docker部署kafka zookeeper模式集群
单机模式链接：https://blog.csdn.net/wsdhla/article/details/133032238
kraft集群模式链接：部署Kafka_kafka 部署-CSDN博客
zookeeper选举机制举例：
目前有5台服务器，每台服务器均没有数据，它们的编号分别是1,2,3,4,5,按编号依次启动，它们的选择举过程如下：
- 服务器1启动，给自己投票，然后发投票信息，由于其它机器还没有启动所以它收不到反馈信息，服务器1的状态一直属于Looking(选举状态)。
- 服务器2启动，给自己投票，同时与之前启动的服务器1交换结果，由于服务器2的编号大所以服务器2胜出，但此时投票数没有大于半数，所以两个服务器的状态依然是LOOKING。
- 服务器3启动，给自己投票，同时与之前启动的服务器1,2交换信息，由于服务器3的编号最大所以服务器3胜出，此时投票数正好大于半数，所以服务器3成为领导者，服务器1,2成为小弟。
- 服务器4启动，给自己投票，同时与之前启动的服务器1,2,3交换信息，尽管服务器4的编号大，但之前服务器3已经胜出，所以服务器4只能成为小弟。
- 服务器5启动，后面的逻辑同服务器4成为小弟。
Docker 自定义静态网络
Docker默认提供了3种网络模式，生成容器时不指定网络模式下默认使用bridge桥接模式。每次容器启动时ip会发生变更，无法达到我们集群的效果。
创建自定义网络模式，指定网段。
docker network create --subnet=172.18.0.0/16 net-kafka若报错：Error response from daemon: Pool overlaps with other one on this address space
说明指定的网络地址段已存在
1、Docker部署zookeeper集群
zk使用官方镜像：
1.1、主机创建目录
[zk01]
D:/mysoft/dev/docker-zk-cluster/zk01/conf
D:/mysoft/dev/docker-zk-cluster/zk01/data
D:/mysoft/dev/docker-zk-cluster/zk01/datalog
[zk02]
D:/mysoft/dev/docker-zk-cluster/zk02/conf
D:/mysoft/dev/docker-zk-cluster/zk02/data
D:/mysoft/dev/docker-zk-cluster/zk02/datalog
[zk03]
D:/mysoft/dev/docker-zk-cluster/zk03/conf
D:/mysoft/dev/docker-zk-cluster/zk03/data
D:/mysoft/dev/docker-zk-cluster/zk03/datalog1.2、修改配置文件
分别拷贝到zk01、zk02、zk03
[zoo.cfg]
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
server.1=172.18.0.11:2888:3888;2181
server.2=172.18.0.12:2888:3888;2181
server.3=172.18.0.13:2888:3888;21811.3、指定ip创建启动容器
docker run -d --name zk01 -p 2181:2181 --network net-kafka --ip 172.18.0.11 -v D:/mysoft/dev/docker-zk-cluster/zk01/conf:/conf -v D:/mysoft/dev/docker-zk-cluster/zk01/data:/data -v D:/mysoft/dev/docker-zk-cluster/zk01/datalog:/datalog zookeeper
docker run -d --name zk02 -p 2182:2181 --network net-kafka --ip 172.18.0.12 -v D:/mysoft/dev/docker-zk-cluster/zk02/conf:/conf -v D:/mysoft/dev/docker-zk-cluster/zk02/data:/data -v D:/mysoft/dev/docker-zk-cluster/zk02/datalog:/datalog zookeeper
docker run -d --name zk03 -p 2183:2181 --network net-kafka --ip 172.18.0.13 -v D:/mysoft/dev/docker-zk-cluster/zk03/conf:/conf -v D:/mysoft/dev/docker-zk-cluster/zk03/data:/data -v D:/mysoft/dev/docker-zk-cluster/zk03/datalog:/datalog zookeeperzk01可以正常启动，zk02和zk03启动失败
警告：这个正常，是因为节点启动时选举机制的原因
zk02：
WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 2 at election address /172.18.0.12:3888
zk03：
WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 3 at election address /172.18.0.13:3888
异常：
zk02：
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - Exception while listening to address /172.18.0.11:3888
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - Leaving listener thread for address 172.18.0.11:3888 after 3 errors. Use zookeeper.electionPortBindRetry property to increase retry count.
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - As I'm leaving the listener thread, I won't be able to participate in leader election any longer: 172.18.0.11:3888
zk03：
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - Exception while listening to address /172.18.0.11:3888
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - Leaving listener thread for address 172.18.0.11:3888 after 3 errors. Use zookeeper.electionPortBindRetry property to increase retry count.
ERROR org.apache.zookeeper.server.quorum.QuorumCnxManager - As I'm leaving the listener thread, I won't be able to participate in leader election any longer: 172.18.0.11:3888
原因是没有配置quorumListenOnAllIPs，默认为false，需要设置为true
[zoo.cfg]
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
quorumListenOnAllIPs=true
server.1=172.18.0.11:2888:3888;2181
server.2=172.18.0.12:2888:3888;2181
server.3=172.18.0.13:2888:3888;2181quorumListenOnAllIPs：
当设置为true时，ZooKeeper服务器将在所有可用IP地址上侦听来自其对等方的连接，而不仅是在配置文件的服务器列表中配置的地址。它会影响处理ZAB协议和快速领导者选举协议的连接。默认值为false。
有一些WARN:
### 1、只启动zk01：
# zk01：
01:21:17.746 [QuorumConnectionThread-[myid=1]-3] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 2 at election address /172.18.0.12:3888
java.net.NoRouteToHostException: No route to host (Host unreachable)
01:21:20.904 [QuorumConnectionThread-[myid=1]-1] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 3 at election address /172.18.0.13:3888
java.net.NoRouteToHostException: No route to host (Host unreachable)
### 2、 只启动zk01、zk02：
# zk01：
01:21:46.504 [QuorumConnectionThread-[myid=1]-3] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 3 at election address /172.18.0.13:3888
java.net.NoRouteToHostException: No route to host (Host unreachable)
# zk02：
01:21:43.350 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
01:21:48.824 [QuorumConnectionThread-[myid=1]-2] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - Cannot open channel to 3 at election address /172.18.0.13:3888
java.net.NoRouteToHostException: No route to host (Host unreachable)
### 2、 启动zk01、zk02、zk03：
# zk01正常：
01:31:34.579 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:31:34.579 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:31:34.580 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 2 already, it is in the lastCommittedView
01:31:34.584 [QuorumConnectionThread-[myid=1]-21] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 2
01:31:34.584 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 3 already, it is in the lastCommittedView
01:31:34.585 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] INFO org.apache.zookeeper.server.quorum.FastLeaderElection - Notification time out: 60000 ms
01:31:34.585 [QuorumConnectionThread-[myid=1]-22] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 3
01:31:34.585 [QuorumConnectionThread-[myid=1]-21] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 2 using election address: /172.18.0.12:3888
01:31:34.585 [QuorumConnectionThread-[myid=1]-21] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:2)
01:31:34.586 [QuorumConnectionThread-[myid=1]-21] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:2)
01:31:34.585 [QuorumConnectionThread-[myid=1]-22] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 3 using election address: /172.18.0.13:3888
01:31:34.586 [QuorumConnectionThread-[myid=1]-22] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:3)
01:31:34.586 [QuorumConnectionThread-[myid=1]-22] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:3)
01:31:52.173 [Session-HouseKeeper-383bfa16-1] DEBUG org.eclipse.jetty.server.session - node0 scavenging sessions
01:31:52.174 [Session-HouseKeeper-383bfa16-1] DEBUG org.eclipse.jetty.server.session - org.eclipse.jetty.server.session.SessionHandler873610597==dftMaxIdleSec=-1 scavenging sessions
01:31:52.174 [Session-HouseKeeper-383bfa16-1] DEBUG org.eclipse.jetty.server.session - org.eclipse.jetty.server.session.SessionHandler873610597==dftMaxIdleSec=-1 scavenging session ids []
01:31:52.174 [Session-HouseKeeper-383bfa16-1] DEBUG org.eclipse.jetty.server.session - org.eclipse.jetty.server.session.DefaultSessionCache@57d7f8ca[evict=-1,removeUnloadable=false,saveOnCreate=false,saveOnInactiveEvict=false] checking expiration on []
# zk02：
01:35:15.331 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:35:15.332 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:35:15.333 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 2 already, it is in the lastCommittedView
01:35:15.334 [QuorumConnectionThread-[myid=1]-27] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 2
01:35:15.334 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 3 already, it is in the lastCommittedView
01:35:15.335 [QuorumConnectionThread-[myid=1]-27] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 2 using election address: /172.18.0.12:3888
01:35:15.335 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] INFO org.apache.zookeeper.server.quorum.FastLeaderElection - Notification time out: 60000 ms
01:35:15.335 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.12:50246
01:35:15.335 [QuorumConnectionThread-[myid=1]-27] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:2)
01:35:15.335 [QuorumConnectionThread-[myid=1]-28] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 3
01:35:15.335 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.12:50246
01:35:15.335 [QuorumConnectionThread-[myid=1]-27] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:2)
01:35:15.335 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:35:15.335 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
01:35:15.335 [QuorumConnectionThread-[myid=1]-28] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 3 using election address: /172.18.0.13:3888
01:35:15.335 [QuorumConnectionThread-[myid=1]-28] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:3)
01:35:15.336 [QuorumConnectionThread-[myid=1]-28] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:3)
01:35:34.600 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.11:49750
01:35:34.601 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.11:49750
01:35:34.601 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:35:34.601 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
01:35:59.199 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.13:56956
01:35:59.200 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.13:56956
01:35:59.200 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:35:59.200 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
# zk03：
01:36:59.201 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:36:59.201 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Queue size: 1
01:36:59.202 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 2 already, it is in the lastCommittedView
01:36:59.202 [QuorumConnectionThread-[myid=1]-15] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 2
01:36:59.203 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Server 1 knows 3 already, it is in the lastCommittedView
01:36:59.203 [QuorumConnectionThread-[myid=1]-15] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 2 using election address: /172.18.0.12:3888
01:36:59.203 [QuorumConnectionThread-[myid=1]-15] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:2)
01:36:59.203 [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=disabled)] INFO org.apache.zookeeper.server.quorum.FastLeaderElection - Notification time out: 60000 ms
01:36:59.203 [QuorumConnectionThread-[myid=1]-16] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Opening channel to server 3
01:36:59.203 [QuorumConnectionThread-[myid=1]-15] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:2)
01:36:59.204 [QuorumConnectionThread-[myid=1]-16] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Connected to server 3 using election address: /172.18.0.13:3888
01:36:59.204 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.13:35192
01:36:59.204 [QuorumConnectionThread-[myid=1]-16] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - startConnection (myId:1 --> sid:3)
01:36:59.204 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.13:35192
01:36:59.204 [QuorumConnectionThread-[myid=1]-16] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Have smaller server identifier, so dropping the connection: (myId:1 --> sid:3)
01:36:59.204 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:36:59.205 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
01:37:15.342 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.12:35956
01:37:15.342 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.12:35956
01:37:15.342 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:37:15.342 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
01:37:34.609 [ListenerHandler-0.0.0.0/0.0.0.0:3888] INFO org.apache.zookeeper.server.quorum.QuorumCnxManager - Received connection request from /172.18.0.11:46420
01:37:34.609 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Sync handling of connection request received from: /172.18.0.11:46420
01:37:34.609 [ListenerHandler-0.0.0.0/0.0.0.0:3888] DEBUG org.apache.zookeeper.server.quorum.QuorumCnxManager - Initial message parsed by 1: InitialMessage{sid=1, electionAddr=[/172.18.0.11:3888]}
01:37:34.609 [ListenerHandler-0.0.0.0/0.0.0.0:3888] WARN org.apache.zookeeper.server.quorum.QuorumCnxManager - We got a connection request from a server with our own ID. This should be either a configuration error, or a bug.
找到原因了，因为data/myid没有修改，目前3个节点的配置全部为1，分别改为1、2、3就正常了。
启动zkui
docker run -d --name zkui -p 9090:9090 --network net-kafka -e ZKLIST=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 maauso/zkui访问localhost:9090，登录之后报错：KeeperErrorCode = ConnectionLoss for /
删除data\version-2\snapshot.0依然不行
stat is not executed because it is not in the whitelist.
envi is not executed because it is not in the whitelist.
4lw.commands.whitelist=*
16:49:58.466 [NIOWorkerThread-10] DEBUG org.apache.zookeeper.server.NIOServerCnxn - Closed socket connection for client /172.18.0.2:42978 (no session established for client)
16:49:58.499 [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181] DEBUG org.apache.zookeeper.server.NIOServerCnxnFactory - Accepted socket connection from /172.18.0.2:42980
16:49:58.500 [NIOWorkerThread-11] WARN org.apache.zookeeper.server.NIOServerCnxn - Close of session 0x0
java.io.IOException: ZooKeeperServer not running
at org.apache.zookeeper.server.NIOServerCnxn.readLength(NIOServerCnxn.java:569)
at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:349)
at org.apache.zookeeper.server.NIOServerCnxnFactory$IOWorkRequest.doWork(NIOServerCnxnFactory.java:508)
at org.apache.zookeeper.server.WorkerService$ScheduledWorkRequest.run(WorkerService.java:153)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)好像改为zk的data/myid配置，上面的问题就没有了。
2、Docker部署kafka集群
kafka没有官方镜像，使用wurstmeister/kafka镜像
2.1、主机创建目录
[kafka01]
D:/mysoft/dev/docker-kafka-cluster/kafka01/config
D:/mysoft/dev/docker-kafka-cluster/kafka01/data
D:/mysoft/dev/docker-kafka-cluster/kafka01/logs
D:/mysoft/dev/docker-kafka-cluster/kafka01/hosts
[kafka02]
D:/mysoft/dev/docker-kafka-cluster/kafka02/config
D:/mysoft/dev/docker-kafka-cluster/kafka02/data
D:/mysoft/dev/docker-kafka-cluster/kafka02/logs
D:/mysoft/dev/docker-kafka-cluster/kafka02/hosts
[kafka03]
D:/mysoft/dev/docker-kafka-cluster/kafka03/config
D:/mysoft/dev/docker-kafka-cluster/kafka03/data
D:/mysoft/dev/docker-kafka-cluster/kafka03/logs
D:/mysoft/dev/docker-kafka-cluster/kafka03/hosts2.2、修改配置文件
分别拷贝到kafka01、kafka02、kafka03
[server.properties]
broker.id=1
advertised.listeners=PLAINTEXT://172.18.0.21:9092
# port=9092
# log.dirs=/kafka/kafka-logs-1ddafafe54d0
listeners=PLAINTEXT://0.0.0.0:9092
zookeeper.connect=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:21812.3、指定ip创建启动容器
# docker run -d --name kafka01 --restart=always --net=host -v D:/mysoft/dev/docker-kafka-cluster/kafka01/hosts:/etc/hosts -v D:/mysoft/dev/docker-kafka-cluster/kafka01/data:/opt/kafka/data -v D:/mysoft/dev/docker-kafka-cluster/kafka01/config:/opt/kafka/config -v D:/mysoft/dev/docker-kafka-cluster/kafka01/logs:/opt/kafka/logs -e KAFKA_ADVERTISED_HOST_NAME=192.168.180.42 -e JMX_PORT=9999 -e HOST_IP=127.0.0.1 -e KAFKA_ADVERTISED_PORT=9092 -e KAFKA_ZOOKEEPER_CONNECT=127.0.0.1:2181 -e KAFKA_BROKER_ID=1 -e KAFKA_HEAP_OPTS="-Xmx6G -Xms6G" wurstmeister/kafka
# docker run -d --name kafka01 --restart=always --network net-kafka --ip 172.18.0.21 -v D:/mysoft/dev/docker-kafka-cluster/kafka01/hosts:/etc -v D:/mysoft/dev/docker-kafka-cluster/kafka01/data:/opt/kafka/data -v D:/mysoft/dev/docker-kafka-cluster/kafka01/config:/opt/kafka/config -v D:/mysoft/dev/docker-kafka-cluster/kafka01/logs:/opt/kafka/logs -e KAFKA_ADVERTISED_HOST_NAME=172.18.0.21 -e KAFKA_ADVERTISED_PORT=9092 -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://172.18.0.21:9092 -e KAFKA_LISTENERS=PLAINTEXT://0.0.0.0:9092 -e KAFKA_ZOOKEEPER_CONNECT=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 -e KAFKA_BROKER_ID=1 -e KAFKA_LOG_DIRS=/opt/kafka/logs wurstmeister/kafka
docker run -d --name kafka01 -p 9192:9092 --restart=always --network net-kafka --ip 172.18.0.21 -v D:/mysoft/dev/docker-kafka-cluster/kafka01/hosts:/etc -v D:/mysoft/dev/docker-kafka-cluster/kafka01/data:/opt/kafka/data -v D:/mysoft/dev/docker-kafka-cluster/kafka01/config:/opt/kafka/config -v D:/mysoft/dev/docker-kafka-cluster/kafka01/logs:/opt/kafka/logs -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://172.18.0.21:9092 -e KAFKA_LISTENERS=PLAINTEXT://0.0.0.0:9092 -e KAFKA_ZOOKEEPER_CONNECT=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 -e KAFKA_BROKER_ID=1 wurstmeister/kafka
docker run -d --name kafka02 -p 9292:9092 --restart=always --network net-kafka --ip 172.18.0.22 -v D:/mysoft/dev/docker-kafka-cluster/kafka02/hosts:/etc -v D:/mysoft/dev/docker-kafka-cluster/kafka02/data:/opt/kafka/data -v D:/mysoft/dev/docker-kafka-cluster/kafka02/config:/opt/kafka/config -v D:/mysoft/dev/docker-kafka-cluster/kafka02/logs:/opt/kafka/logs -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://172.18.0.22:9092 -e KAFKA_LISTENERS=PLAINTEXT://0.0.0.0:9092 -e KAFKA_ZOOKEEPER_CONNECT=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 -e KAFKA_BROKER_ID=2 wurstmeister/kafka
docker run -d --name kafka03 -p 9392:9092 --restart=always --network net-kafka --ip 172.18.0.23 -v D:/mysoft/dev/docker-kafka-cluster/kafka03/hosts:/etc -v D:/mysoft/dev/docker-kafka-cluster/kafka03/data:/opt/kafka/data -v D:/mysoft/dev/docker-kafka-cluster/kafka03/config:/opt/kafka/config -v D:/mysoft/dev/docker-kafka-cluster/kafka03/logs:/opt/kafka/logs -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://172.18.0.23:9092 -e KAFKA_LISTENERS=PLAINTEXT://0.0.0.0:9092 -e KAFKA_ZOOKEEPER_CONNECT=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 -e KAFKA_BROKER_ID=3 wurstmeister/kafkakafka容器异常，一直自动反复重启，UP状态维持1分钟左右
[Configuring] 'advertised.listeners' in '/opt/kafka/config/server.properties'
[Configuring] 'port' in '/opt/kafka/config/server.properties'
Excluding KAFKA_HOME from broker config
[Configuring] 'log.dirs' in '/opt/kafka/config/server.properties'
[Configuring] 'listeners' in '/opt/kafka/config/server.properties'
Excluding KAFKA_VERSION from broker config
[Configuring] 'zookeeper.connect' in '/opt/kafka/config/server.properties'
[Configuring] 'broker.id' in '/opt/kafka/config/server.properties'
log4j:ERROR Could not read configuration file from URL [file:/opt/kafka/bin/../config/log4j.properties].
java.io.FileNotFoundException: /opt/kafka/bin/../config/log4j.properties (No such file or directory)
at java.base/java.io.FileInputStream.open0(Native Method)
at java.base/java.io.FileInputStream.open(Unknown Source)
at java.base/java.io.FileInputStream.(Unknown Source)
at java.base/java.io.FileInputStream.(Unknown Source)
at java.base/sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at java.base/sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:557)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
at org.apache.log4j.LogManager.(LogManager.java:127)
at org.slf4j.impl.Log4jLoggerFactory.(Log4jLoggerFactory.java:66)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:72)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:45)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:417)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:362)
at com.typesafe.scalalogging.Logger$.apply(Logger.scala:48)
at kafka.utils.Log4jControllerRegistration$.(Logging.scala:25)
at kafka.Kafka$.(Kafka.scala:30)
at kafka.Kafka.main(Kafka.scala)
log4j:ERROR Ignoring configuration file [file:/opt/kafka/bin/../config/log4j.properties].
log4j:WARN No appenders could be found for logger (kafka.utils.Log4jControllerRegistration$).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 指定-e KAFKA_LOG_DIRS也依然不可以，手动拷贝一份log4j.properties到映射的目录D:/mysoft/dev/docker-kafka-cluster/kafka01/logs下问题就解决了。
但是出现另外一个异常：
[2023-12-23 15:20:50,136] INFO Opening socket connection to server zk01.net-kafka/172.18.0.11:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:50,204] INFO Socket connection established, initiating session, client: /172.18.0.21:39814, server: zk01.net-kafka/172.18.0.11:2181 (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:50,273] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:50,749] INFO Opening socket connection to server zk03.net-kafka/172.18.0.13:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:50,811] INFO Socket connection established, initiating session, client: /172.18.0.21:49980, server: zk03.net-kafka/172.18.0.13:2181 (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:50,914] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:52,268] INFO Opening socket connection to server zk02.net-kafka/172.18.0.12:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:52,356] INFO Socket connection established, initiating session, client: /172.18.0.21:40344, server: zk02.net-kafka/172.18.0.12:2181 (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:52,446] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:52,617] INFO [ZooKeeperClient Kafka server] Closing. (kafka.zookeeper.ZooKeeperClient)
[2023-12-23 15:20:52,817] INFO Opening socket connection to server zk01.net-kafka/172.18.0.11:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:52,855] INFO Socket connection established, initiating session, client: /172.18.0.21:39828, server: zk01.net-kafka/172.18.0.11:2181 (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:53,036] INFO Session: 0x0 closed (org.apache.zookeeper.ZooKeeper)
[2023-12-23 15:20:53,037] INFO EventThread shut down for session: 0x0 (org.apache.zookeeper.ClientCnxn)
[2023-12-23 15:20:53,076] INFO [ZooKeeperClient Kafka server] Closed. (kafka.zookeeper.ZooKeeperClient)
[2023-12-23 15:20:53,222] ERROR Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
kafka.zookeeper.ZooKeeperClientTimeoutException: Timed out waiting for connection while in state: CONNECTING
at kafka.zookeeper.ZooKeeperClient.waitUntilConnected(ZooKeeperClient.scala:271)
at kafka.zookeeper.ZooKeeperClient.(ZooKeeperClient.scala:125)
at kafka.zk.KafkaZkClient$.apply(KafkaZkClient.scala:1948)
at kafka.server.KafkaServer.createZkClient$1(KafkaServer.scala:431)
at kafka.server.KafkaServer.initZkClient(KafkaServer.scala:456)
at kafka.server.KafkaServer.startup(KafkaServer.scala:191)
at kafka.Kafka$.main(Kafka.scala:109)
at kafka.Kafka.main(Kafka.scala)
[2023-12-23 15:20:53,290] INFO shutting down (kafka.server.KafkaServer)
[2023-12-23 15:20:53,375] INFO App info kafka.server for 1 unregistered (org.apache.kafka.common.utils.AppInfoParser)
[2023-12-23 15:20:53,440] INFO shut down completed (kafka.server.KafkaServer)
[2023-12-23 15:20:53,515] ERROR Exiting Kafka. (kafka.Kafka$)
[2023-12-23 15:20:53,590] INFO shutting down (kafka.server.KafkaServer) 回头看zk的控制台，发现报错java.io.IOException: ZooKeeperServer not running，跟用zkui客户端连zk集群一样的错，通过修改zk的data/myid配置，之后，3个kafka服务都能正常启动了，而且也不会反复自动重启了。
# kafka01
[2023-12-25 02:08:01,176] INFO [KafkaServer id=1] started (kafka.server.KafkaServer)
# kafka02
[2023-12-25 02:09:56,391] INFO [KafkaServer id=2] started (kafka.server.KafkaServer)
# kafka03
[2023-12-25 02:10:14,479] INFO [KafkaServer id=3] started (kafka.server.KafkaServer)虽然kafka服务在启动的初始阶段，仍然有一下异常，但是目前没有发现有什么影响：
[2023-12-25 00:52:15,882] INFO Opening socket connection to server zk01.net-kafka/172.18.0.11:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:15,932] INFO Socket connection established, initiating session, client: /172.18.0.21:49568, server: zk01.net-kafka/172.18.0.11:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:15,984] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:17,040] INFO Opening socket connection to server zk03.net-kafka/172.18.0.13:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:17,094] INFO Socket connection established, initiating session, client: /172.18.0.21:59734, server: zk03.net-kafka/172.18.0.13:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:17,148] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:17,979] INFO Opening socket connection to server zk02.net-kafka/172.18.0.12:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:18,033] INFO Socket connection established, initiating session, client: /172.18.0.21:50098, server: zk02.net-kafka/172.18.0.12:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:18,088] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:19,308] INFO Opening socket connection to server zk01.net-kafka/172.18.0.11:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:19,357] INFO Socket connection established, initiating session, client: /172.18.0.21:49580, server: zk01.net-kafka/172.18.0.11:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:19,403] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:19,974] INFO Opening socket connection to server zk03.net-kafka/172.18.0.13:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:20,027] INFO Socket connection established, initiating session, client: /172.18.0.21:59746, server: zk03.net-kafka/172.18.0.13:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:20,075] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:20,549] INFO [ZooKeeperClient Kafka server] Closing. (kafka.zookeeper.ZooKeeperClient) [2023-12-25 00:52:20,812] INFO Opening socket connection to server zk02.net-kafka/172.18.0.12:2181. Will not attempt to authenticate using SASL (unknown error) (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:20,860] INFO Socket connection established, initiating session, client: /172.18.0.21:50110, server: zk02.net-kafka/172.18.0.12:2181 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:21,016] INFO Session: 0x0 closed (org.apache.zookeeper.ZooKeeper) [2023-12-25 00:52:21,017] INFO EventThread shut down for session: 0x0 (org.apache.zookeeper.ClientCnxn) [2023-12-25 00:52:21,062] INFO [ZooKeeperClient Kafka server] Closed. (kafka.zookeeper.ZooKeeperClient) [2023-12-25 00:52:21,164] ERROR Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer) kafka.zookeeper.ZooKeeperClientTimeoutException: Timed out waiting for connection while in state: CONNECTING at kafka.zookeeper.ZooKeeperClient.waitUntilConnected(ZooKeeperClient.scala:271) at kafka.zookeeper.ZooKeeperClient.(ZooKeeperClient.scala:125) at kafka.zk.KafkaZkClient$.apply(KafkaZkClient.scala:1948) at kafka.server.KafkaServer.createZkClient$1(KafkaServer.scala:431) at kafka.server.KafkaServer.initZkClient(KafkaServer.scala:456) at kafka.server.KafkaServer.startup(KafkaServer.scala:191) at kafka.Kafka$.main(Kafka.scala:109) at kafka.Kafka.main(Kafka.scala) [2023-12-25 00:52:21,213] INFO shutting down (kafka.server.KafkaServer) [2023-12-25 00:52:21,274] INFO App info kafka.server for 1 unregistered (org.apache.kafka.common.utils.AppInfoParser) [2023-12-25 00:52:21,319] INFO shut down completed (kafka.server.KafkaServer) [2023-12-25 00:52:21,371] ERROR Exiting Kafka. (kafka.Kafka$) [2023-12-25 00:52:21,425] INFO shutting down (kafka.server.KafkaServer)
启动sheepkiller/kafka-manager
# docker run -d --name kafka-manager -p 9000:9000 --network net-kafka --ip 172.18.0.31 -e ZK_HOSTS=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 sheepkiller/kafka-manager
docker run -d --name kafka-manager -p 9000:9000 --network net-kafka -e ZK_HOSTS=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181 sheepkiller/kafka-manager
或者使用provectuslabs/kafka-ui:latest
# docker run -d --name kafka-ui -p 8080:8080 --network net-kafka --ip 172.18.0.32 -e DYNAMIC_CONFIG_ENABLED=true provectuslabs/kafka-ui
docker run -d --name kafka-ui -p 8080:8080 --network net-kafka -e DYNAMIC_CONFIG_ENABLED=true provectuslabs/kafka-ui
3、完整配置
3.1 zk完整配置
zk01/conf/zoo.cfg
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
quorumListenOnAllIPs=true
server.1=172.18.0.11:2888:3888;2181
server.2=172.18.0.12:2888:3888;2181
server.3=172.18.0.13:2888:3888;2181
4lw.commands.whitelist=*zk01/data/myid
1zk02/conf/zoo.cfg
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
quorumListenOnAllIPs=true
server.1=172.18.0.11:2888:3888;2181
server.2=172.18.0.12:2888:3888;2181
server.3=172.18.0.13:2888:3888;2181
4lw.commands.whitelist=*zk02/data/myid
2zk03/conf/zoo.cfg
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
quorumListenOnAllIPs=true
server.1=172.18.0.11:2888:3888;2181
server.2=172.18.0.12:2888:3888;2181
server.3=172.18.0.13:2888:3888;2181
4lw.commands.whitelist=*zk03/data/myid
33.2 kafka完整配置
kafka01/config/server.properties
broker.id=1
advertised.listeners=PLAINTEXT://172.18.0.21:9092
port=9092
log.dirs=/kafka/kafka-logs-7725cecb8a4f
listeners=PLAINTEXT://0.0.0.0:9092
zookeeper.connect=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181kafka02/config/server.properties
broker.id=2
advertised.listeners=PLAINTEXT://172.18.0.22:9092
port=9092
log.dirs=/kafka/kafka-logs-2b3d2a64f445
listeners=PLAINTEXT://0.0.0.0:9092
zookeeper.connect=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:2181kafka03/config/server.properties
broker.id=3
advertised.listeners=PLAINTEXT://172.18.0.23:9092
port=9092
log.dirs=/kafka/kafka-logs-d9101a867f99
listeners=PLAINTEXT://0.0.0.0:9092
zookeeper.connect=172.18.0.11:2181,172.18.0.12:2181,172.18.0.13:21814、问题
SpringBoot配置：
spring:
kafka:
bootstrap-servers: localhost:9192,localhost:9292,localhost:9392报错，与单机版错误一致
2023-12-26 15:27:29.296 INFO 11904 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka version: 2.8.1
2023-12-26 15:27:29.298 INFO 11904 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka commitId: 839b886f9b732b15
2023-12-26 15:27:29.298 INFO 11904 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka startTimeMs: 1703575649293
2023-12-26 15:27:29.302 INFO 11904 --- [ main] o.a.k.clients.consumer.KafkaConsumer : [Consumer clientId=consumer-test-consumer-group01-1, groupId=test-consumer-group01] Subscribed to topic(s): test-topic03
2023-12-26 15:27:30.191 INFO 11904 --- [ntainer#0-0-C-1] org.apache.kafka.clients.Metadata : [Consumer clientId=consumer-test-consumer-group01-1, groupId=test-consumer-group01] Cluster ID: o6TS0_kER-KgmyB7NWjjEw
2023-12-26 15:27:30.194 INFO 11904 --- [ntainer#0-0-C-1] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group01-1, groupId=test-consumer-group01] Discovered group coordinator 172.18.0.23:9092 (id: 2147483644 rack: null)
2023-12-26 15:27:30.200 INFO 11904 --- [ntainer#0-0-C-1] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group01-1, groupId=test-consumer-group01] (Re-)joining group
2023-12-26 15:27:38.804 INFO 11904 --- [ntainer#0-0-C-1] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-test-consumer-group01-1, groupId=test-consumer-group01] Group coordinator 172.18.0.23:9092 (id: 2147483644 rack: null) is unavailable or invalid due to cause: null.isDisconnected: true. Rediscovery will be attempted.