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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 AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

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 12.1.0.2.0 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.

Changes

Database upgraded from lower release to 12.1.0.2.0. 

Cause

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