CDH5 集群安装问题?报错

安装完CDH5rpm包之后，进入web页面，到安装集群这一步总是安装失败。

我看了详细信息里面的报错。如下：

>>[20/Jan/2017 11:22:03 +0000] 25669 MainThread agent INFO SCM Agent Version: 5.9.0
>>[20/Jan/2017 11:22:03 +0000] 25669 MainThread agent WARNING Expected mode 0751 for /var/run/cloudera-scm-agent but was 0755
>>[20/Jan/2017 11:22:03 +0000] 25669 MainThread agent INFO Re-using pre-existing directory: /var/run/cloudera-scm-agent
>>[20/Jan/2017 11:34:25 +0000] 27792 MainThread agent INFO SCM Agent Version: 5.9.0
>>[20/Jan/2017 11:34:25 +0000] 27792 MainThread agent WARNING Expected mode 0751 for /var/run/cloudera-scm-agent but was 0755
>>[20/Jan/2017 11:34:25 +0000] 27792 MainThread agent INFO Re-using pre-existing directory: /var/run/cloudera-scm-agent
>>[20/Jan/2017 11:59:56 +0000] 30049 MainThread agent INFO SCM Agent Version: 5.9.0
>>[20/Jan/2017 11:59:56 +0000] 30049 MainThread agent WARNING Expected mode 0751 for /var/run/cloudera-scm-agent but was 0755
>>[20/Jan/2017 11:59:56 +0000] 30049 MainThread agent INFO Re-using pre-existing directory: /var/run/cloudera-scm-agent
END (0)
BEGIN tail -n 50 /var/log/cloudera-scm-agent//cloudera-scm-agent.log | sed 's/^/>>/'
tail: cannot open `/var/log/cloudera-scm-agent//cloudera-scm-agent.log' for reading: No such file or directory
tail: cannot open `/var/log/cloudera-scm-agent//cloudera-scm-agent.log' for reading: No such file or directory
END (0)
end of agent logs.
scm agent could not be started, giving up
waiting for rollback request

我的cloudera-scm-agent服务也没有起来。谁能够帮忙解决下，都3天了。。。。。
在线等啊。。。。。。。。