Could not reserve enough space for object heap

[Nancy Dawson]

I am having problem starting my tomcat , Pls the errors are

"Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine."

[Scott Johnson]

First shutdown non-essential applications to free some memory.

If that doesn't work, look in the Tomcat conf directory and open the workers2.properties.

Under the [vm:] section, post the parameters so we can see how you've configured Tomcat.

Do you see a parameter like "OPT=-Xmn???M" ? Change the number to a smaller value and try starting Tomcat again.

(I'm assuming you are using Tomcat 5.5, if not the conf file may be different.)

[Ben Souther]

How did you install Tomcat?
How do you start/stop Tomcat?

If that doesn't work, look in the Tomcat conf directory and open the workers2.properties.

Unless she's using a connector (For Apache HTTPD or IIS) she probably doesn't have a workers2.properties file.

[Nancy Dawson]

Originally posted by Ben Souther:
How did you install Tomcat?
How do you start/stop Tomcat?




Unless she's using a connector (For Apache HTTPD or IIS) she probably doesn't have a workers2.properties file.

I installed tomcat by unzipping the apache file i downloaded

I am starting tomcat by using ./startup.sh

Stopping by using ./shutdown.sh

[Ben Souther]

OK, (with Windows, altering the heap settings is different depening on whether you've installed as a service or not), you're on *nix..

You can increase the heap space settings by adding the following line to your {tomcat install}/conf/catalina.sh file (in bold):

 
#                   of catalina startup java process, when start (fork) is used
#
# $Id: catalina.sh 345508 2005-11-18 15:54:56Z yoavs $
# -----------------------------------------------------------------------------
export JAVA_HOME=/usr/local/jdk1.5.0
[B]JAVA_OPTS='-Xms128m -Xmx128m'[/B]
                                                                                

Xms is the initial heap size.
Xmx is the max heap size.

By default the JVM uses 64M which may not be enough for your app.
[ October 04, 2006: Message edited by: Ben Souther ]

[Ben Souther]

Also, does your machine have enough ram to run Tomcat?

[Nancy Dawson]

Originally posted by Ben Souther:
Also, does your machine have enough ram to run Tomcat?

Its a Red Hat Linux 4 with 256MB of Memory

[Ben Souther]

That's not a lot.
Are you running XWindows too?

The free command will tell you what you've got available:

 
[bsouther@bsouther bsouther]$ free -m
             total       used       free     shared    buffers     cached
Mem:          1011        730        280          0        332        233
-/+ buffers/cache:        165        846
Swap:          509          2        506

The -m switch will cause the output to be displayed in megabytes.