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https://issues.apache.org/jira/browse/ZOOKEEPER-3940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212098#comment-17212098
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maoling commented on ZOOKEEPER-3940:
------------------------------------
Another idea: Could you please also try to reproduce this issue in your local
laptop？This will help us to locate the problem rapidly to find out "Is this
issue from your environment setting or zk(a really bug?) ?"
> Zookeeper restart of leader causes all zk nodes to not serve requests
> ---------------------------------------------------------------------
>
> Key: ZOOKEEPER-3940
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3940
> Project: ZooKeeper
> Issue Type: Bug
> Components: quorum, server
> Affects Versions: 3.6.2
> Environment: dataDir=/data
> dataLogDir=/datalog
> tickTime=2000
> initLimit=10
> syncLimit=5
> maxClientCnxns=60
> autopurge.snapRetainCount=10
> autopurge.purgeInterval=24
> leaderServes=yes
> standaloneEnabled=false
> admin.enableServer=false
> snapshot.trust.empty=true
> audit.enable=true
> 4lw.commands.whitelist=*
> sslQuorum=true
> quorumListenOnAllIPs=true
> portUnification=false
> serverCnxnFactory=org.apache.zookeeper.server.NettyServerCnxnFactory
> ssl.quorum.keyStore.location=/apache-zookeeper-3.6.2-bin/java/keystore_zoo1.jks
> ssl.quorum.keyStore.password=********
> ssl.quorum.trustStore.location=/apache-zookeeper-3.6.2-bin/java/truststore.jks
> ssl.quorum.trustStore.password=********
> ssl.quorum.protocol=TLSv1.2
> ssl.quorum.enabledProtocols=TLSv1.2
> ssl.client.enable=true
> secureClientPort=2281
> client.portUnification=true
> clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty
> ssl.keyStore.location=/apache-zookeeper-3.6.2-bin/java/keystore_zoo1.jks
> ssl.keyStore.password=********
> ssl.trustStore.location=/apache-zookeeper-3.6.2-bin/java/truststore.jks
> ssl.trustStore.password=********
> ssl.protocol=TLSv1.2
> ssl.enabledProtocols=TLSv1.2
> reconfigEnabled=false
> server.1=zoo1:2888:3888:participant;2181
> server.2=zoo2:2888:3888:participant;2181
> server.3=zoo3:2888:3888:participant;2181
> Reporter: Stan Henderson
> Priority: Critical
> Attachments: nossl-zoo.cfg, zk-docker-containers-nossl.log.zip,
> zk-docker-containers.log.zip, zoo.cfg, zoo1-docker-containers.log,
> zoo1-docker-containers.log, zoo2-docker-containers.log,
> zoo3-docker-containers.log
>
>
> We have configured a 3 node zookeeper cluster using the 3.6.2 version in a
> Docker version 1.12.1 containerized environment. This corresponds to Sep 16
> 20:03:01 in the attached docker-containers.log files.
> NOTE: We use the Dockerfile from https://hub.docker.com/_/zookeeper for 3.6
> branch
> As a part of our testing, we have restarted each of the zookeeper nodes and
> have seen the following behaviour:
> zoo1, zoo2, and zoo3 healthy (zoo1 is leader)
> We started our testing at approximately Sep 17 13:01:05 in the attached
> docker-containers.log files.
> 1. (simulate patching zoo2)
> - restart zoo2
> - zk_synced_followers 1
> - zoo1 leader
> - zoo2 unhealthy (This ZooKeeper instance is not currently serving requests)
> - zoo3 healthy
> - waited 5 minutes with no change
> - restart zoo3
> - zoo1 leader
> - zk_synced_followers 1
> - zoo2 unhealthy (This ZooKeeper instance is not currently serving requests)
> - zoo3 healthy
> - restart zoo2
> - no changes
> - restart zoo3
> - zoo1 leader
> - zk_synced_followers 2
> - zoo2 healthy
> - zoo3 unhealthy (This ZooKeeper instance is not currently serving requests)
> - waited 5 minutes and zoo3 returned to healthy
> 2. simulate patching zoo3
> - zoo1 leader
> - restart zoo3
> - zk_synced_followers 2
> - zoo1, zoo2, and zoo3 healthy
> 3. simulate patching zoo1
> - zoo1 leader
> - restart zoo1
> - zoo1, zoo2, and zoo3 unhealthy (This ZooKeeper instance is not currently
> serving requests)
> - waited 5 minutes to see if they resolve Sep 17 14:39 - Sep 17 14:44
> - tried restarting in this order: zoo2, zoo3, zoo1 and no change; all still
> unhealthy (this step was not collected in the log files).
> The third case in the above scenarios is the critical one since we are no
> longer able to start any of the zk nodes.
>
> [~maoling] this issue may relate to
> https://issues.apache.org/jira/browse/ZOOKEEPER-3920 which corresponds to the
> first and second cases above that I am working with [~blb93] on.
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