Error 21

Open Server call to routine srv_spawn failed.

Symptom

This message is reported after a new connection has started:

ERROR #21 DSI(126 U10PDTE.u10pdte) - (1426) Open server
call to routine 'srv_spawn' failed.
Open Server error: Error: 16115, State: 0, Severity 10
-- 'Could not start thread'.

Explanation

Replication Server ran out of Open Server threads. srv_spawn allocates these threads. The maximum number of Open Server threads that a Replication Server can use is equal to the value specified by the num_threads parameter.

Solution

Increase the number of Open Server threads that the Replication Server can use by increasing the value of the num_threads parameter. For example:

configure replication server
      set num_threads to '70'