Sylvain, thanks for the quick response, and you are correct: there is an empty index file. I removed the file and tried to start it up. Now Cassandra is reporting corrupt sstables. Does this mean I can't just simply back up var/lib directory (use snapshots instead) ? We don't have much data right now so I thought it'd be easier to back up the entire directory.
Thanks On Thu, May 5, 2011 at 2:56 PM, Sylvain Lebresne <sylv...@datastax.com>wrote: > On Thu, May 5, 2011 at 8:38 PM, Wenjun Che <wen...@openf.in> wrote: > > Hello, > > > > I have a one node cluster (refresh install from 0.7.4 and upgraded to > 0.7.5 > > last week). The data is being backed up by a cron job that periodically > > tar/gzip entire > > var/lib directory. when I tested the backup by restoring the last tar > file, > > I am seeing the following exception: > > > > DEBUG 13:45:37,830 Load statistics for > > \var\lib\cassandra\data\Appoji\ApplicationUserPermission-f-6 > > ERROR 13:45:37,832 Exception encountered during startup. > > java.lang.AssertionError > > at > > > org.apache.cassandra.io.sstable.SSTable.estimateRowsFromIndex(SSTable.java:233) > > at > > > org.apache.cassandra.io.sstable.SSTableReader.load(SSTableReader.java:286) > > at > > > org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:191) > > at > > > org.apache.cassandra.db.ColumnFamilyStore.<init>(ColumnFamilyStore.java:232) > > at > > > org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java: > > 480) > > at > > > org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java: > > 461) > > at org.apache.cassandra.db.Table.initCf(Table.java:308) > > at org.apache.cassandra.db.Table.<init>(Table.java:245) > > at org.apache.cassandra.db.Table.open(Table.java:106) > > at > > > org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:1 > > 61) > > at > > > org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.jav > > a:315) > > at > > org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:79) > > Exception encountered during startup. > > > > I checked few other earlier backup tar files and they seem to be fine. > Can > > this be caused by the way I am backing it up? > > I think that could be triggered if you have a 0 bytes index file for > instance, so if you had one such > index file in the backup, that could be a problem. > > -- > Sylvain >
