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https://issues.apache.org/jira/browse/HADOOP-16763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16997904#comment-16997904
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Masatake Iwasaki commented on HADOOP-16763:
-------------------------------------------
[~elgoiri] I tried today's trunk against zookeeper-3.4.14 quorum (on 3-node
docker cluster on my laptop). Both zookeeper-3.5.6.jar (bundled with hadoop
tarball) and zookeeper-3.4.14.jar as a client library worked for me.
{noformat}
$ docker exec hadoop01 /hadoop/bin/hadoop classpath --glob | sed -z -e
's/:/\n/g' | grep zookeeper
/hadoop/share/hadoop/common/lib/zookeeper-3.5.6.jar
/hadoop/share/hadoop/common/lib/zookeeper-jute-3.5.6.jar
/hadoop/share/hadoop/hdfs/lib/zookeeper-3.5.6.jar
/hadoop/share/hadoop/hdfs/lib/zookeeper-jute-3.5.6.jar
$ docker exec hadoop01 /hadoop/bin/yarn rmadmin -getServiceState rm1
active
{noformat}
{noformat}
$ docker exec hadoop01 /hadoop/bin/hadoop classpath --glob | sed -z -e
's/:/\n/g' | grep zookeeper
/zookeeper/zookeeper-3.4.14.jar
$ docker exec hadoop01 /hadoop/bin/yarn rmadmin -getServiceState rm1
active
{noformat}
> Make Curator 4 run in soft-compatibility mode with ZooKeeper 3.4
> ----------------------------------------------------------------
>
> Key: HADOOP-16763
> URL: https://issues.apache.org/jira/browse/HADOOP-16763
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Íñigo Goiri
> Priority: Major
>
> HADOOP-16579 changed Curator to 4.2 and ZooKeeper to 3.5.
> This change relate to the client libraries used by the components.
> However, the ensemble in most deployments is 3.4 (default in Ubuntu for
> example).
> To allow this mode, there is a soft-compatibility mode described in
> http://curator.apache.org/zk-compatibility.html
> We should enable this soft-compatibility mode.
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