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https://issues.apache.org/jira/browse/SOLR-5495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991498#comment-13991498
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Timothy Potter commented on SOLR-5495:
--------------------------------------
Thanks for the review Mark! I think there are still some weird interactions
going on with this code and the waitForLeaderToSeeDownState stuff as I'm seeing
some exceptions like the following in a good sized cluster when I knock over
replicas during heavy indexing. Leader doesn't see down state, it sees the
"recovering" state.
2014-05-07 02:34:03,112 [Thread-3531] ERROR solr.cloud.ZkController - There
was a problem making a request to the
leader:org.apache.solr.client.solrj.SolrServerException: Timeout occured while
waiting response from server at: http://host:8985/solr
at
org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:562)
at
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
at
org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
at
org.apache.solr.cloud.ZkController.waitForLeaderToSeeDownState(ZkController.java:1528)
at
org.apache.solr.cloud.ZkController.registerAllCoresAsDown(ZkController.java:372)
at org.apache.solr.cloud.ZkController.access$000(ZkController.java:87)
at org.apache.solr.cloud.ZkController$1.command(ZkController.java:229)
at
org.apache.solr.common.cloud.ConnectionManager$1$1.run(ConnectionManager.java:166)
In short, I there are still a few little issues that didn't show up in unit
testing. So I'm going to flog this area of the code a bit more tomorrow morning!
> Recovery strategy for leader partitioned from replica case.
> -----------------------------------------------------------
>
> Key: SOLR-5495
> URL: https://issues.apache.org/jira/browse/SOLR-5495
> Project: Solr
> Issue Type: Bug
> Reporter: Mark Miller
> Assignee: Timothy Potter
> Attachments: SOLR-5495.patch, SOLR-5495.patch, SOLR-5495.patch
>
>
> We need to work out a strategy for the case of:
> Leader and replicas can still talk to ZooKeeper, Leader cannot talk to
> replica.
> We punted on this in initial design, but I'd like to get something in.
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