Question

我正在使用Zookeeper 3.4.6开发项目，并且正在执行一些失败模式测试。在这样做的同时，我发现了（我认为是）意想不到的行为。

如果领导者Zookeeper进程被杀死，是否应该重新开始追随者？

环境：

OS:        Windows Server 2008 R2 (hosted in a Tanuki Java service wrapper)
Zookeeper: 3.4.6
Java JDK:  1.7.0.210

试验：

测试是杀死Zookeeper进程并确保群集恢复。

如果我终止非领导者进程，它会重新启动并重新加入群集，而不会影响其他节点。

如果我杀了领导者进程，则领导和关注者重新启动。这似乎不对，因为有一段时间客户端无法连接到任何 Zookeeper节点。

我尝试了 TCP 和 UDP 通信设置，但两者都表现出相同的行为。 UDP的恢复速度是其两倍。

Zookeeper设置

tickTime=2000
initLimit=5
syncLimit=2
minSessionTimeout=5000
maxSessionTimeout=120000
dataDir=C:\\ProgramData\\Saab OneView\\ZooKeeper\\zoo-data
clientPort=2181
leaderServes=yes
autopurge.purgeInterval=24

# IP addresses blanked out here
server.1=0.0.0.1:2888:3888
server.2=0.0.0.2:2888:3888
server.3=0.0.0.3:2888:3888
server.4=0.0.0.4:2888:3888
server.5=0.0.0.5:2888:3888

# This is for zookeeper->zookeeper communication
# I've tried both settings, UDP has faster recovery time
# 0 = UDP 
# 3 = TCP (default)
electionAlg=3

导致关机的示例关注者异常

20160309 05:35:51.958Z 20160309 05:35:51.958 [myid:3] - WARN  [RecvWorker:4:QuorumCnxManager$RecvWorker@780] - Connection broken for id 4, my id = 3, error = 
java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocketInputStream.read(Unknown Source)
    at java.io.DataInputStream.readInt(Unknown Source)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager$RecvWorker.run(QuorumCnxManager.java:765)
20160309 05:35:51.959Z 20160309 05:35:51.959 [myid:3] - WARN  [RecvWorker:4:QuorumCnxManager$RecvWorker@783] - Interrupting SendWorker
20160309 05:35:51.959Z 20160309 05:35:51.959 [myid:3] - WARN  [QuorumPeer[myid=3]/0:0:0:0:0:0:0:0:2181:Follower@89] - Exception when following the leader
java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocketInputStream.read(Unknown Source)
    at java.io.BufferedInputStream.fill(Unknown Source)
    at java.io.BufferedInputStream.read(Unknown Source)
    at java.io.DataInputStream.readInt(Unknown Source)
    at org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
    at org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:83)
    at org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:103)
    at org.apache.zookeeper.server.quorum.Learner.readPacket(Learner.java:153)
    at org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:85)
    at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:786)
20160309 05:35:51.960Z 20160309 05:35:51.960 [myid:3] - INFO  [QuorumPeer[myid=3]/0:0:0:0:0:0:0:0:2181:Follower@166] - shutdown called
java.lang.Exception: shutdown Follower
    at org.apache.zookeeper.server.quorum.Follower.shutdown(Follower.java:166)
    at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:790)

如果zookeeper领导者进程被杀死，那么所有关注者是否都会获得异常并重启？

0 个答案: