SDX 6.4.x Getting Started Guide > Distributing Directory Changes to SDX Components > Managing Directory Problems

Managing Directory Problems

When an SDX component communicates with the directory, that component may pass a time (known as a server timeout) to the directory to specify a time limit for the directory to respond. If the directory is not working correctly, however, it may not respond during this time, and will cause the SDX component to stop operating.

DES recovers if the directory is not working correctly. In addition, you can configure DES to prohibit communications with a directory if that directory repeatedly fails to respond. If you do so, DES starts the following procedure for all communication with the directory:

1. Assigns a client timeout to the communication.

The client timeout exceeds the server timeout.

2. If the directory does not respond during this time, DES closes the connection to the directory.
3. DES tries to reconnect to the directory and proceeds as follows:

• If DES cannot connect to the directory, it connects to the next available directory specified by the DES redundancy properties.
• If DES can connect to the directory, it contacts the directory again and repeats Steps 1 to 3.

4. If a directory fails to respond 10 times, DES prevents further communication with the directory.

To enable DES to prevent connection to a directory that repeatedly fails to respond, configure the enable_blacklist property.

enable_blacklist

• Specifies whether DES prevents connection to a directory if the directory fails to respond during 10 polls.
• Value

• True—DES prevents connection to the directory.
• False—DES does not prevent connection to the directory.

• Default—False
  

If DES prevents connection to a directory, do the following to reestablish the connection to the directory.

1. Fix the problem with the directory.
2. Restart the SDX component that communicates with this directory.