != null) {
prs = attribute;
attributeinfo = mBeanServer.getAttribute(oname, prs);
}
} catch (RuntimeMBeanException e) {
// UnsupportedOperationExceptions happen in the normal course of business,
// so no need to log them as errors all the time.
if (e.getCause() instanceof UnsupportedOperationException) {
if (LOG.isTraceEnabled()) {
LOG.trace("Getting attribute " + prs + " of " + oname + " threw " + e);
}
} else {
LOG.error("Getting attribute " + prs + " of " + oname + " threw an exception", e);
}
return;
} catch (AttributeNotFoundException e) {
// If the modelerType attribute was not found, the class name is used
// instead.
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch (MBeanException e) {
// The code inside the attribute getter threw an exception so log it,
// and fall back on the class name
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch (RuntimeException e) {
// For some reason even with an MBeanException available to them
// Runtime exceptionscan still find their way through, so treat them
// the same as MBeanException
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch ( ReflectionException e ) {
// This happens when the code inside the JMX bean (setter?? from the
// java docs) threw an exception, so log it and fall back on the
// class name
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
}
} catch (InstanceNotFoundException e) {
//Ignored for some reason the bean was not found so don't output it
continue;
} catch ( IntrospectionException e ) {
// This is an internal error, something odd happened with reflection so
// log it and don't output the bean.
LOG.error("Problem while trying to process JMX query: " + qry
+ " with MBean " + oname, e);
continue;
} catch ( ReflectionException e ) {
// This happens when the code inside the JMX bean threw an exception, so
// log it and don't output the bean.
LOG.error("Problem while trying to process JMX query: " + qry
+ " with MBean " + oname, e);
continue;
}
jg.writeStartObject();
jg.writeStringField("name", oname.toString());
if (description && descriptionStr != null && descriptionStr.length() > 0) {
jg.writeStringField("description", descriptionStr);
}
jg.writeStringField("modelerType", code);
if (attribute != null && attributeinfo == null) {
jg.writeStringField("result", "ERROR");
jg.writeStringField("message", "No attribute with name " + attribute + " was found.");
jg.writeEndObject();
jg.writeEndArray();
jg.close();
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
return;
}
if (attribute != null) {
writeAttribute(jg, attribute, descriptionStr, attributeinfo);
} else {
MBeanAttributeInfo attrs[] = minfo.getAttributes();
for (int i = 0; i < attrs.length; i++) {
writeAttribute(jg, oname, description, attrs[i]);
}
}
jg.writeEndObject();
}
jg.writeEndArray();
}
private void writeAttribute(JsonGenerator jg, ObjectName oname, final boolean description,
MBeanAttributeInfo attr)
throws IOException {
if (!attr.isReadable()) {
return;
}
String attName = attr.getName();
if ("modelerType".equals(attName)) {
return;
}
if (attName.indexOf("=") >= 0 || attName.indexOf(":") >= 0 || attName.indexOf(" ") >= 0) {
return;
}
String descriptionStr = description? attr.getDescription(): null;
Object value = null;
try {
value = mBeanServer.getAttribute(oname, attName);
} catch (RuntimeMBeanException e) {
// UnsupportedOperationExceptions happen in the normal course of business,
// so no need to log them as errors all the time.
if (e.getCause() instanceof UnsupportedOperationException) {
if (LOG.isTraceEnabled()) {
LOG.trace("Getting attribute " + attName + " of " + oname + " threw " + e);
}
} else {
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
}
return;
} catch (RuntimeErrorException e) {
// RuntimeErrorException happens when an unexpected failure occurs in getAttribute
// for example https://issues.apache.org/jira/browse/DAEMON-120
LOG.debug("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (AttributeNotFoundException e) {
//Ignored the attribute was not found, which should never happen because the bean
//just told us that it has this attribute, but if this happens just don't output
//the attribute.
return;
} catch (MBeanException e) {
//The code inside the attribute getter threw an exception so log it, and
// skip outputting the attribute
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (RuntimeException e) {
//For some reason even with an MBeanException available to them Runtime exceptions
//can still find their way through, so treat them the same as MBeanException
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (ReflectionException e) {
//This happens when the code inside the JMX bean (setter?? from the java docs)
//threw an exception, so log it and skip outputting the attribute
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (InstanceNotFoundException e) {
//Ignored the mbean itself was not found, which should never happen because we
//just accessed it (perhaps something unregistered in-between) but if this
//happens just don't output the attribute.
return;
}
writeAttribute(jg, attName, descriptionStr, value);
}
private void writeAttribute(JsonGenerator jg, String attName, final String descriptionStr,
Object value)
throws IOException {
boolean description = false;
if (descriptionStr != null && descriptionStr.length() > 0 && !attName.equals(descriptionStr)) {
description = true;
jg.writeFieldName(attName);
jg.writeStartObject();
jg.writeFieldName("description");
jg.writeString(descriptionStr);
jg.writeFieldName("value");
writeObject(jg, description, value);
jg.writeEndObject();
} else {
jg.writeFieldName(attName);
writeObject(jg, description, value);
}
}
private void writeObject(JsonGenerator jg, final boolean description, Object value)
throws IOException {
if(value == null) {
jg.writeNull();
} else {
Class<?> c = value.getClass();
if (c.isArray()) {
jg.writeStartArray();
int len = Array.getLength(value);
for (int j = 0; j < len; j++) {
Object item = Array.get(value, j);
writeObject(jg, description, item);
}
jg.writeEndArray();
} else if(value instanceof Number) {
Number n = (Number)value;
jg.writeNumber(n.toString());
} else if(value instanceof Boolean) {
Boolean b = (Boolean)value;
jg.writeBoolean(b);
} else if(value instanceof CompositeData) {
CompositeData cds = (CompositeData)value;
CompositeType comp = cds.getCompositeType();
Set<String> keys = comp.keySet();
jg.writeStartObject();
for (String key: keys) {
writeAttribute(jg, key, null, cds.get(key));
}
jg.writeEndObject();
} else if(value instanceof TabularData) {
TabularData tds = (TabularData)value;
jg.writeStartArray();
for(Object entry : tds.values()) {
writeObject(jg, description, entry);
}
jg.writeEndArray();
} else {
jg.writeString(value.toString());
}
}
}
}

9
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
View File

@ -48,6 +48,7 @@ import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.net.InetAddress;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.servlet.http.HttpServlet;
@ -140,6 +141,7 @@ import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.HasThread;
import org.apache.hadoop.hbase.util.JSONBean;
import org.apache.hadoop.hbase.util.JvmPauseMonitor;
import org.apache.hadoop.hbase.util.Sleeper;
import org.apache.hadoop.hbase.util.Threads;
@ -1924,6 +1926,13 @@ public class HRegionServer extends HasThread implements
// java.util.HashSet's toString() method to print the coprocessor names.
LOG.fatal("RegionServer abort: loaded coprocessors are: " +
CoprocessorHost.getLoadedCoprocessors());
// Try and dump metrics if abort -- might give clue as to how fatal came about....
try {
LOG.info("Dump of metrics as JSON on abort: " + JSONBean.dumpRegionServerMetrics());
} catch (MalformedObjectNameException | IOException e) {
LOG.warn("Failed dumping metrics", e);
}
// Do our best to report our abort to the master, but this may not work
try {
if (cause != null) {

387
hbase-server/src/main/java/org/apache/hadoop/hbase/util/JSONBean.java Normal file
View File

@ -0,0 +1,387 @@
/*
* 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.hadoop.hbase.util;
import java.io.Closeable;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Array;
import java.util.Iterator;
import java.util.Set;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.IntrospectionException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.management.RuntimeErrorException;
import javax.management.RuntimeMBeanException;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.TabularData;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
/**
* Utility for doing JSON and MBeans.
*/
public class JSONBean {
private static final Log LOG = LogFactory.getLog(JSONBean.class);
private final JsonFactory jsonFactory;
public JSONBean() {
this.jsonFactory = new JsonFactory();
}
/**
* Use dumping out mbeans as JSON.
*/
public interface Writer extends Closeable {
void write(final String key, final String value) throws JsonGenerationException, IOException;
int write(final MBeanServer mBeanServer, ObjectName qry, String attribute,
final boolean description) throws IOException;
void flush() throws IOException;
}
public Writer open(final PrintWriter writer) throws IOException {
final JsonGenerator jg = jsonFactory.createJsonGenerator(writer);
jg.disable(JsonGenerator.Feature.AUTO_CLOSE_TARGET);
jg.useDefaultPrettyPrinter();
jg.writeStartObject();
return new Writer() {
@Override
public void flush() throws IOException {
jg.flush();
}
@Override
public void close() throws IOException {
jg.close();
}
@Override
public void write(String key, String value) throws JsonGenerationException, IOException {
jg.writeStringField(key, value);
}
@Override
public int write(MBeanServer mBeanServer, ObjectName qry, String attribute,
boolean description)
throws IOException {
return JSONBean.write(jg, mBeanServer, qry, attribute, description);
}
};
}
/**
* @param mBeanServer
* @param qry
* @param attribute
* @param description
* @return Return non-zero if failed to find bean. 0
* @throws IOException
*/
private static int write(final JsonGenerator jg,
final MBeanServer mBeanServer, ObjectName qry, String attribute,
final boolean description)
throws IOException {
LOG.trace("Listing beans for "+qry);
Set<ObjectName> names = null;
names = mBeanServer.queryNames(qry, null);
jg.writeArrayFieldStart("beans");
Iterator<ObjectName> it = names.iterator();
while (it.hasNext()) {
ObjectName oname = it.next();
MBeanInfo minfo;
String code = "";
String descriptionStr = null;
Object attributeinfo = null;
try {
minfo = mBeanServer.getMBeanInfo(oname);
code = minfo.getClassName();
if (description) descriptionStr = minfo.getDescription();
String prs = "";
try {
if ("org.apache.commons.modeler.BaseModelMBean".equals(code)) {
prs = "modelerType";
code = (String) mBeanServer.getAttribute(oname, prs);
}
if (attribute != null) {
prs = attribute;
attributeinfo = mBeanServer.getAttribute(oname, prs);
}
} catch (RuntimeMBeanException e) {
// UnsupportedOperationExceptions happen in the normal course of business,
// so no need to log them as errors all the time.
if (e.getCause() instanceof UnsupportedOperationException) {
if (LOG.isTraceEnabled()) {
LOG.trace("Getting attribute " + prs + " of " + oname + " threw " + e);
}
} else {
LOG.error("Getting attribute " + prs + " of " + oname + " threw an exception", e);
}
return 0;
} catch (AttributeNotFoundException e) {
// If the modelerType attribute was not found, the class name is used
// instead.
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch (MBeanException e) {
// The code inside the attribute getter threw an exception so log it,
// and fall back on the class name
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch (RuntimeException e) {
// For some reason even with an MBeanException available to them
// Runtime exceptionscan still find their way through, so treat them
// the same as MBeanException
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
} catch (ReflectionException e) {
// This happens when the code inside the JMX bean (setter?? from the
// java docs) threw an exception, so log it and fall back on the
// class name
LOG.error("getting attribute " + prs + " of " + oname
+ " threw an exception", e);
}
} catch (InstanceNotFoundException e) {
//Ignored for some reason the bean was not found so don't output it
continue;
} catch (IntrospectionException e) {
// This is an internal error, something odd happened with reflection so
// log it and don't output the bean.
LOG.error("Problem while trying to process JMX query: " + qry
+ " with MBean " + oname, e);
continue;
} catch (ReflectionException e) {
// This happens when the code inside the JMX bean threw an exception, so
// log it and don't output the bean.
LOG.error("Problem while trying to process JMX query: " + qry
+ " with MBean " + oname, e);
continue;
}
jg.writeStartObject();
jg.writeStringField("name", oname.toString());
if (description && descriptionStr != null && descriptionStr.length() > 0) {
jg.writeStringField("description", descriptionStr);
}
jg.writeStringField("modelerType", code);
if (attribute != null && attributeinfo == null) {
jg.writeStringField("result", "ERROR");
jg.writeStringField("message", "No attribute with name " + attribute + " was found.");
jg.writeEndObject();
jg.writeEndArray();
jg.close();
return -1;
}
if (attribute != null) {
writeAttribute(jg, attribute, descriptionStr, attributeinfo);
} else {
MBeanAttributeInfo[] attrs = minfo.getAttributes();
for (int i = 0; i < attrs.length; i++) {
writeAttribute(jg, mBeanServer, oname, description, attrs[i]);
}
}
jg.writeEndObject();
}
jg.writeEndArray();
return 0;
}
private static void writeAttribute(final JsonGenerator jg,
final MBeanServer mBeanServer, ObjectName oname,
final boolean description, final MBeanAttributeInfo attr)
throws IOException {
if (!attr.isReadable()) {
return;
}
String attName = attr.getName();
if ("modelerType".equals(attName)) {
return;
}
if (attName.indexOf("=") >= 0 || attName.indexOf(":") >= 0 || attName.indexOf(" ") >= 0) {
return;
}
String descriptionStr = description? attr.getDescription(): null;
Object value = null;
try {
value = mBeanServer.getAttribute(oname, attName);
} catch (RuntimeMBeanException e) {
// UnsupportedOperationExceptions happen in the normal course of business,
// so no need to log them as errors all the time.
if (e.getCause() instanceof UnsupportedOperationException) {
if (LOG.isTraceEnabled()) {
LOG.trace("Getting attribute " + attName + " of " + oname + " threw " + e);
}
} else {
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
}
return;
} catch (RuntimeErrorException e) {
// RuntimeErrorException happens when an unexpected failure occurs in getAttribute
// for example https://issues.apache.org/jira/browse/DAEMON-120
LOG.debug("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (AttributeNotFoundException e) {
//Ignored the attribute was not found, which should never happen because the bean
//just told us that it has this attribute, but if this happens just don't output
//the attribute.
return;
} catch (MBeanException e) {
//The code inside the attribute getter threw an exception so log it, and
// skip outputting the attribute
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (RuntimeException e) {
//For some reason even with an MBeanException available to them Runtime exceptions
//can still find their way through, so treat them the same as MBeanException
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (ReflectionException e) {
//This happens when the code inside the JMX bean (setter?? from the java docs)
//threw an exception, so log it and skip outputting the attribute
LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
return;
} catch (InstanceNotFoundException e) {
//Ignored the mbean itself was not found, which should never happen because we
//just accessed it (perhaps something unregistered in-between) but if this
//happens just don't output the attribute.
return;
}
writeAttribute(jg, attName, descriptionStr, value);
}
private static void writeAttribute(JsonGenerator jg, String attName, final String descriptionStr,
Object value)
throws IOException {
boolean description = false;
if (descriptionStr != null && descriptionStr.length() > 0 && !attName.equals(descriptionStr)) {
description = true;
jg.writeFieldName(attName);
jg.writeStartObject();
jg.writeFieldName("description");
jg.writeString(descriptionStr);
jg.writeFieldName("value");
writeObject(jg, description, value);
jg.writeEndObject();
} else {
jg.writeFieldName(attName);
writeObject(jg, description, value);
}
}
private static void writeObject(final JsonGenerator jg, final boolean description, Object value)
throws IOException {
if(value == null) {
jg.writeNull();
} else {
Class<?> c = value.getClass();
if (c.isArray()) {
jg.writeStartArray();
int len = Array.getLength(value);
for (int j = 0; j < len; j++) {
Object item = Array.get(value, j);
writeObject(jg, description, item);
}
jg.writeEndArray();
} else if(value instanceof Number) {
Number n = (Number)value;
jg.writeNumber(n.toString());
} else if(value instanceof Boolean) {
Boolean b = (Boolean)value;
jg.writeBoolean(b);
} else if(value instanceof CompositeData) {
CompositeData cds = (CompositeData)value;
CompositeType comp = cds.getCompositeType();
Set<String> keys = comp.keySet();
jg.writeStartObject();
for (String key: keys) {
writeAttribute(jg, key, null, cds.get(key));
}
jg.writeEndObject();
} else if(value instanceof TabularData) {
TabularData tds = (TabularData)value;
jg.writeStartArray();
for(Object entry : tds.values()) {
writeObject(jg, description, entry);
}
jg.writeEndArray();
} else {
jg.writeString(value.toString());
}
}
}
/**
* Dump out a subset of regionserver mbeans only, not all of them, as json on System.out.
* @throws MalformedObjectNameException
* @throws IOException
*/
public static String dumpRegionServerMetrics() throws MalformedObjectNameException, IOException {
StringWriter sw = new StringWriter(1024 * 100); // Guess this size
try (PrintWriter writer = new PrintWriter(sw)) {
JSONBean dumper = new JSONBean();
try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
jsonBeanWriter.write(mbeanServer,
new ObjectName("java.lang:type=Memory"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=IPC"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Replication"), null, false);
jsonBeanWriter.write(mbeanServer,
new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Server"), null, false);
}
}
sw.close();
return sw.toString();
}
/**
* Dump out all registered mbeans as json on System.out.
* @throws IOException
* @throws MalformedObjectNameException
*/
public static void dumpAllBeans() throws IOException, MalformedObjectNameException {
try (PrintWriter writer = new PrintWriter(System.out)) {
JSONBean dumper = new JSONBean();
try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
jsonBeanWriter.write(mbeanServer, new ObjectName("*:*"), null, false);
}
}
}
public static void main(String[] args) throws IOException, MalformedObjectNameException {
String str = dumpRegionServerMetrics();
System.out.println(str);
}
}