IDS Forum

9.4 and red hat 8.0 gotcha

Posted By: cberner99@juno.com
Date: Friday, 23 April 2004, at 4:55 p.m.

HI All,

I thought I send in case any one would upgrade to these platforms.

Software > Support >

Checkpoints stuck, onstats fail, engine not responding on Red Hat Linux

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Abstract
Memory structures become corrupted when using TCP/IP connections on Red Hat Linux 8.0. The corruption can cause various engine processes to stop responding.

Content

PROBLEM

When using a TCP/IP connection, memory structures in IBM Informix Dynamic Server (IDS) become corrupted. This can lead to many different symptoms including the following:

Checkpoints remain in a blocked state for a long time. This usually occurs when you try to run more than three queries at the same time.

The engine stops responding to requests (hangs).

When running onstat you get the following error:
Changing data structure forced command termination.

It is normal to get this error occasionally but if you get it persistently it is a symptom of this problem.

Ontape stops responding (hangs) while restoring or creating an archive.


SCOPE

The following products and platforms are effected:

Product Name Product Version(s) Hardware Vendor Operating System
IBM Informix Dynamic Server™ (IDS) 9.40.UC1
9.40.UC2
All Red Hat Linux 8.0
kernel version 2.4.18-14
glibc version 2.2.93-5


CAUSE

The data table corruption occurs due to a TCP/IP problem found in the glibc package shipped with Red Hat 8.0.


IMPACT

It is unlikely that this problem will cause data corruption, but some operations performed by the engine may not complete. This could cause some data to be lost.


SOLUTION

Upgrade the glibc package to version 2.3.2-4.80.6. The newer version of glibc is available from Red Hat.

See the Related Information section below for two links to the library.

A fix for this problem will be included in 9.40.UC3.

This version has been released as of 01/19/2004

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