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Fault Analyzer installation and administration
Using the Fault Analyzer IDIS subsystem
Fault Analyzer uses a subsystem known as IDIS for services that can otherwise not be performed or which might cause incomplete analysis if not started.
Starting the IDIS subsystem
IDIS subsystem requirements for Java
Specifying a default JVM for Java dump analysis
Performing Java™ dump analysis requires a JVM that has a service level equal to, or greater than, the JVM that recorded the Java dump. Optional DD statements can specify default JVMs to use when the version of Java indicated by the dump JAVA_HOME path cannot be found on the system.

Fault Analyzer installation and administration
- Migrating from an earlier version of Fault Analyzer
- Preparing to customize Fault Analyzer
- Customizing the operating environment for Fault Analyzer
- Using the Fault Analyzer IDIS subsystem
  Fault Analyzer uses a subsystem known as IDIS for services that can otherwise not be performed or which might cause incomplete analysis if not started.
  - Sysplex-wide subsystem inter-communication
    Multiple IDIS subsystems in a sysplex interface with one another using the Cross-system Coupling Facility (XCF) to allow efficient sharing of subsystem-managed data, such as the caching of $$INDEX data.
  - Caching of history file $$INDEX data
  - Starting the IDIS subsystem
    - IDIS subsystem storage requirements
    - IDIS subsystem requirements for DB2
    - IDIS subsystem requirements for Java
      - Specifying an IDIJLIB DD statement
      - Specifying a default JVM for Java dump analysis
        Performing Java™ dump analysis requires a JVM that has a service level equal to, or greater than, the JVM that recorded the Java dump. Optional DD statements can specify default JVMs to use when the version of Java indicated by the dump JAVA_HOME path cannot be found on the system.
    - IDIS subsystem requirements for deletion of migrated tightly-coupled associated dump data sets
  - Stopping the IDIS subsystem
    The IDIS subsystem can be stopped and restarted at any time.
- Modifying your ISPF environment
- Customize Fault Analyzer by using USERMODs
- Customize Fault Analyzer by using an IDIOPTLM configuration-options module
- Setting up history files
  Fault Analyzer requires at least one PDS or PDSE data set to be allocated as a fault history file.
- Setting and changing default options for the site
- Providing compiler listings or Fault Analyzer side files
- Customizing the CICS environment
- Customizing the DB2 environment
- Customizing the IMS environment
- Customizing the Fault Analyzer Japanese feature
- Verifying Fault Analyzer customization
- Managing history files (IDIUTIL utility)
  The IDIUTIL batch utility can be used to perform history file management functions, such as listing and deleting history file fault entries.
- Providing application-specific explanations and descriptions
- Maintaining Fault Analyzer
- Disabling Fault Analyzer
- Customizing Fault Analyzer by using user exits
- Installing non-ISPF interfaces to access Fault Analyzer history files

Specifying a default JVM for Java dump analysis

Performing Java™ dump analysis requires a JVM that has a service level equal to, or greater than, the JVM that recorded the Java™ dump. Optional DD statements can specify default JVMs to use when the version of Java™ indicated by the dump JAVA_HOME path cannot be found on the system.

You can specify default JVMs by adding the IDIJVM, IDIJVM6, and IDIJVM11 DD statements to the IDIS subsystem JCL for Java™.

The IDIJVM DD statement specifies the path to a default 31-bit JVM.
The IDIJVM6 DD statement specifies the path to a default 64-bit JVM for Java 10 or earlier versions.
The IDIJVM11 DD statement specifies the path to a default 64-bit JVM for Java 11 or later versions.


//IDIJVM   DD   PATH='path'
//IDIJVM6  DD   PATH='path'
//IDIJVM11 DD   PATH='path'

Note: The Diagnostic Tool Framework for Java (DTFJ) has internal changes after Java 8. IDIJVM11 is a required DDname if co-existing with Java 8 64-bit applications.