1、虛擬機器開機黑屏

無法進入登入linux，提示the configuration defaults for gnome power manager have not been installed correctly

可能是磁碟滿造成的

使用命令

find / -size +200M -exec du -h {} \;檢視大於200M的檔案（首選刪除日誌檔案）。

查詢出來大檔案刪除即可，測試可用，如果不是太多大檔案導致磁碟滿，可以使用下一種方式

以管理員身份執行CMD-輸入netsh winsock reset 重啟即可，

2中方式大家可以試試

2、啟動zk報錯

he accepted epoch, d4 is less than the current epoch, d5

可能是記憶體不足：部署zookeeper的伺服器磁碟滿了，引起服務異常，

2018-05-07 10:33:58,556 [myid:3] - INFO  [main:[email protected]] - Reading snapshot /opt/data/zookeeper/version-2/snapshot.1900356f19
2018-05-07 10:33:58,966 [myid:3] - ERROR [main:[email protected]
 
] - Last transaction was partial.
2018-05-07 10:33:58,968 [myid:3] - ERROR [main:[email protected]] - Unable to load database on disk
java.io.IOException: The accepted epoch, 19 is less than the current epoch, 3a
    at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:645)
    at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:591)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:164)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:111)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
2018-05-07 10:33:58,970 [myid:3] - ERROR [main:
 
[email protected]] - Unexpected exception, exiting abnormally
java.lang.RuntimeException: Unable to run quorum server 
    at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:649)
    at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:591)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:164)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:111)
    at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
Caused by: java.io.IOException: The accepted epoch, 19 is less than the current epoch, 3a
    at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:645)
    ... 4 more

經過網上查詢，得到解決方法：
將zookeeper的version-2目錄備份一份，再重新建立一個新的version-2目錄，然後重新啟動zookeeper。

mv version-2.tmp

mkdir version-2

重啟即可，

希望可以幫助到大家