IC61988: OUT OF MEMORY CONDITION CAN OCCUR IF HATS HOST SIMULATION RECORDING IS LEFT RUNNING FOR EXTENDED PERIODS OF TIME.

Rational Host Access Transformation Services, Version 7.1.0.5
Rational Host Access Transformation Services, Version 7.1.0.6
Rational Host Access Transformation Services, Version 7.5.0.2
Rational Host Access Transformation Services, Version 7.5.1.1
Rational Host Access Transformation Services, Version 7.5.1.2
Rational Host Access Transformation Services, version 7.5.1.3
Rational Host Access Transformation Services Fix Pack 4 (7.5.1.4) for 7.5.1
Rational Host Access Transformation Services Fix Pack 5 (7.5.1.5) for 7.5.1
Rational Host Access Transformation Services Fix Pack 6 (7.5.1.6) for 7.5.1

APAR status

• Closed as program error.

Error description

• Customer is running HATS 7.0 and has Host Simulation Recording
  turned on in their production environment.  Inermittently, they
  receive Out of Memory errors in the jvm, and review of heap
  dumps points to com/ibm/hats/common/connmgr/HostSimulatorMgr
  and com.ibm.hostsim.Recorder$RecHost.run for many instances
  using the heap analyzer tool.
  

Local fix

• Turn off Host Simulation Recording
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: HATS customers using Host Simulation         *
  *                 recording.                                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Out of Memory errors occur when         *
  *                      running HATS Host Simulation runtime    *
  *                      recording for long periods of time.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  HATS allows a customer to record a host simulation trace for
  runtime debug. This function uses a Java HashTable to store
  host simulation resources for each connection. HATS didn't
  release the host simulation resource from the hashtable
  when the application disconnected,
  so when a customer turned on this function in a long-running
  HATS  environment, the out of memory condition can occur.
  

Problem conclusion

• Remove the host simulation resource from HashTable when the
  HATS application is disconnected in the following cases:
  1. User clicks the disconnect button from the HATS web page.
  2. Session timeout, which is typically the case when a
  customer closes the browser directly without first
  disconnecting from the HATS application.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• HATSCOMM
  

Fix information

• Fixed component name

  HATS MULTI

• Fixed component ID

  5724L0200

Applicable component levels

• R700 PSY

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