add notify node change.

lichao

2021-06-29 6c07fe29a5185835f28059f627a1d30e462da28b

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*.un~
build/
debug/
release/
Makefile
utest/utest
*.bak
gmon.out
*/bhshmq_center
*/help
*/bhshmqbox
*/bhshmq_status
.idea