JMX monitoring

[allexpetrov]

Hi,

I have installed tomcat on linux machine. The port 8080 is currently working. What is the next step i have to do to get java gateway working.

Thanks,
Jayshankar

Have you managed to edit config file ? I mean, if you will run netstat -tulpn you'll find there open port with nr. 12345 ? Have you managed to add new host with JMX port ?


vim/nano /etc/tomcat/tomcat.conf

JAVA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=12345 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

[Jayshankar]

I have to edit which config file??. netstat -tulpn is not showing port 12345. The host has been configured on the frontend side with JMX Interface. The tomcat is also configured(etc/tomcat/tomcat.conf).

[Jayshankar]

JMX monitoring

netstat -tulpn | grep 12345
tcp6 0 0 :::12345 :::* LISTEN 20804/java

[Jayshankar]

JMX monitoring

I need futher help in setting up JMX monitoring. Any help would be appreciated.

[allexpetrov]

I need futher help in setting up JMX monitoring. Any help would be appreciated.

Ok, once again..

1. Have you configured the JavaGateway and Poler count in zabbix_server.conf ? In my example i have server and javagateway installed on one host.

JavaGateway=127.0.0.1
StartJavaPollers=5

2. Have you created a new Host with JMX interface ?

3. In case everything is done - output of tail -f /var/log/zabbix/zabbix_server.log would be great!

Because as I see in your output of netstat - the port is up and listening.

Regards,
Alexey!

[Jayshankar]

JMX monitoring

zabbix_server.conf configured with JavaGateway and JavaPollers.

A new host for JMX item created with jmx template. JMX service enabled successfuly for the new host.

Logs messages in zabbix_server.log are as follows:

26317:20170821:101700.511 In evaluate_function() function:'zealapp1:jmx["java.l
ang:type=Runtime",Uptime].nodata(5m)'
26317:20170821:101700.512 End of evaluate() error:'Cannot evaluate expression:
"Cannot evaluate function "zealapp1:jmx["java.lang:type=Runtime",Uptime].nodata(
5m)": item does not have enough data after server start or item creation.".'

26317:20170821:101700.512 evaluate_expressions():expression [(ZBX_UNKNOWN0)=1]
cannot be evaluated: Cannot evaluate expression: "Cannot evaluate function "zeal
app1:jmx["java.lang:type=Runtime",Uptime].nodata(5m)": item does not have enough
data after server start or item creation.".

26317:20170821:101700.513 query [txnlev:1] [update triggers set state=1,error='
Cannot evaluate expression: "Cannot evaluate function "zealapp1:jmx["java.lang:t
ype=Runtime",Uptime].nodata(5m)": item does not ' where triggerid=14224;

26330:20170821:101718.373 In substitute_key_macros() data:'jmx["Catalina:type=G
lobalRequestProcessor,name=http-8080",bytesReceived]'
26330:20170821:101718.373 End of substitute_key_macros():SUCCEED data:'jmx["Cat
alina:type=GlobalRequestProcessor,name=http-8080",bytesReceived]'

26330:20170821:101718.373 In substitute_key_macros() data:'jmx["java.lang:type=
Threading",TotalStartedThreadCount]'

26330:20170821:101718.375 End of substitute_key_macros():SUCCEED data:'jmx["jav
a.lang:type=MemoryPool,name=CMS Old Gen",Usage.committed]'
26330:20170821:101718.376 JSON before sending [{"request":"java gateway jmx","c
onn":"127.0.0.1","port":12345,"keys":["jmx[\"Catalina:type=GlobalRequestProcesso
r,name=http-8080\",bytesReceived]","jmx[\"java.lang:type=Threading\",TotalStarte
dThreadCount]","jmx[\"java.lang:type=Threading\",ThreadCount]","jmx[\"java.lang:
type=Threading\",PeakThreadCount]","jmx[\"Catalina:type=GlobalRequestProcessor,n
ame=http-8080\",bytesSent]","jmx[\"Catalina:type=GlobalRequestProcessor,name=htt
p-8080\",processingTime]","jmx[\"Catalina:type=GlobalRequestProcessor,name=htt p-
8443\",errorCount]","jmx[\"java.lang:type=Runtime\",Uptime]","jmx[\"java.lang:ty
pe=OperatingSystem\",ProcessCpuLoad]","jmx[\"java.lang:type=OperatingSystem\",Op
enFileDescriptorCount]","jmx[\"Catalina:type=Manager,path=/,host=localhost\",act

26329:20170821:101719.596 query [txnlev:1] [update hosts set jmx_available=1 wh
ere hostid=10125]
26329:20170821:101719.672 enabling JMX agent checks on host "zealapp1": host be
came available
26323:20170821:101719.783 item "zealapp1:jmx["java.lang:type=GarbageCollector,n
ame=ConcurrentMarkSweep",CollectionCount]" became not supported: java.lang:type=
GarbageCollector,name=ConcurrentMarkSweep

[Jayshankar]

JMX monitoring

Is the above output right??.