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https://issues.apache.org/jira/browse/ZOOKEEPER-3779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17725669#comment-17725669
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zhangzhisheng commented on ZOOKEEPER-3779:
------------------------------------------
{code:java}
// code placeholder
java.lang.IllegalArgumentException: Unable to canonicalize address
10.0.0.1/<unresolved>:2181 because it's not resolvable {code}
downgrade to JDK8
> Zookeeper client 3.4.x fails to connect when using Java 14
> ----------------------------------------------------------
>
> Key: ZOOKEEPER-3779
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3779
> Project: ZooKeeper
> Issue Type: Bug
> Affects Versions: 3.4.14
> Environment: Java 14
> Reporter: Jaikiran Pai
> Priority: Major
>
> When running on Java 14, the 3.4.x version of
> `org.apache.zookeeper.Zookeeper` which creates a client to connect to a
> Zookeeper server, fails to connect against the server.
> This appears to be due to the use of `InetSocketAddress.toString()` to parse
> the host name of an unresolved address in StaticHostProvider[1]. The issue
> doesn't show up in 3.5.x versions of Zookeeper. But given that 3.4.x isn't
> that old, I thought I'll raise this here and see if it can be fixed and
> whether a new 3.4.x release is warranted.
> Furthermore, there was a discussion here[2] which explains the whole details.
> There's even a discussion in the openjdk net-dev mailing list[3] to see if
> there are other similar usages in Zookeeper which might be impacted by this
> change in the JDK 14. I don't have any real experience with this library, so
> if someone more knowledgable knows whether or not there are other similar
> usages in this project, please do reply to the net-dev discussion on the
> openjdk mailing list.
>
> [1]
> [https://github.com/apache/zookeeper/blob/branch-3.4.14/zookeeper-server/src/main/java/org/apache/zookeeper/client/StaticHostProvider.java#L135]
> [2] [https://github.com/quarkusio/quarkus/issues/8212#issuecomment-605403656]
> [3] https://mail.openjdk.java.net/pipermail/net-dev/2020-March/013725.html
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