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https://issues.apache.org/jira/browse/ZOOKEEPER-2949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266548#comment-16266548
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Feng Shaobao commented on ZOOKEEPER-2949:
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I think it is part of SSL protocol to specify the severname here. anyone can
help merging this PR?
> SSL ServerName not set when using hostname, some proxies may failed to proxy
> the request.
> -----------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2949
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2949
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.5.3
> Environment: In our environment, the zk clusters are all behind a
> proxy, the proxy decide to transfer the request from client based on the
> "ServerName" field in SSL Hello packet(the proxy served on SSL only). but the
> Hello packets that zk client sended do proxy do not contain the "ServerName"
> field in it. after inspect the codes, we have found that it is because that
> zk client did not specify the peerHost when initializing the SSLContext.
> Reporter: Feng Shaobao
> Fix For: 3.6.0
>
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> In our environment, the zk clusters are all behind a proxy, the proxy decide
> to transfer the request from client based on the "ServerName" field in SSL
> Hello packet(the proxy served on SSL only). but the Hello packets that zk
> client sended do proxy do not contain the "ServerName" field in it. after
> inspect the codes, we have found that it is because that zk client did not
> specify the peerHost when initializing the SSLContext.
> In the method initSSL of class ZKClientPipelineFactory, it initialize the
> SSLEngine like below:
> sslEngine = sslContext.createSSLEngine();
> Actually the sslContext provide another factory method that receives the
> hostName and port parameter.
> public final SSLEngine createSSLEngine(String hostName, int port)
> If we call this method to create the SSLEngine, then the proxy will know
> which zk cluster it really want to access.
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