[jira] [Commented] (ZOOKEEPER-4530) Dynamic config file is not updated while scaling down zookeeper replicas

["SAICHARAN REDDY KOTLA (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-4530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17681973#comment-17681973 ] 

SAICHARAN REDDY KOTLA commented on ZOOKEEPER-4530:
--------------------------------------------------

This appears to be a blocking issue for us to upgrade ZK to 3.8.X. 
Zookeeper:3.7.1 is prone to CVE-2022-41881. 
Or else is there any plan to release Zookeeper:3.7.2 with security fixes. 

Thanks!

> Dynamic config file is not updated while scaling down zookeeper replicas
> ------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-4530
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4530
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.8.0
>            Reporter: Anisha K J
>            Priority: Major
>             Fix For: 3.8.0
>
>
> # create zk cluster with 3 replicas
>  # kubectl edit zookeeopercluster , change replica to 1
>  # we can see that pod count is 1
>  # Loginto {{kubectl exec -it zookeeper-0 /bin/bash}} and see the contents of {{cat /data/conf/zoo.cfg}}
> {code:java}
> cat /data/conf/zoo.cfg
> metricsProvider.exportJvmInfo=true
> dataDir=/data
> 4lw.commands.whitelist=cons, envi, conf, crst, srvr, stat, mntr, ruok
> syncLimit=2
> commitLogCount=500
> metricsProvider.httpPort=7000
> snapSizeLimitInKb=4194304
> standaloneEnabled=false
> metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
> initLimit=10
> minSessionTimeout=4000
> snapCount=10000
> admin.serverPort=8080
> autopurge.purgeInterval=1
> maxSessionTimeout=40000
> maxCnxns=0
> globalOutstandingLimit=1000
> reconfigEnabled=true
> skipACL=yes
> autopurge.snapRetainCount=3
> tickTime=2000
> quorumListenOnAllIPs=false
> preAllocSize=16384
> maxClientCnxns=60
> dynamicConfigFile=/data/conf/zoo.cfg.dynamic.200000013 {code}
> 5.  cat /data/conf/zoo.cfg.dynamic.200000013  
>  # 
> {code:java}
> apache-zookeeper-3.8.0-bin# cat /data/conf/zoo.cfg.dynamic.200000013
> server.1=zookeeper-0.zookeeper-headless.default.svc.cluster.local:2888:3888:participant;0.0.0.0:2181
> server.2=zookeeper-1.zookeeper-headless.default.svc.cluster.local:2888:3888:participant;0.0.0.0:2181
> server.3=zookeeper-2.zookeeper-headless.default.svc.cluster.local:2888:3888:participant;0.0.0.0:2181r {code}
> Issue: No new dynamic config file is created, and config file shows  3 entries even if there is only one. Same issue is not seen with zookeeper 3.7.0 and 3.6.3



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