The document discusses tools for monitoring and managing Java applications and devices using JMX and SNMP technologies. JMX allows building distributed, web-based solutions for monitoring and managing applications and networks. SNMP is commonly used to monitor network devices. The document then covers JConsole and JMX consoles for visualizing JMX data from local or remote Java applications, with an emphasis on monitoring JBoss Application Server using tools like JConsole, VisualVM, and JBoss' twiddle command-line tool.

1. JMX Tools
Ferramentas de Monitoração

2. 2

3. Java Management
eXtension
‟
The JMX technology provides the tools for
building distributed, Web-based, modular and
dynamic solutions for managing and
monitoring devices, applications, and
service-driven networks.
http://java.sun.com/javase/technologies/core/mntr-mgmt/javamanagement/index.jsp 3

4. Simple Network
Management Protocol
‟
Simple Network Management Protocol
(SNMP) is used in network
management systems to
monitor network-attached devices for
conditions that warrant administrative
attention.
http://en.wikipedia.org/wiki/Simple_Network_Management_Protocol 4

5. JMX Java
SNMP Rede
5

6. SNMP
monitoração
gerenciamento
Dispositivo SNMP Console SNMP
6

7. JMX
monitoração
gerenciamento
Aplicação JMX Console JMX
7

8. Console SNMP
- Nagios -
8

9. Console JMX
- MC4J -
9

10. Managed Beans
mbean
mbean mbean
mbean
10

11. Microkernel
mbean
mbean mbean
mbean
http://www.jboss.org/community/docs/DOC-10671
http://www.jboss.org/community/docs/DOC-10543 11

12. JBoss
http://www.jboss.org/file-access/default/members/jbossas/freezone/docs/Server_Configuration_Guide/4/html/The_JBoss_JMX_Microkernel-An_Introduction_to_JMX.html 12

13. 13

14. Desafio
mbean mbean mbean mbean mbean mbean mbean mbean mbean
mbean mbean mbean mbean mbean mbean mbean mbean mbean
14

15. Console JMX
nativo do
JBoss
mbean
15

16. MBeans têm atributos
16

17. MBeans têm operações
17

18. Resultado de uma
operação
18

19. Outros
Consoles JMX
19

20. twiddle
CLI do JBoss
app/jboss-4.2.2.GA/bin$ ls
classpath.sh probe.sh twiddle.sh
javassist.jar run.bat wsconsume.bat
jboss-profiler-plugins.jar run.conf wsconsume.sh
jboss-profiler.jar run.jar wsprovide.bat
jboss-profiler.properties run.sh wsprovide.sh
jboss_init_hpux.sh shutdown.bat wsrunclient.bat
jboss_init_redhat.sh shutdown.jar wsrunclient.sh
jboss_init_suse.sh shutdown.sh wstools.bat
jmxremote.password twiddle.bat wstools.sh
jmxremote.password.template twiddle.jar
probe.bat twiddle.log
20

21. get atributo
twiddle mbean
invoke operação parâmetros
21

22. ./run.sh
jboss-4.2.2.GA/bin$ ./twiddle.sh get jboss.system:type=ServerInfo HostAddress
10:54:35,761 ERROR [Twiddle] Exec failed
org.jboss.util.NestedRuntimeException: - nested throwable: (javax.naming.CommunicationException [Root exception is
java.rmi.ConnectException: Connection refused to host: 192.168.1.17; nested exception is:
java.net.ConnectException: Connection refused])
at org.jboss.console.twiddle.Twiddle$1.getServer(Twiddle.java:143)
at org.jboss.console.twiddle.command.MBeanServerCommand.getMBeanServer(MBeanServerCommand.java:59)
at org.jboss.console.twiddle.command.GetCommand.execute(GetCommand.java:149)
at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:305)
./run.sh -b 192.168.1.17
jboss-4.2.2.GA/bin$ ./twiddle.sh get jboss.system:type=ServerInfo HostAddress
11:05:41,966 ERROR [Twiddle] Exec failed
org.jboss.util.NestedRuntimeException: Could not obtain connection to any of these urls: localhost:1099 and discovery
failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is
java.net.SocketTimeoutException: Receive timed out]; - nested throwable: (javax.naming.CommunicationException: Could not
obtain connection to any of these urls: localhost:1099 and discovery failed with error:
javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed
out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception
is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is
java.net.ConnectException: Connection refused]]])
./run.sh -b 0.0.0.0
jboss-4.2.2.GA/bin$ ./twiddle.sh get jboss.system:type=ServerInfo HostAddress
HostAddress=192.168.1.17
22

23. $ ./twiddle.sh get jboss.system:type=ServerInfo HostAddress
HostAddress=192.168.1.17
$ ./twiddle.sh get jboss.system:type=ServerInfo OSArch
OSArch=ppc
$ ./twiddle.sh get jboss.system:type=ServerInfo JavaVersion
JavaVersion=1.5.0_16
23

24. $ ./twiddle.sh invoke jboss.system:type=ServerInfo listThreadCpuUtilization
<table><tr><th>Thread Name</th><th>CPU (milliseconds)</th></tr><tr><td>DefaultQuartzScheduler_QuartzSchedulerThread</
td><td>2347</td></tr><tr><td>ScannerThread</td><td>1326</td></tr><tr><td>http-0.0.0.0-8080-1</td><td>814</td></
tr><tr><td>DestroyJavaVM</td><td>782</td></tr>(...)
$ ./twiddle.sh invoke jboss.system:type=ServerInfo listMemoryPools true
<b>Total Memory Pools:</b> 5<blockquote><b>Pool: Code Cache</b> (Non-heap memory)<blockquote>Peak Usage : init:
163840, used:4691136, committed:4947968, max:33554432<br>Current Usage : init:163840, used:4683776, committed:4947968,
max:33554432<blockquote><br>|---------| committed:4.72Mb<br>
+---------------------------------------------------------------------+<br>|/////////|
| max:32Mb<br>+---------------------------------------------------------------------+<br>|--------| used:4.47Mb</
blockquote></blockquote><br><b>Pool: Eden Space</b> (Heap memory)(...)
24

25. JConsole
http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html 25

26. JConsole
pré-requisitos
Java5+
26

27. JConsole
execução
Nenhuma VM foi
encontrada para
monitoração
27

28. JBoss AS
JBoss não está
preparado para o
JConsole
28

29. Parâmetro para
habilitar monitoração
via JMX console
...
29

30. Agora sim. VM do JBoss
automaticamente
detectada pelo JConsole
30

31. Resumo de tudo
31

32. GC
As diversas regiões de memória da JVM
32

33. 33

34. 34

35. MBeans da JVM
Cadê os do JBoss?
35

36. Por padrão, o JBoss não usa
o MBean Server da VM, mas
uma implementação própria,
chamada JBossMX
36

37. Agora sim!
37

38. Na vida real,
servidores são
acessados
remotamente.
38

39. Arquivo de senhas
para acesso JMX
remoto
Configuração do
arquivo de senhas no
run.conf do JBoss
39

40. JConsole
mais infos
http://java.sun.com/j2se/1.5.0/docs/guide/
management/agent.html#jmxagent
40

41. Usar o JConsole para monitoração das mesmas
informações monitoradas pela linha de comando nos
exercícios anteriores.
41

42. MC4J
http://mc4j.org 42

43. Parou no tempo
43

44. VisualVM
https://visualvm.dev.java.net/ 44

45. 45

46. java-6-sun-1.6.0.13/bin$ ls
appletviewer javac jinfo native2ascii tnameserv
apt javadoc jmap orbd tools.policy
ControlPanel javah jps pack200 unpack200
extcheck javap jrunscript policytool wsgen
HtmlConverter java-rmi.cgi jsadebugd rmic wsimport
i386 javaws jstack rmid xjc
idlj jconsole jstat rmiregistry
jar jcontrol jstatd schemagen
jarsigner jdb jvisualvm serialver
java jhat keytool servertool
46

47. VisualVM
pré-requisitos
47

48. VisualVM
pré-requisitos
todas são configurações no servidor remoto
Servidor RMI para Endereço a ser enviado ao
receber conexões VisualVM para que se conecte
remotas ao servidor remoto
48

49. Endereço do
servidor remoto
49

50. Endereço do
agente JMX
50

51. JVMs
monitoráveis no
servidor remoto
51

52. Resumo da
monitoração do
JBoss
52

53. Monitoração do
JBoss
53

54. Monitoração do
próprio VisualVM
Dump da
memória
54

55. Resumo do dump
de memória
55

56. Memória consumida
por cada tipo de
objeto
56

57. Instâncias de uma
classe específica
57

58. Threads do Snapshot das
servidor threads
58

59. 59

60. A graça do
VisualVM está em
seus plugins
60

61. 61

62. 62

63. 63

64. MBeans do JBoss
64

65. 65

66. Troubleshooting
porque os problemas virão
66

67. Conexão estabelecida,
mas nada acontece.
Inicialize o ‘jstatd’ no
servidor remoto e todas
as aplicações
monitoráveis serão
identificadas e
apresentadas no
VisualVM
67

68. Problema de conexão com o
agente JMX da JVM remota.
Configure o parâmetro
java.rmi.server.hostname
no run.conf do servidor remoto 68

69. VisualVM 1.1
tem problemas
com JDK6u12
http://blogs.sun.com/nbprofiler/entry/visualvm_fixed_to_correctly_recognize 69

70. Plugin para resolver a
incompatibilidade do
VisualVM 1.1 com
JDK6u12
70

71. $ jstatd
Could not create remote object
access denied (java.util.PropertyPermission java.rmi.server.ignoreSubClasses write)
java.security.AccessControlException: access denied (java.util.PropertyPermission
java.rmi.server.ignoreSubClasses write)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.System.setProperty(System.java:727)
at sun.tools.jstatd.Jstatd.main(Jstatd.java:122)
grant codebase "file:${java.home}/../lib/tools.jar" {
permission java.security.AllPermission;
};
$JAVA_HOME/bin/tools.policy
$sudo jstatd -J-Djava.security.policy=$JAVA_HOME/bin/tools.policy
71

72. eclipse-jmx
http://code.google.com/p/eclipse-jmx/
72

73. Pelo VisualVM,
acompanhar métricas
de memória, threads
e processamento
durante os testes de
carga.
73

74. P&R