Cluster Server 8.0 Configuration Guide for SAP Web Application Server - Windows
- Section I. Getting Started
- Introducing the Veritas High Availability Agent for SAP Web Application Server
- About the Veritas High Availability agent for SAP Web Application Server
- How does the Veritas High Availability solution work
- Agent functions
- Installing and configuring the SAP Web Application Server for high availability
- Setting up SAP systems for clustering
- Configuring the Enqueue Replication Server
- Clustering an SAP instance
- Introducing the Veritas High Availability Agent for SAP Web Application Server
- Section II. Configuring the application for high availability
- Section III. Troubleshooting the Agent
- Troubleshooting the agent for SAP Web Application Server
- Troubleshooting common problems
- Reviewing SAP Web Application Server agent log files
- Reviewing error log files
- Troubleshooting the agent for SAP Web Application Server
- Appendix A. Sample Configurations
Preventing early faulting of Java and Add-In instances
When you start a SAP Java or a SAP Add-In Application Server Instance, SAP automatically starts processes such as jstart.exe. Depending upon the available resources, starting these processes takes some finite time.
The agent for SAP WebAS allows enough time for SAP to start these processes successfully. The agent checks the status of these processes in definite intervals. While checking the status of these processes, if the processes are missing, the agent pauses for a time period that is equal to one-tenth of the value of the MonitorTimeout attribute before re-checking the status of the processes.
Veritas strongly recommends that the administrator set the MonitorTimeout attribute, such that the agent gives enough time for these processes to restart if a failure occurs.
For example, if an add-in server instance takes 9 seconds to restart a failed jstart process, you must set the value of the MonitorTimeout attribute to at least 90 seconds.