Known Problems

This section describes known problems and workarounds for Adaptive Server Enterprise Cluster Edition.

Table 1. Known nonplatform-specific Adaptive Server issues

CR #

Description

572710

Taking an engine offline while Java clients are connected may cause an error

If there are Adaptive Server users that are executing Java-in-SQL statements while you try to take the engine offline using sp_engine "offline", engine_id, Adaptive Server may report stack traces in its error log if the engine is hosting a JVM.

Workaround:Do not take the engine offline until Java clients are disconnected. Instead, take the engine offline that is not hosting the JVM.

574278

Timeslice error during disk init and disk resize

If you run disk init or disk resize involving file system devices, Adaptive Server may hit a timeslice error involving filesystem devices when you:


  • Issue a create database command using the device you just created, or
  • Activate a disk you just created after you restart the server.

Workaround: Increase the cpu grace time configuration parameter to give enough time for the operating system to flush all dirty buffers of the device that you are creating. The appropriate amount would depend on the disk speed and the amount of data being cached, but typically, a 10Gb device may require that you set the parameter to around 2500.

Once you initialize the disk and use it for the first time by issuing create database, you can reset the cpu grace time parameter back to its original value.

Warning!   Do not use Adaptive Server Cluster Edition on file system devices in a production environment; file system devices are for testing only.

572469

Task may get into an undetected deadlock

Under very rare circumstances, a task de-allocating a page may get into an undetected deadlock with another task trying to access the same page from another instance.

Workaround: Restart the instance.

549511

Cannot delete entered logical devices for audit tables in the auditinit utility

Workaround: Stop and restart the auditinit utility.

487525

Starting Unified Agent may report a permissions error

When you initially execute the uafstartup.sh script, you may receive an error stating that you do not have permissions to access some files. This occurs when starting the agents for the first time in the current $SYBASE directory only if starting multiple UAF agents at the same time. This problem is caused by latency issues in the NFS file system layer.

Workaround: Wait a few seconds, then retry.

333307

Blank spaces in an ldap server entry

If you have a blank space after your ldap server entry, dscp defaults to using the interfaces driver, and does not connect to an ldap server.

Workaround : Enable ldap by editing the $SYBASE/OCS-15_0/config/libtcl.cfg file to add the ldap server you plan to use.


Created June 19, 2009. Send feedback on this help topic to Sybase Technical Publications: pubs@sybase.com