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Alarming Increase In The IOC_MAKE_SUB2 Component of JAVA_POOL Or ORA-00600 [729]/[17182], [space leak] Error Observed In Alert Log (Doc ID 2404895.1)

Last updated on MARCH 04, 2019

Applies to:

Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Information in this document applies to any platform.


The IOC_MAKE_SUB2 component of the JAVA_POOL is growing consistently over a period of time and leads to lots of ORA-4031 errors in the alert log.The growth can be either minimal or alarming growth over a period of time.Apart from ORA-04031 errors, the alert log may also contain 'ORA-00600: internal error code, arguments: [729]/[17182], [XXXX], [space leak]", where XXXX can be anything.

Following are the typical symptoms of this issue:

  1. Database is on version.
  2. Database is running in shared server mode. In dedicated mode the issue is not seen.
  3. Oracle JVM component is installed and in VALID state. There may or may not be any custom or third party java classes loaded in the database.In other words, the issue can happen only with Oracle JVM component installed without any other Java objects in the database.


Database upgraded from lower release to 


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