Oracle Error Message
ORA-26928: Unable to communicate with string apply coordinator process “string” from outbound server “string”.
Reason for the Error
A timeout occurred while waiting for apply coordinator to respond.
Solution
Check the state of the specified apply coordinator from GV$STREAMS_APPLY_COORDINATOR view. Determine the reason for apply coordinator’s unresponsiveness. If streams_pool_size is not set or set with an inadequate value, consider setting or increasing the value of this parameter.