Unable to start Application Server after increasing Java Virtual Machine heap size
 Technote (troubleshooting)
 
Problem(Abstract)
After increasing the Java™ Virtual Machine (JVM) heap size setting in any release of WebSphere® Application Server Advanced Edition V5.0, your Application Server might not start.
 
Cause
If the MAXDATA value is not set high enough, the system may be unable to allocate a heap of the requested size.
 
Resolving the problem
If you increase either or both the initial or maximum JVM heap size values on an Application Server, you may see errors similar to the following in the native_stderr.log the next time try to start it:

Unable to alloc heap of requested size, perhaps the maxdata value is too small - see README.HTML for more information.
**Out of memory, exiting**

These error messages can be an indication that the MAXDATA value is set too low.

To address this problem, change the MAXDATA value using the following command when more than 1GB is used by Java virtual machine.

export LDR_CNTRL=MAXDATA=0xn0000000
(n segments)
 
 
Cross Reference information
Segment Product Component Platform Version Edition
Application Servers Runtimes for Java Technology Java SDK
 
 


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > Java SDK
Operating system(s): AIX
Software version: 5.0
Software edition:
Reference #: 1052444
IBM Group: Software Group
Modified date: Aug 6, 2007