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Refresh Fails with Errors ORA-23324, ORA-03135 & ORA-02055 (Doc ID 1401266.1)

Last updated on FEBRUARY 21, 2024

Applies to:

Oracle Database - Standard Edition - Version and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.


On refreshing a Materialized View or running a query through a database link, it aborts with the following errors.

ORA-23324: error ORA-03135: connection lost contact
ORA-02055: distributed
update operation failed; rollback required
ORA-02063: preceding lines from DWH,
while creating deferror entry at "DWH" with error -3135

SQL Net traces shows the following :

[24-JAN-2012 12:19:57:000] nioqper: error from nioqsn
[24-JAN-2012 12:19:57:000] nioqper: ns main err code: 12547
[24-JAN-2012 12:19:57:000] nioqper: ns (2) err code: 12560
[24-JAN-2012 12:19:57:000] nioqper: nt main err code: 517
[24-JAN-2012 12:19:57:000] nioqper: nt (2) err code: 54
[24-JAN-2012 12:19:57:000] nioqper: nt OS err code: 0
[24-JAN-2012 12:19:57:000] nioqer: entry
[24-JAN-2012 12:19:57:000] nioqer: incoming err = 12150
[24-JAN-2012 12:19:57:000] nioqce: entry
[24-JAN-2012 12:19:57:000] nioqce: exit
[24-JAN-2012 12:19:57:000] nioqer: returning err = 3135
[24-JAN-2012 12:19:57:000] nioqer: exit
[24-JAN-2012 12:19:57:000] nioqsn: returning error: 3135
[24-JAN-2012 12:19:57:000] nioqsn: exit
[24-JAN-2012 12:19:57:000] nioqds: entry


The network administrator changed the VPN configuration to improve the efficiency of the TCP/IP network.
The changes performed by implementing the Nagle's algorithm which improves efficiency of TCP/IP networks by reducing the number of packets that need to be sent over the network..


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