July 24, 2009 at 5:26 am
Symptom
Login to a system, from the same browser session go to another system and re-authenticate to that system, go back to the previous system and
try to access some different application. The SSO will not work any longer and you will be asked to re-authenticate.
Other terms
SSO, Logon Ticket, MYSAPSSO2, Authentication
Reason and Prerequisites
You have two systems [...]
June 30, 2009 at 9:12 am
Symptom
You notice that the J2EE Engine restarts frequently, due to an Out Of Memory Error(OOM) (i.e., “java.lang.OutOfMemoryError” ). Traces and thread dumps will exhibit, the following error message: “java.lang.OutOfMemoryError. The JVM(Java Virtual Machine) will exit with an exit code of 666″
Other terms
JDBC, JDBC Adapter, OutOfMemoryError, OOM , Message Size Limit, Limit Number of [...]
June 30, 2009 at 9:09 am
Symptom
You are using JDBC adapter in your scenarios with QoS(Quality of Service) as Synchronous(Best Effort/BE). However, messages report a “MessageExpiredException”.
Other terms
JDBC, JDBC Adapter, Dummy Query, timeout, dummySQLQueryTimeout, timeout, synchronous, best effort
Reason and Prerequisites
Any delay in the response to a blocking synchronous request, results in the above exception. In this case, the delay is [...]
June 20, 2009 at 7:07 am
Symptom
It sometimes takes a long time to attach a virtual machine (VM) to a work process.
Other terms
VMC, VM container, virtual machine, performance, attach, mprotect, mmap
Reason and Prerequisites
To isolate the memory, the required areas of memory are “unlocked” when a VM is attached and are “locked” again when a VM is detached. This means [...]