By default, only one loading job may run at a time. Additional job requests are held in a wait queue. You can increase the number of concurrent active jobs by changing the following configurations:

For local file loading:

For Kafka Loader loading:

You can also configure how many resources are permitted to work on loading jobs.

Tasks per CPU (for KafkaConnect)

This parameter sets the average CPU workload per server, in a distributed cluster. The allowed range is [0.5, 10], but we recommend going no higher than 2. The default value is 1.5. In a 4-server cluster, that means the maximum number of Kafka connector tasks is

0.5 * 4 = 2.

If you get an error message saying that the Connector has hit the upper limit on the number of tasks, you can slightly increase the limit to allow more connector tasks.