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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

Z Abend Investigator installation and administration
- 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.
  - 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 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

HFZS subsystem requirements for Java

Ensure that data set HFZ.SHFZAUTH has been added to LINKLIST (for details, see Making Z Abend Investigator modules available). Failure to add HFZ.SHFZAUTH to LINKLIST prevents Z Abend Investigator from loading DLLs which are necessary for the analysis of Java™ faults. Also, message HFZ0158W is issued by the HFZS subsystem if this situation should occur.

The HFZS subsystem must have UPDATE access to at least the default history file in order to create a Java™ fault entry.