Beginning in i5/OS™ V5R4, you can use the Display Java™ Virtual Machine Jobs (DSPJVMJOB) CL command to manage your JVM jobs and apply PTFs while the system is active.
Many Java Program Temporary Fixes (PTFs) impact the JVM such that, if the code is applied while a JVM job is running, applying the PTF will cause unpredictable results. In the past, the application of some Java PTFs has been delayed until an initial program load (IPL) could be performed on the system to ensure that there would be no JVM jobs running on the system. Many users, however, found this to be inconvenient. A JVM pre-condition was added so that many of those delayed PTFs could be applied immediately, if no JVMs are active on the system. The DSPJVMJOB command allows you to see which jobs have JVMs running in them. With this information, you can end the jobs containing active JVMs appropriately before applying PTFs, instead of waiting for an IPL for the PTFs to be applied.
To learn more about the DSPJVMJOB command, see Display Java Virtual Machine Jobs in the CL topic.
