Re: Dropped mutation messages

2015-06-13 Thread Anuj Wadehra
U said RF=1...missed that..so not sure eventual consistency is creating issues.. Thanks Anuj Wadehra Sent from Yahoo Mail on Android From:"Anuj Wadehra" Date:Sat, 13 Jun, 2015 at 11:31 pm Subject:Re: Dropped mutation messages I think the messages dropped are the asynchronous ones required t

Re: Dropped mutation messages

2015-06-13 Thread Anuj Wadehra
I think the messages dropped are the asynchronous ones required to maintain eventual consistency. Client may not be complaining as the data gets commited to one node synchronously..but dropped when sent to other nodes asynchronously.. We resolved similar issue in our cluster by increasing memta

Re: Dropped mutation messages

2015-06-13 Thread Robert Wille
Internode messages which are received by a node, but do not get not to be processed within rpc_timeout are dropped rather than processed. As the coordinator node will no longer be waiting for a response. If the Coordinator node does not receive Consistency Level responses before the rpc_timeout

Re: Dropped mutation messages

2015-06-12 Thread Robert Wille
I meant to say I’m *not* overloading my cluster. On Jun 12, 2015, at 6:52 PM, Robert Wille wrote: > I am preparing to migrate a large amount of data to Cassandra. In order to > test my migration code, I’ve been doing some dry runs to a test cluster. My > test cluster is 2.0.15, 3 nodes, RF=1 a

Re: Dropped mutation messages

2013-06-20 Thread aaron morton
> What should be the path to investigate this? Dropped messages are a symptom of other problems. Look for the GCInspector logging lots of ParNew, or the IO system being overloaded, or large (1000's) read or write batches from the client. Cheers - Aaron Morton Freelance Cassandr

Re: Dropped mutation messages

2013-06-19 Thread Shahab Yunus
Hello Arthur, What do you mean by "The queries need to be lightened"? Thanks, Shahb On Tue, Jun 18, 2013 at 8:47 PM, Arthur Zubarev wrote: > Cem hi, > > as per http://wiki.apache.org/cassandra/FAQ#dropped_messages > > > Internode messages which are received by a node, but do not get not to b

Re: Dropped mutation messages

2013-06-18 Thread Arthur Zubarev
Cem hi, as per http://wiki.apache.org/cassandra/FAQ#dropped_messages Internode messages which are received by a node, but do not get not to be processed within rpc_timeout are dropped rather than processed. As the coordinator node will no longer be waiting for a response. If the Coordinator no