I noticed this when upgrading a cluster from 1.0.1 to 1.0.5. We moved one node up to 1.0.5 to test everything was ok and a repair ran from that node. It streamed files with the new minor file version number to nodes that were 1.0.1
On restarting one of the nodes while still at 1.0.1 we got this… INFO [SSTableBatchOpen:1] 2011-12-07 21:56:19,885 SSTableReader.java (line 133) Opening /home/cassandra/data/spi/hits_sort-h-15 (112704 bytes) ERROR [main] 2011-12-07 21:56:19,900 AbstractCassandraDaemon.java (line 354) Exception encountered during startup java.lang.RuntimeException: Can't open sstables from the future! Current version h, found file: /home/cassandra/data/spi/email_mailers-hb-101 at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:325) at org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:303) at org.apache.cassandra.db.Table.initCf(Table.java:372) at org.apache.cassandra.db.Table.<init>(Table.java:320) at org.apache.cassandra.db.Table.open(Table.java:121) at org.apache.cassandra.db.Table.open(Table.java:104) at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:183) at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:337) at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:107) I think because the 1.0.1 node did not have this see https://issues.apache.org/jira/browse/CASSANDRA-3478 Perhaps something should be added to NEWS.txt to say all nodes should be on 1.0.3 before running a repair? Cheers Aaron p.s. Hello everyone :) ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com