1.测试环境
服务器:RedHat Linux 3.4.3-9.EL4(内核版本 2.6.9-5.EL),Tomcat5.5.20,Sun JDK 1.5.0_09,JProfiler 4.3.2 for linux(安装包:jprofiler_linux_4_3_2.sh)
客户端:Windows XP,JProfiler 4.3.2 for windows(安装包:jprofiler_windows_4_3_2.exe)
2.JProfiler软件下载地址 http://www.ej-technologies.com/
3.客户端 JProfiler 安装 略
4.服务器端 JProfiler 安装:
把 jprofiler_linux_4.3.2.sh 上传到到服务器,假设路径为 /opt/jprofiler
# cd /opt/jprofiler
# chmod +x *.sh
# ./jprofiler_linux_4.3.2.sh -c
按照提示来安装,提示都很简单,不在多说。安装路径选择 /opt/jprofiler4
注意,这里的 -c 意思是用字符方式来安装,如果机器上没有 X 则加上该参数.
5.客户端连接配置
1). 运行 JProfiler 。第一次打开会有向导,忽略它。
2). 选择 Session->Integration Wizard->New Remote Integratation
3). 选择 On a remote computer;Platform of remote computer 选择 Linux x86/AMD 64;Next
4). 输入服务器 IP ;Next
5). 输入服务器上的 jprofiler 的安装路径,如 /opt/jprofiler4 ;next
6). 选择服务器的 JDK 环境,这里是:Sun,1.5.0,hotspot;next
7). 输入端口:这里是默认值 8849;next
8). 选择启动模式:这里选第一种 wait for a connection from the jprofiler GUI;next
9). 这里会列出需要在服务器端做的配置:
Integration type: [Generic application]
Selected JVM: Sun
1.5
.
0
(hotspot)
Startup mode: Wait
for
JProfiler GUI
(
1
) Please insert
-
agentlib:jprofilerti
=
port
=
8849
-
Xbootclasspath
/
a:
/
opt
/
jprofiler4
/
bin
/
agent.jar
into the start command of your remote application right after the java command.
(
2
) Please add
/
opt
/
jprofiler4
/
bin
/
linux
-
x86
to the environment variable LD_LIBRARY_PATH.
A remote session named Remote application on
192.168
.
40.15
will be created that connects to a running instance of the remote application that is started with the modified start command.
6.服务器端的配置
(1)修改系统环境配置文件 /etc/profile ,增加
JPROFILER_HOME
=/
opt
/
jprofiler4
/
bin
/
linux
-
x86
export LD_LIBRARY_PATH
=
$LD_LIBRARY_PATH:$JPROFILER_HOME
(2)修改TOMCAT启动文件catalina.sh,添加-agentlib:jprofilerti=port=8849 -Xbootclasspath/a:/opt/jprofiler4/bin/agent.jar 内容到CATALINA_OPTS中;
“-agentlib:jprofilerti=port=8849 -Xbootclasspath/a:/opt/jprofiler4/bin/agent.jar ” 此内容由客户端软件生成
CATALINA_OPTS
=
"
$CATALINA_OPTS -Xms128m -Xmx128m $JPDA_OPTS -agentlib:jprofilerti=port=8849 -Xbootclasspath/a:/opt/jprofiler4/bin/agent.jar
"
7.Reboot Linux and startup Tomcat using startup.sh;
The log of tomcat which is $CATALINA_HOME/logs/catalina.out will show:
JProfiler
>
Protocol version
23
JProfiler
>
Using JVMTI
JProfiler
>
32
-
bit library
JProfiler
>
Listening on port:
8849
.
JProfiler
>
Native library initialized
JProfiler
>
Waiting
for
a connection from the JProfiler GUI
8.启动客户端软件
点击jprofiler菜单 session>start center>Open Session
Available session configurations中列出了刚才配置的连接,选中使用就OK了!!
9.The log of tomcat which is $CATALINA_HOME/logs/catalina.out will show:
JProfiler
>
Using dynamic instrumentation
JProfiler
>
Time measurement: elapsed time
JProfiler
>
CPU profiling enabled
JProfiler
>
Hotspot compiler enabled
JProfiler
>
Starting org
/
apache
/
catalina
/
startup
/
Bootstrap
10.当中断JProfiler连接时
The log of tomcat which is $CATALINA_HOME/logs/catalina.out will show:
JProfiler
>
Disconnected. Waiting
for
reconnection.
JProfiler
>
Listening on port:
8849
.
经过我的测试发现了有以上一些问题
1、)并不是将-agentlib:jprofilerti=port=8849 -Xbootclasspath/a:/opt/jprofiler4/bin/agent.jar 加入到CATALINA_OPTS 中而是加入到 JAVA_OPTS中,加入格式如下所示:
其余步同上
JAVA_OPTS
=
"
$JAVA_OPTS
"
-agentlib:jprofilerti
=
port
=
8849
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Xbootclasspath/a:/opt/jprofiler5/bin/agent.jar
下面是我采用过的一个完整的配置
if
[
-r "$CATALINA_HOME"/bin/tomcat-juli.jar
]
;
then
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Xms128m
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Xmx256m
JAVA_OPTS
=
"
$JAVA_OPTS
"
-XX:PermSize
=
32m
JAVA_OPTS
=
"
$JAVA_OPTS
"
-XX:MaxNewSize
=
128m
JAVA_OPTS
=
"
$JAVA_OPTS
"
-XX:MaxPermSize
=
64m
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Dcom.sun.management.jmxremote
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Dcom.sun.management.jmxremote.port
=
9009
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Dcom.sun.management.jmxremote.authenticate
=
false
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Dcom.sun.management.jmxremote.ssl
=
false
JAVA_OPTS
=
"
$JAVA_OPTS
"
-agentlib:jprofilerti
=
port
=
8849
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Xbootclasspath/a:/opt/jprofiler5/bin/agent.jar
JAVA_OPTS
=
"
$JAVA_OPTS
"
-Djava.util.logging.manager
=
org.apache.juli.ClassLoaderLogManager
"
"
-Djava.util.logging.config.file
=
"
$CATALINA_BASE/conf/logging.properties
"
fi
当时遇到的问题是jconsole无法连接上远程Linux上的JVM,Google看到Sun官方bugdatabase有人讲是bug,就没再理。今天再次Google,在java.sun.com/j2se/1.5.0/docs/guide/management/faq.html#linux2看到
Run "hostname -i" command. If it reports 127.0.0.1, JConsole would not be able to connect to the JVM running on that Linux machine. To fix this issue, edit /etc/hosts so that the hostname resolves to the host address.
马上修改/etc/hosts,连接成功了。对于上面提到“在一个jsp中进行while (true);死循环”的测试,一个个线程查看,发现有一个Thread在_jspService方法上始终处于Runnable状态。看来Programmer还是得用Google