于 2013-3-12 4:54, John Ferlan 写道: logic is: ret = get_dominfo(dom, &dominfo); if (!ret) { int active = virDomainIsActive(dom); if (active < 0) { /* ret > 1 indicate that it is recoverable */ CU_DEBUG("Failed to get dominfo, " "domain may not be active anymore."); ret = VSSD_ERROR_RECOVERABLE; } else { CU_DEBUG("Failed to get dominfo."); } goto out; } if it get_dominfo() fail, then check the reason. if virDomainIsActive() returns negative also, that means domain may not exist. if it succeed, but get_dominfo() fail, that means somethings bad happen below. I know this seems inreasonable, but I did observe the case for one VM, while it shows active but get xml fail, for underlining storage issue, in stress test. This is not perfect, let me check virConnectListAllDomains() case. Yep, let me check the API version of libvirt. -- Best Regards Wenchao Xia