Runtime error: Could not create thread: Resource temporarily unavailable (error 11)

You may encounter this error when Kudu is unable to create more threads, usually on versions older than Kudu 1.7. It happens on tablet servers, and is a sign that the tablet server hosts too many tablet replicas.

To fix the issue, you can raise the nproc ulimit as detailed in the documentation for your operating system or distribution.

However, the better solution is to reduce the number of replicas on the tablet server. This may involve rethinking the table's partitioning schema. For the recommended limits on number of replicas per tablet server, see the Scaling recommendations and limitations topic.