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https://issues.apache.org/jira/browse/CASSANDRA-14246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16372410#comment-16372410
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Jeff Jirsa commented on CASSANDRA-14246:
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This doesn't appear to be a Cassandra bug, but rather, you missed running
upgradesstables when you went from 1.2 to 2.0. You need to use the offline
sstableupgrade tool from 2.0, which will convert the files with {{-ic}} into
{{-jb}}, which can be read by 2.1.
> Cassandra fails to start after upgrade
> --------------------------------------
>
> Key: CASSANDRA-14246
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14246
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Rajnesh Siwal
> Priority: Critical
>
> We are unable to start cassandra after it has been upgraded.
> We have a cluster of three nodes. After upgrading the first node, we found
> that the service failed to start on it because of incompatible SSTables:
> The older version: 2.0.17
> New Version: 2.1.20
> The cassandra fails to start as it found incompatible SSTable :
> INFO 08:38:18 Opening
> /var/lib/cassandra/data/cp_orgstmt_keyspace/cp_event_processing/cp_orgstmt_keyspace-cp_event_processing-jb-2
> (975 bytes)
> java.lang.RuntimeException: Incompatible SSTable found. Current version ka is
> unable to read file:
> /var/lib/cassandra/data/cp_emb_us_keyspace/cp_event_processing/cp_emb_us_keyspace-cp_event_processing-ic-3.
> Please run upgradesstables.
> java.lang.RuntimeException: Incompatible SSTable found. Current version ka is
> unable to read file:
> /var/lib/cassandra/data/cp_emb_us_keyspace/cp_event_processing/cp_emb_us_keyspace-cp_event_processing-ic-3.
> Please run upgradesstables.
> Exception encountered during startup: Incompatible SSTable found. Current
> version ka is unable to read file:
> /var/lib/cassandra/data/cp_emb_us_keyspace/cp_event_processing/cp_emb_us_keyspace-cp_event_processing-ic-3.
> Please run upgradesstables.
>
> Till the time cassandra server is not running, we cannot run "nodetool
> upgradesstables".
> Please suggest
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