过去几天我一直在做这个错误。 当我做一个“yum更新”或基本上任何“yum”命令时，它是超时，花很长时间或基本上停止它。 我让Google上的所有人都能find解决scheme，而且没有任何帮助。 这是我的设置：
VMware ESXI 6.5主机这是一个在OVHnetworking上运行的CentOS 7虚拟机。
这是当我做一个百胜餐饮更新时给我的东西
Total download size: 100 M Is this ok [y/d/N]: y Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. warning: /var/cache/yum/x86_64/7/updates/packages/NetworkManager-libnm-1.4.0-20.el7_3.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY Public key for NetworkManager-libnm-1.4.0-20.el7_3.x86_64.rpm is not installed (1/71): NetworkManager-libnm-1.4.0-20.el7_3.x86_64.rpm | 443 kB 00:00 (2/71): NetworkManager-team-1.4.0-20.el7_3.x86_64.rpm | 147 kB 00:00 NetworkManager-tui-1.4.0-20.el FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/NetworkManager-tui-1.4.0-20.el7_3.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. (3/71): NetworkManager-wifi-1.4.0-20.el7_3.x86_64.rpm | 176 kB 00:00 NetworkManager-1.4.0-20.el7_3. FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/NetworkManager-1.4.0-20.el7_3.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/NetworkManager-1.4.0-20.el7_3.x86_64.rpm: (28, 'Connection timed out after 30000 milliseconds') Trying other mirror. (4/71): audit-2.6.5-3.el7_3.1.x86_64.rpm | 233 kB 00:00 (5/71): audit-libs-2.6.5-3.el7_3.1.x86_64.rpm | 85 kB 00:00 bash-4.2.46-21.el7_3.x86_64.rp FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/bash-4.2.46-21.el7_3.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/bash-4.2.46-21.el7_3.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. (6/71): bind-libs-lite-9.9.4-38.el7_3.3.x86_64.rpm | 730 kB 00:00 (7/71): bind-license-9.9.4-38.el7_3.3.noarch.rpm | 83 kB 00:00 (8/71): ca-certificates-2017.2.14-70.1.el7_3.noarch.rpm | 438 kB 00:00 (9/71): chkconfig-1.7.2-1.el7_3.1.x86_64.rpm | 175 kB 00:00 (10/71): chrony-2.1.1-4.el7.centos.x86_64.rpm | 281 kB 00:00 device-mapper-1.02.135-1.el7_3 FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/device-mapper-1.02.135-1.el7_3.5.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/device-mapper-1.02.135-1.el7_3.5.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. device-mapper-libs-1.02.135-1. FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/device-mapper-libs-1.02.135-1.el7_3.5.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/device-mapper-libs-1.02.135-1.el7_3.5.x86_64.rpm: (28, 'Resolving timed out after 30540 milliseconds') Trying other mirror. dmidecode-3.0-2.1.el7_3.x86_64 FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/dmidecode-3.0-2.1.el7_3.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: centos.mirror.iweb.ca; Name or service not known" Trying other mirror. dracut-033-463.el7_3.2.x86_64. FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/dracut-033-463.el7_3.2.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/dracut-033-463.el7_3.2.x86_64.rpm: (28, 'Resolving timed out after 30539 milliseconds') Trying other mirror. dracut-config-rescue-033-463.e FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/dracut-config-rescue-033-463.el7_3.2.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. firewalld-0.4.3.2-8.1.el7_3.3. FAILED http://centos.mirror.colo-serv.net/7.3.1611/updates/x86_64/Packages/firewalld-0.4.3.2-8.1.el7_3.3.noarch.rpm: [Errno 14] curl#7 - "Failed to connect to 2001:19c0:e:13::23: Network is unreachable" Trying other mirror. firewalld-filesystem-0.4.3.2-8 FAILED http://centos.mirror.vexxhost.com/7.3.1611/updates/x86_64/Packages/firewalld-filesystem-0.4.3.2-8.1.el7_3.3.noarch.rpm: [Errno 14] curl#7 - "Failed to connect to 2604:e100:1:0:f816:3eff:fe28:88d0: Network is unreachable" Trying other mirror. (11/71): gawk-4.0.2-4.el7_3.1.x86_64.rpm | 874 kB 00:00 (12/71): glibc-2.17-157.el7_3.4.x86_64.rpm | 3.6 MB 00:00 expat-2.1.0-10.el7_3.x86_64.rp FAILED http://centos.mirror.netelligent.ca/centos/7.3.1611/updates/x86_64/Packages/expat-2.1.0-10.el7_3.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.netelligent.ca/centos/7.3.1611/updates/x86_64/Packages/expat-2.1.0-10.el7_3.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. grubby-8.28-21.el7_3.x86_64.rp FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/grubby-8.28-21.el7_3.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. (13/71): irqbalance-1.0.7-6.el7_3.1.x86_64.rpm | 44 kB 00:00 (14/71): kernel-3.10.0-514.26.2.el7.x86_64.rpm | 37 MB 00:01 (15/71): kernel-tools-3.10.0-514.26.2.el7.x86_64.rpm | 4.0 MB 00:00 dracut-network-033-463.el7_3.2 FAILED http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/dracut-network-033-463.el7_3.2.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/dracut-network-033-463.el7_3.2.x86_64.rpm: (28, 'Resolving timed out after 30539 milliseconds') Trying other mirror. glibc-common-2.17-157.el7_3.4. FAILED http://centos.mirror.netelligent.ca/centos/7.3.1611/updates/x86_64/Packages/glibc-common-2.17-157.el7_3.4.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.netelligent.ca/centos/7.3.1611/updates/x86_64/Packages/glibc-common-2.17-157.el7_3.4.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. initscripts-9.49.37-1.el7_3.1. FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/initscripts-9.49.37-1.el7_3.1.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. krb5-libs-1.14.1-27.el7_3.x86_ FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/krb5-libs-1.14.1-27.el7_3.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. kernel-tools-libs-3.10.0-514.2 FAILED http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/kernel-tools-libs-3.10.0-514.26.2.el7.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/kernel-tools-libs-3.10.0-514.26.2.el7.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. kpartx-0.4.9-99.el7_3.3.x86_64 FAILED http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/kpartx-0.4.9-99.el7_3.3.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: centos.mirror.ca.planethoster.net; Name or service not known" Trying other mirror. (16/71): libblkid-2.23.2-33.el7_3.2.x86_64.rpm | 170 kB 00:10 libgcrypt-1.5.3-13.el7_3.1.x86 FAILED http://centos.mirror.iweb.ca/7.3.1611/updates/x86_64/Packages/libgcrypt-1.5.3-13.el7_3.1.x86_64.rpm: [Errno 14] curl#7 - "Failed to connect to 2607:f748:10:12:0:ce17:705:1: Network is unreachable" Trying other mirror. libgudev1-219-30.el7_3.9.x86_6 FAILED http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/libgudev1-219-30.el7_3.9.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/libgudev1-219-30.el7_3.9.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. (17/71): libmount-2.23.2-33.el7_3.2.x86_64.rpm | 172 kB 00:00 libnetfilter_conntrack-1.0.6-1 FAILED http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/libnetfilter_conntrack-1.0.6-1.el7_3.x86_64.rpm: [Errno 12] Timeout on http://centos.mirror.ca.planethoster.net/7.3.1611/updates/x86_64/Packages/libnetfilter_conntrack-1.0.6-1.el7_3.x86_64.rpm: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. (18/71): libnl3-3.2.28-3.el7_3.x86_64.rpm | 278 kB 00:00 帮助将不胜感激。
看起来是一个IPv6连接问题（将ip_resolve = ipv4添加到/etc/yum.conf来强制使用IPv4）。 这不起作用可能是gpg键validation失败。 给IPv4选项一个尝试。
检查互联网连接和带宽，试试这个：
yum clean all yum check yum erase apf yum upgrade