服务器崩溃后如何从 java.io.EOFException 恢复 Zookeeper? [英] How to recover Zookeeper from java.io.EOFException after a server crash?

问题描述

如何从服务器崩溃后开始发生的以下错误中恢复?Zookeeper 无法启动，并且日志中重复显示以下消息.

How to recover from the following error that started happening after a server crash? Zookeeper won’t start and the following message is showing repeatedly on the log.

2017-05-27 01:02:08,072 [myid:] - INFO [main:Environment@100] - Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 
2017-05-27 01:02:08,072 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=/tmp 
2017-05-27 01:02:08,072 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA> 
2017-05-27 01:02:08,072 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Linux 
2017-05-27 01:02:08,072 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=amd64 
2017-05-27 01:02:08,073 [myid:] - INFO [main:Environment@100] - Server environment:os.version=3.10.0-514.16.1.el7.x86_64 
2017-05-27 01:02:08,073 [myid:] - INFO [main:Environment@100] - Server environment:user.name=zookeeper 
2017-05-27 01:02:08,073 [myid:] - INFO [main:Environment@100] - Server environment:user.home=/opt/zookeeper 
2017-05-27 01:02:08,073 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=/ 
2017-05-27 01:02:08,074 [myid:] - INFO [main:ZooKeeperServer@829] - tickTime set to 2000 
2017-05-27 01:02:08,074 [myid:] - INFO [main:ZooKeeperServer@838] - minSessionTimeout set to -1 
2017-05-27 01:02:08,074 [myid:] - INFO [main:ZooKeeperServer@847] - maxSessionTimeout set to -1 
2017-05-27 01:02:08,080 [myid:] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181 
2017-05-27 01:02:08,385 [myid:] - ERROR [main:Util@239] - Last transaction was partial. 
2017-05-27 01:02:08,400 [myid:] - ERROR [main:Util@239] - Last transaction was partial. 
2017-05-27 01:02:08,403 [myid:] - ERROR [main:Util@239] - Last transaction was partial. 
2017-05-27 01:02:08,403 [myid:] - ERROR [main:Util@239] - Last transaction was partial. 
2017-05-27 01:02:08,404 [myid:] - ERROR [main:Util@239] - Last transaction was partial. 
2017-05-27 01:02:08,404 [myid:] - ERROR [main:ZooKeeperServerMain@64] - Unexpected exception, exiting abnormally 
java.io.EOFException 
at java.io.DataInputStream.readInt(DataInputStream.java:392) 
at org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63) 
at org.apache.zookeeper.server.persistence.FileHeader.deserialize(FileHeader.java:64) 
at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.inStreamCreated(FileTxnLog.java:585) 
at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.createInputArchive(FileTxnLog.java:604) 
at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.goToNextLog(FileTxnLog.java:570) 
at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.next(FileTxnLog.java:652) 
at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:166) 
at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223) 
at org.apache.zookeeper.server.ZooKeeperServer.loadData(ZooKeeperServer.java:283) 
at org.apache.zookeeper.server.ZooKeeperServer.startdata(ZooKeeperServer.java:410) 
at org.apache.zookeeper.server.NIOServerCnxnFactory.startup(NIOServerCnxnFactory.java:118) 
at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:119) 
at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:87) 
at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:53) 
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116) 
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)

谢谢IPVP

推荐答案

您似乎遇到了一个已知的 Apache ZooKeeper 错误.有几个不同的 Apache JIRA 问题与此相关:ZOOKEEPER-1621 和 ZOOKEEPER-2332.如果您对根本原因分析和一些潜在的建议修复感兴趣，请查看这些问题中的评论.

It looks like you have encountered a known Apache ZooKeeper bug. There are a few different Apache JIRA issues related to this: ZOOKEEPER-1621 and ZOOKEEPER-2332. See the comments in those issues if you're interested in root cause analysis and some potential proposed fixes.

不幸的是，目前没有包含修复该错误的 Apache ZooKeeper 版本.您可以尝试一些潜在的解决方法:

Unfortunately, there is no Apache ZooKeeper release that contains a fix for the bug at this time. There are a few potential workarounds that you could try:

1. 使用附加到链接的 JIRA 问题的补丁之一创建您自己的 ZooKeeper 本地版本.请注意，这些补丁尚未被 ZooKeeper 社区接受，因此使用风险自负.
2. 删除有问题的日志文件.问题的根本原因是先前运行 ZooKeeper 的日志文件写入的标头不完整.由于头在文件的开头，而头本身是不完整的，我们可以假设在那之后日志文件中没有事务数据.因此，删除应该是安全的，不会造成任何数据丢失.
3. 如果更简单，您可以考虑重新格式化这个 ZooKeeper 集群.如果 ZooKeeper 安装中的所有数据都是短暂的并且不需要长期持久性，这可能是一个合适的解决方案.

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