Hello @ganeshkumarj    Thanks for using Cloudera Community. Based on the Post, You are migrating from Cloudera Search (CDH 5.9.3) to Standalone Solr (Apache v4.10.3). As your Team mentioned, the Error points to Index (Copied manually) being on a Lucene Version higher than anticipated [1].    Your Team can confirm the LuceneVersion via "solrconfig.xml" for the Collection "sample_collection" on CDH. If LuceneVersion Match isn't feasible, ReIndexing is the Only Way forward. Yet, there are few things wherein our help in this Post would be limited: (I) CDH v5.9.3 is EoS since a long time. Internally, We have extremely limited Setup for checking further on your Team's concerns.  (II) Your Team is implementing the Migration on Standalone Solr (Apache v4.10.3). Cloudera Product Offering package Solr into Search (In CDH) & Solr (In CDP). Unfortunately, We have limited input on any Open Source Implementation outside of Cloudera Product.    Our Team would be happy to assist your Team to Migrate from CDH v5.9.3 to CDP, if required by your Team. We have Documentation (Which are Tested internally) to migrate from CDH Search to CDP Solr & your Team would get the Support assistance in any issues as well.    Regards, Smarak   [1] https://lucene.apache.org/core/7_1_0/core/org/apache/lucene/index/IndexFormatTooNewException.html   ... View more

The command is only for non-Cloudera-Manager deployments like the documentation notes: """ In non-managed deployments, you can start a Lily HBase Indexer Daemon manually on the local host with the following command: sudo service hbase-solr-indexer restart """ If you use Cloudera Manager then just add a new Service from the Clusters page of the type "Key-Value Store Indexer" shown in the new service list. Then proceed with configuring it from CM and starting it. ... View more

Hello pdvorak                 Thanks for your reply. We have solved this issue by uploading the collections config files back to the zookeeper using update and reload option in solrcloud. After execting those commands we done solr restart. while restarting the solr elects the collection leaders and placed those informations under /solr/collection in zookeeper.                Just for my understand could you please answer for the below queries. what do you mean by  "zk data dir" . Is it creates the snapshot for the config files in zookeeper.  As I know zookeeper holds only the config files instead of data. then what "zk data dir" holds?   ... View more