STREAMING APPLICATION UPDATE METHOD, MASTER NODE, AND STREAM COMPUTING SYSTEM

The present invention provides a streaming application upgrading method and a stream computing system, where the method includes: obtaining a updated logical model of a streaming application, and determining a to-be-adjusted stream by comparing the updated logical model with an initial logical model; generating an upgrading instruction according to the to-be-adjusted stream; and delivering the generated upgrading instruction to a worker node, so that the worker node adjusts, according to an indication of the upgrading instruction, a stream between PEs distributed on the worker node. The method provided in the present invention can upgrade the streaming application online without interrupting a service.