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amitosh avatar image
amitosh asked Erick Ramirez answered

downgrade from dse 6.1 to 5.1.16

hi team i am downgrading from dse 6.1 to 5.1.16

is there any particulars i need to take care off ?? while downgrade ?

After running the installation for 5.1.16 I am getting lots of errors from dse.yaml


Also after using new yaml file getting error like

CassandraDaemon.java:731 - Detected unreadable sstables /var/lib/cassandra/data ......

downgrading dse
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Erick Ramirez avatar image
Erick Ramirez answered

@amitosh you cannot just downgrade the binaries after you have already upgraded a node. You need to resolve the problem on the node then upgrade the rest of the nodes in the cluster. If you really can't resolve the issue, you will need to uninstall DSE then clear all directories and restore from a previous backup. For details, see Rolling back an upgrade. Cheers!

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