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https://issues.apache.org/jira/browse/SOLR-5261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776152#comment-13776152
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Markus Jelsma commented on SOLR-5261:
-------------------------------------
Yonik, i think there's a similar issue. Yesterday, just before you opened this
issue we saw something similar. A slighly older trunk SolrJ could not talk to a
trunk cluster older than september the 18th. We got a similar exception:
{code}
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Map
at
org.apache.solr.common.cloud.ClusterState.collectionFromObjects(ClusterState.java:263)
at org.apache.solr.common.cloud.ClusterState.load(ClusterState.java:231)
at org.apache.solr.common.cloud.ClusterState.load(ClusterState.java:207)
at
org.apache.solr.common.cloud.ZkStateReader.createClusterStateWatchersAndUpdate(ZkStateReader.java:299)
at
org.apache.solr.client.solrj.impl.CloudSolrServer.connect(CloudSolrServer.java:238)
at
org.apache.nutch.indexer.solr.SolrUtils.getCloudServer(SolrUtils.java:108)
at
org.apache.nutch.indexer.solr.SolrUtils.getSolrServers(SolrUtils.java:65)
at org.apache.nutch.indexer.solr.SolrWriter.open(SolrWriter.java:66)
{code}
We still see this exception with both client and server updated to today's
trunk.
> can't update current trunk or 4x with 4.4 or earlier binary protocol
> --------------------------------------------------------------------
>
> Key: SOLR-5261
> URL: https://issues.apache.org/jira/browse/SOLR-5261
> Project: Solr
> Issue Type: Bug
> Reporter: Yonik Seeley
> Assignee: Yonik Seeley
> Priority: Blocker
> Fix For: 4.5, 5.0
>
> Attachments: SOLR-5261.patch
>
>
> Seems back compat in the binary protocol was broke broke sometime after 4.4
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