Article ID: 904632
Article Last Modified on 12/4/2007
APPLIES TO
- Microsoft Host Integration Server 2004 Standard Edition
SYMPTOMS
When a Microsoft Host Integration Server administrator saves configuration changes in a large Host Integration Server configuration, you may experience the following behavior:
- Host Integration Server clients receive the following error message when the client SnaBase process tries to connect to the SnaBase service on a computer that is running Host Integration Server 2004:
- Host Integration Server clients that start SNA applications, such as a 3270 emulator, may experience unusually long delays before the application can obtain a host session.
- The SnaBase service on the Host Integration Server 2004-based servers will experience increased CPU utilization and memory use as long as the updated Host Integration Server configuration file (Com.cfg) is processed.
You may experience this behavior for several seconds or for more than 30 minutes.
CAUSE
This problem occurs because the SnaBase process locks the newly updated Host Integration Server configuration database as long as the database is read to memory. This behavior causes a deadlock because any other threads that require the lock stop responding until the lock is released.
RESOLUTION
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:
Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name ---------------------------------------------------- 02-Aug-2005 23:53 6.0.1975.0 215,040 Snabase.exe
Note Because of file dependencies, the most recent fix that contains these files may also contain additional files.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
You may not experience this problem with all large Host Integration Server configurations. The problem cannot be isolated to a specific number of objects that are contained in the configuration file. The problem also cannot be isolated to a specific Com.cfg file size.
The size of the Com.cfg file, the number of configuration objects, and the types of configuration objects all help determine how long Host Integration Server 2004 re-reads an updated configuration into memory. You experience the problem that is mentioned in the "Symptoms" section as long as the configuration file is re-read into memory.
Keywords: kbbug kbfix kbqfe kbpubtypekc kbhotfixserver KB904632
