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https://issues.apache.org/jira/browse/SOLR-7642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16657458#comment-16657458
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Isabelle Giguere commented on SOLR-7642:
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My 2 cents is that creating the chroot only if it is /solr doesn't solve the
original issue. To impose /solr is not equivalent to allowing the creation of
the chroot. It's just less messy than having everything at the root '/'.
How about a specific property in solr.in.sh / solr.in.cmd ? Instead of
including the chroot in ZK_HOST, it could bet set separately, so it would have
to be a conscious decision.
And about typos...
Using zkCLI, the user creates the chroot (possibly making a typo in command
line) then, has to write the same (typo) chroot in ZK_HOST in solr.in.sh to
avoid 2 ZK paths created.
I would rather just use zkCLI to clean-up what was added by mistake, than to
have to systematically use it once to create the chroot, then repeat the same
chroot in solr.in.sh
I think if the chroot is specified only once, that's less likely to create
confusion.
> Should launching Solr in cloud mode using a ZooKeeper chroot create the
> chroot znode if it doesn't exist?
> ---------------------------------------------------------------------------------------------------------
>
> Key: SOLR-7642
> URL: https://issues.apache.org/jira/browse/SOLR-7642
> Project: Solr
> Issue Type: Improvement
> Reporter: Timothy Potter
> Priority: Minor
> Attachments: SOLR-7642.patch, SOLR-7642.patch,
> SOLR-7642_tag_7.5.0.patch
>
>
> If you launch Solr for the first time in cloud mode using a ZooKeeper
> connection string that includes a chroot leads to the following
> initialization error:
> {code}
> ERROR - 2015-06-05 17:15:50.410; [ ] org.apache.solr.common.SolrException;
> null:org.apache.solr.common.cloud.ZooKeeperException: A chroot was specified
> in ZkHost but the znode doesn't exist. localhost:2181/lan
> at
> org.apache.solr.core.ZkContainer.initZooKeeper(ZkContainer.java:113)
> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:339)
> at
> org.apache.solr.servlet.SolrDispatchFilter.createCoreContainer(SolrDispatchFilter.java:140)
> at
> org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:110)
> at
> org.eclipse.jetty.servlet.FilterHolder.initialize(FilterHolder.java:138)
> at
> org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:852)
> at
> org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298)
> at
> org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349)
> at
> org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)
> at
> org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505)
> {code}
> The work-around for this is to use the scripts/cloud-scripts/zkcli.sh script
> to create the chroot znode (bootstrap action does this).
> I'm wondering if we shouldn't just create the znode if it doesn't exist? Or
> is that some violation of using a chroot?
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