Java Startup and Control Framework in NW 7.0

The Java start and control framework consists of three programs. Each of the programs has specific responsibilities, as shown in Table 3-1.

TABLE 3-1 JControl, JLaunch, and Bootstrap Java Programs

Since we now know the responsibilities of the three programs, let us examine the process steps of the start and control framework, as shown in Figure 3-6. This understanding will help you troubleshoot any system startup problems.

FIGURE 3-6 NW 7 Java start and control framework

Step 1:

• The startsap command will start the JControl process.

• JControl starts signal handling and connects to the Java message server.

• JControl starts the JLaunch bootstrap process by reading the bootstrap.properties file in the /usr/sap/<SID>/<instance>/j2ee/cluster/bootstrap directory.