Welcome
Z Abend Investigator installation and administration
Using the Z Abend Investigator HFZS subsystem
Z Abend Investigator uses a subsystem known as HFZS for services that can otherwise not be performed or which might cause incomplete analysis if not started.
Starting the HFZS subsystem
HFZS 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.

PDF documentation
About this document
Summary of changes
Using Z Abend Investigator
Z Abend Investigator installation and administration
- Migrating from an earlier version of Z Abend Investigator
- Preparing to customize Z Abend Investigator
- Customizing the operating environment for Z Abend Investigator
- Using the Z Abend Investigator HFZS subsystem
  Z Abend Investigator uses a subsystem known as HFZS for services that can otherwise not be performed or which might cause incomplete analysis if not started.
  - Sysplex-wide subsystem inter-communication
    Multiple HFZS 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 HFZS subsystem
    - HFZS subsystem storage requirements
    - HFZS subsystem requirements for DB2
    - HFZS subsystem requirements for Java
      - Specifying an HFZJLIB 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.
    - HFZS subsystem requirements for deletion of migrated tightly-coupled associated dump data sets
  - Stopping the HFZS subsystem
    The HFZS subsystem can be stopped and restarted at any time.
- Modifying your ISPF environment
- Customize Z Abend Investigator by using USERMODs
- Customize Z Abend Investigator by using an HFZOPTLM configuration-options module
- Setting up history files
  Z Abend Investigator 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 Z Abend Investigator side files
- Customizing the CICS environment
- Customizing the DB2 environment
- Customizing the IMS environment
- Customizing the Java environment
- Customizing the Z Abend Investigator Japanese feature
- Verifying Z Abend Investigator customization
- Managing history files (HFZUTIL utility)
  The HFZUTIL 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 Z Abend Investigator
- Disabling Z Abend Investigator
- Customizing Z Abend Investigator by using user exits
- Z Abend Investigator on VS Code
  HCL Z Abend Investigator is a host component and supports a client that supports various interfaces such as Microsoft Visual Studio Code IDEs.
Z Abend Investigator reference information
Sample customized ISPF interface front-end
Technical details for screen size adjustments
Notices
Glossary

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 HFZJVM, HFZJVM6, and HFZJVM11 DD statements to the HFZS subsystem JCL for Java™.

The HFZJVM DD statement specifies the path to a default 31-bit JVM.
The HFZJVM6 DD statement specifies the path to a default 64-bit JVM for Java 10 or earlier versions.
The HFZJVM11 DD statement specifies the path to a default 64-bit JVM for Java 11 or later versions.


//HFZJVM   DD   PATH='path'
//HFZJVM6  DD   PATH='path'
//HFZJVM11 DD   PATH='path'

Note:

The Diagnostic Tool Framework for Java (DTFJ) has internal changes after Java 8. HFZJVM11 is a required DDname if co-existing with Java 8 64-bit applications.