1. add hostname env; 2. fix uwait use after free; Signed-off-by: haozi007 <liuhao27@huawei.com> (cherry picked from commit 1469344a5101a4ac55f2bc633535b82992798749)
Signed-off-by: zhangxiaoyu <zhangxiaoyu58@huawei.com> (cherry picked from commit b7b149d14e5151de48fbee2d43c12bdf9dd829cc)