fix: potential reference problem.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
minor change.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
add: pressure information;
add: changelogs.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
change: downgrade socket error to debug output.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>