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Question by Josep C. · Jul 28, 2015 at 02:57 PM · production

Too small initial heap

Hi,

in setting up one agent for JBoss with Oracle JVM I'm getting this error:

 

2015-07-28 08:54:31 [41892940] info    [native] Build platform .............. Linux x86 64-bit

2015-07-28 08:54:31 [41892940] info    [native] Platform .................... Linux 2.6.18-274.3.1.el5 x86_64

2015-07-28 08:54:31 [41892940] info    [native] Bootstrap version ........... 6.0.0.6738

2015-07-28 08:54:31 [41892940] info    [native] Log level console ........... info

2015-07-28 08:54:31 [41892940] info    [native] Log level file .............. info

2015-07-28 08:54:31 [41892940] info    [native] Log file .................... /opt/dynatrace-6.0.0/log/dt_JBOSS_MC_INT01_10632.0.log

2015-07-28 08:54:31 [41892940] info    [native] Agent host .................. SRVAQMCINT01

2015-07-28 08:54:31 [41892940] info    [native] Agent library ............... /opt/dynatrace-6.0.0/agent/downloads/6.0.0.7153/native/linux-x86-64/libdtagentcore.so

2015-07-28 08:54:31 [41892940] info    [native] Options string .............. name=JBOSS_MC_INT01,server=srvdynapro01:9998

2015-07-28 08:54:31 [41892940] info    [native] Agent name .................. JBOSS_MC_INT01

2015-07-28 08:54:31 [41892940] info    [native] Server/Collector ............ srvdynapro01:9998

2015-07-28 08:54:31 [41892940] info    [native] Interface type .............. JVMTI

2015-07-28 08:54:31 [41892940] info    [native] Process ID .................. 10632

2015-07-28 08:54:31 [41892940] info    [native] JVM name .................... Java HotSpot(TM) 64-Bit Server VM 19.0-b09

2015-07-28 08:54:31 [41892940] info    [native] JVM vendor .................. Sun Microsystems Inc.

2015-07-28 08:54:31 [41892940] info    [native] JVM info .................... mixed mode, sharing

2015-07-28 08:54:31 [41892940] info    [native] Detected application server: JBoss

2015-07-28 08:54:31 [41892940] info    [native] Reading LoadBalancing configuration from srvdynapro01:9998

2015-07-28 08:54:31 [41892940] info    [native] Storing collector peer list (0 entries) to /opt/dynatrace-6.0.0/agent/conf/collectorlist.JBOSS_MC_INT01

2015-07-28 08:54:31 [41892940] info    [native] Trying to connect to Server/Collector for up to 19 seconds

2015-07-28 08:54:32 [41892940] info    [native] Instrumentation channel connected successfully

2015-07-28 08:54:32 [41892940] info    [native] Received instrumentation blacklist (24980 classes, 1748 KiB)

2015-07-28 08:54:32 [41892940] info    [native] Connected to Server/Collector srvdynapro01:9998

Error occurred during initialization of VM

Too small initial heap

 

should increase the initial inicial heap memory of JBoss to do the instrumentation? Why?

Thanks in advance!


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Answer by Reinhard W. · Jul 28, 2015 at 03:44 PM

Does your machine have enough RAM? Looks like you are running a 64JVM. What heap settings are you using?

Dynatrace requires a little bit additional memory so if your machine is already maxed out you probably want to increase memory.

Also you should probably upgrade your kernel. I just ran into issues with a 2.6 kernel and the Java leap second bug (smile)

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Answer by Josep C. · Jul 28, 2015 at 04:21 PM

Thanks  reinhard.brandstaedter@dynatrace.com! Adding a little bit of additional memory worked!

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