Dinesh, here is the ticket https://issues.apache.org/jira/browse/CASSANDRA-14647
On Thu, Aug 16, 2018 at 10:13 AM dinesh.jo...@yahoo.com.INVALID <dinesh.jo...@yahoo.com.invalid> wrote: > Vitali, > > It doesn't look like there is an existing Jira. It would be helpful if you > could create one with as much information as possible. Can you reduce this > issue to a short, repeatable set of steps that we can reproduce? That'll be > helpful to debug this problem. > > Dinesh > On Wednesday, August 15, 2018, 1:07:21 AM PDT, Vitali Dyachuk < > vdjat...@gmail.com> wrote: > > > I've upgraded to 3.0.17 and the issue is still there, Is there a jira > ticket for that bug or should i create one? > > On Wed, Jul 25, 2018 at 2:57 PM Vitali Dyachuk <vdjat...@gmail.com> wrote: > > I'm using 3.0.15. I see that there is some fix for sstable metadata in > 3.0.16 https://issues.apache.org/jira/browse/CASSANDRA-14217 - is that a > fix for "reading cardinalyti from statistics.db" ? > > > On Wed, Jul 25, 2018 at 1:02 PM Hannu Kröger <hkro...@gmail.com> wrote: > > What version of Cassandra are you running? There is a bug in 3.10.0 and > certain 3.0.x that occurs in certain conditions and corrupts that file. > > Hannu > > Vitali Dyachuk <vdjat...@gmail.com> kirjoitti 25.7.2018 kello 10.48: > > Hi, > I have noticed in the cassandra system.log that there is some issue with > sstable metadata, the messages says: > WARN [Thread-6] 2018-07-25 07:12:47,928 SSTableReader.java:249 - Reading > cardinality from Statistics.db failed for > /opt/data/disk5/data/keyspace/table/mc-big-Data.db > Although there is no such file. The message has appeared after i've > changed the compaction strategy from SizeTiered to Leveled. > Currently i'm running nodetool scrub to rebuilt the sstable, and it takes > a lot of time to scrub all sstables. > Reading the code it is said that if this metada is broken, then estimating > the keys will be done using index summary. How expensive it is ? > > https://github.com/apache/cassandra/blob/cassandra-3.0.15/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java#L245 > > The main question is why has this happened? > > Thanks, > Vitali Djatsuk. > >
