zookeeper清理文件后启动报错排查

最新推荐文章于 2025-03-27 16:40:29 发布

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本文记录了一次ZooKeeper启动失败的排查过程，详细分析了启动错误的原因，并提供了有效的解决办法，即清理data和logs目录下的特定文件。

zookeeper启动错误排查

今天在练习zookeeper时，清理data目录下的内容后；
清理内容（停止服务后清理）：

version-2
zookeeper_server.pid

出现了启动错误，进行排查如下；

1、启动zk

[root@hdss-7-21 data]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/apache-zookeeper-3.5.8-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hdss-7-21 data]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/apache-zookeeper-3.5.8-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Error contacting service. It is probably not running.

可以看到启动时：started，但是在查看状态时：
Error contacting service. It is probably not running.

2、查看日志文件如下

2021-03-11 15:17:21,230 [myid:0] - ERROR [main:QuorumPeer@937] - Unable to load database on disk
java.io.IOException: No snapshot found, but there are log entries. Something is broken!
        at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:240)
        at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:240)
        at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:901)
        at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:887)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:205)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:123)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:82)
2021-03-11 15:17:21,232 [myid:0] - ERROR [main:QuorumPeerMain@101] - Unexpected exception, exiting abnormally
java.lang.RuntimeException: Unable to run quorum server 
        at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:938)
        at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:887)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:205)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:123)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:82)
Caused by: java.io.IOException: No snapshot found, but there are log entries. Something is broken!
        at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:240)
        at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:240)
        at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:901)
        ... 4 more

3、原因

不应该只清理data目录下的文件，还应该将logs目录下的文件一并清理（主要是：version-2）
将data目录的文件（处理myid外）和logs下的文件都清理之后启动服务并查看状态，正常

[root@hdss-7-21 apache-zookeeper-3.5.8-bin]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/apache-zookeeper-3.5.8-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hdss-7-21 apache-zookeeper-3.5.8-bin]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/apache-zookeeper-3.5.8-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[root@hdss-7-21 apache-zookeeper-3.5.8-bin]# jps
11478 QuorumPeerMain
15400 Jps

4、连接客户端查看

[root@hdss-7-21 kafka]# zkCli.sh 
...
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]

可以看到zk中已经没有了其他数据，只有zk的节点的了