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From Sathyam <>
Subject Issue related to SOLR Indexing
Date Mon, 06 Mar 2017 11:05:52 GMT

I am indexing data into a 64 shard collection created in a SOLR 4.10.3,CDH
cluster running over HDFS and having 19 nodes.
The indexing runs very well for the intial few hours(5-6) post which all
the different nodes of the cluster start showing health issues(varying
randomly across the nodes) and the indexing speed also reduces a lot.
I have used the SOLR tuning guidelines specified in -

and tried but it did not work out. I observed that decreasing the
"solr.hdfs.blockcache.slab.count" to a very low value(32) improves indexing
a lot but only for the initial few hours.

Some errors that I get on the server side logs are -
org.apache.curator.CuratorConnectionLossException: KeeperErrorCode =
org.apache.solr.core.SolrCore: org.apache.solr.common.SolrException: Cannot
talk to ZooKeeper - Updates are disabled.
org.apache.solr.update.processor.DistributedUpdateProcessor: ClusterState
says we are the leader, but locally we don't think so

The cluster never self-recovers post encountering the errors I mentioned
Restarting the cluster does solve the problem though which again starts
occurring after a few hours.

I would need some suggestions/guidelines/helpful links on what are the
parameters that I should consider and their recommended values to be used
to ensure a stable and smooth indexing.

Sathyam Doraswamy

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