What do I do if "Could not get a resource from the pool" is reported when I use JedisPool? - Function Compute

This topic describes the causes and solutions for the "Could not get a resource from the pool" error.

Problem description

Could not get a resource from the pool is reported when JedisPool is used in a Java runtime.

Possible cause

The whitelist of the ApsaraDB for Redis instance is incorrectly configured.
An error of another type occurred.

Solution

Find the log that start with Caused by: in the Cause Exception log. Troubleshoot the error based on the content of the log. The following sample code provides an example log:

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
  ....
Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR client ip is not in whitelist xxx:xxx

Note

If you cannot print logs started with Caused by: by using getStackTrace(), you can directly output the exception or use the getCause() method to print the logs.

ERR client ip is not in whitelist xxx:xxx

The whitelist of the ApsaraDB for Redis instance is incorrectly configured. You must reconfigure the whitelist. For more information, see Configure an IP address whitelist for a database.

Important

If the error occasionally occurs, check whether a security group is used to access the database. If a security group is used, connections to functions are unstable and services are affected. We recommend that you use an IP address-based whitelist.

Other errors

If other errors, such as Timeout waiting for idle object and Pool exhausted, are reported, see the following topics of ApsaraDB for Redis to troubleshoot: