From page 167 of the JDK 5.0 Troubleshooting guide. http://java.sun.com/javase/
java.lang.OutOfMemoryError: request <size> bytes for <reason>. Out of swap space? Although it appears that an OutOfMemoryError is thrown this apparent exception is reported by the HotSpot VM code when an allocation from the native heap failed and the native heap may be close to exhaustion. The message indicates the size (in bytes) of the request that failed and also indicates what the memory is required for. In some cases the reason will be shown but in most cases the reason will be the name of a source module reporting the allocation failure. If an OutOfMemoryError with this error is thrown it may require using utilities on the operating system to diagnose the issue further. Examples of issues that may not be related to the application are when the operating system is configured with insufficient swap space, or when there is another process on the system that is consuming all memory resources. If neither of these issues is the cause then it is possible that the application is failed due to native leak; for example, application or library code is continuously allocating memory but is not releasing it to the operating system.it to the operating system.
How much swap space does the OS have?
You're running with 256mb as long as i can see. Maybe increasing this will help.
My current virtual memory is :
Drive C: Space available 70xxx MB
Initial size (MB) : 2046
Maximum size (MB) : 4092
Sorry for my late reply and thank you all suggestion
We don't have any process use a lot of memory Sometimes,I started three XAS Instance(Production,Acceptance,Upgrade) for our users. Even though I stop Acceptance and Upgrade environment,This problem is still a live