"open files must not be less than 20000" Displayed During the OceanBase Cluster Startup

Symptom

The following message is displayed when the OceanBase cluster is started:

open files must be not be less than 20000(Current value: 1024)

Key Process and Cause Analysis

The maximum number of files in the configuration file is too small. As a result, when the number of opened files exceeds the maximum number, the operation fails.

Conclusion and Solution

1. Run the following command on the server CLI:

   cat >> /etc/security/limits.conf << EOF 
   *       soft    nofile  655350 
   *       hard    nofile  655350 
   EOF

2. Log in to the server again for the configuration in step 1 to take effect.
3. Check the current value of open files.

   ulimit -n 

   If 655350 is returned, the configuration is successful.