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Client Connection Fails with ORA-04030 (QERHJ hash-joi,kllcqas:kllsltba) (Doc ID 470604.1)

Last updated on FEBRUARY 01, 2022

Applies to:

Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup 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
IBM AIX on POWER Systems (64-bit)
AIX5L Based Systems (64-bit)


When executed from a SQL Net client, an Oracle statement can fail with error

ORA-04030 (QERHJ hash-joi,kllcqas:kllsltba)

However, the same request is running fine when launched from the Unix environment (local connection).


The error in this case is an AIX platform specific issue and it occurs because of an OS resource limitation.

Initially, increased the parameter MAXUPROC to 8192 and restart the listener.

The OS commands in order to find the current maxuproc value and change it:



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