zookeeperは起動できません.「Unable to load database on disk」と報告します.

問題の説明:zookeeperを配備するサーバーのディスクがいっぱいになって、サービスの異常を引き起こして、zookeeperプロセスを殺した後に、zookeeperを再起動して起動する時に成功したことを表示します:

[root@slave-2 bin]# ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

しかしzookeeperのプロセスもポートも起きていません.
見てみろout、エラーメッセージを発見したのは以下の通りです.

2018-05-07 10:33:58,556 [myid:3] - INFO  [main:FileSnap@83] - Reading snapshot /opt/data/zookeeper/version-2/snapshot.1900356f19
2018-05-07 10:33:58,966 [myid:3] - ERROR [main:Util@239] - Last transaction was partial.
2018-05-07 10:33:58,968 [myid:3] - ERROR [main:QuorumPeer@648] - 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:QuorumPeerMain@89] - 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
[root@slave-2 bin]# 

オンライン検索により、zookeeperのversion-2ディレクトリをバックアップし、新しいversion-2ディレクトリを再作成し、zookeeperを再起動します.
操作は次のとおりです.

[root@slave-2 zookeeper]# ll
total 28
-rw-r--r-- 1 root root     2 Aug 30  2017 myid
drwxr-xr-x 2 root root 24576 May  7 10:36 version-2
-rw-r--r-- 1 root root     5 May  7 10:42 zookeeper_server.pid
[root@slave-2 zookeeper]# mv version-2 version-2.bak
[root@slave-2 zookeeper]# ll
total 28
-rw-r--r-- 1 root root     2 Aug 30  2017 myid
drwxr-xr-x 2 root root 24576 May  7 10:36 version-2.bak
-rw-r--r-- 1 root root     5 May  7 10:42 zookeeper_server.pid
[root@slave-2 zookeeper]# mkdir version-2
[root@slave-2 zookeeper]# ll
total 28
-rw-r--r-- 1 root root     2 Aug 30  2017 myid
drwxr-xr-x 2 root root     6 May  7 10:44 version-2
drwxr-xr-x 2 root root 24576 May  7 10:36 version-2.bak
-rw-r--r-- 1 root root     5 May  7 10:42 zookeeper_server.pid

zookeeperを再起動します.

[root@slave-2 bin]# ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@slave-2 bin]# netstat -tlunp|grep 2181
tcp6       0      0 :::2181                 :::*                    LISTEN      32695/java

転載先:https://blog.51cto.com/10950710/2113493