How about this message: WARN [DroppedMessagesLogger] 2010-08-20 08:02:27,668 MessagingService.java (lin e 512) Dropped 46469 messages in the last 1000ms
For this application, I also have a 3-node cluster but I'm running a version of Cassandra built off the trunk (we wanted the 'time to live' feature before 0.7.beta was out). My application runs a daily loading script which peaks at under 3000 batch_mutate requests per second, well below the 46K in this log. Are these some sort of internal messages, like pings? Or are updates being dropped on the floor? Thanks, Ron On Wed, Aug 18, 2010 at 9:13 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > This is Cassandra trying to protect itself from the load spike. You > probably need to balance your nodes, tune for performance, add > capacity, or some combination. > > On Wed, Aug 18, 2010 at 6:16 AM, Jianing Hu <jian...@gmail.com> wrote: > > We have a 3-node cluster of Cassandra 0.6.4, on one of them there's a > > ton of error message like the following one: > > WARN [MESSAGE-DESERIALIZER-POOL:1] 2010-08-18 04:10:57,767 > > MessageDeserializationTask.java (line 47) dropping message (1ms past > > timeout) > > > > The nod's load spikes and is super slow to read from. Any ideas? > > > > Thanks. > > > > - Jianing > > > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com >
