http://wiki.apache.org/cassandra/FAQ#dropped_messages
As to what's causing them - look in the logs and it will do the equivalent of a nodetool tpstats right after the dropped messages messages. That should give you a clue as to why there are dropped messages - which thread pools are backed up on that node. On Aug 16, 2011, at 7:21 AM, David Boxenhorn wrote: > How can I tell what's causing dropped messages? > > Is it just too much activity? I'm not getting any other, more specific > messages, just these: > > WARN [ScheduledTasks:1] 2011-08-15 11:33:26,136 MessagingService.java (line > 504) Dropped 1534 MUTATION messages in the last 5000ms > WARN [ScheduledTasks:1] 2011-08-15 11:33:26,137 MessagingService.java (line > 504) Dropped 58 READ_REPAIR messages in the last 5000ms >
