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From Tzach Livyatan <tz...@cloudius-systems.com>
Subject cassandra-stress: Not enough replica available for query at consistency LOCAL_ONE (1 required but only 0 alive)
Date Tue, 28 Jul 2015 14:56:49 GMT
I'm running benchmark on a 2 nodes C* 2.1.8 cluster using cassandra-stress,
with the default of CL =1
Stress runs fine for some time, and than start throwing:

java.io.IOException: Operation x10 on key(s) [36333635504d4b343130]: Error
executing: (UnavailableException): Not enough replica available for query
at consistency LOCAL_ONE (1 required
 but only 0 alive)

at org.apache.cassandra.stress.Operation.error(Operation.java:216)
at org.apache.cassandra.stress.Operation.timeWithRetry(Operation.java:188)
at
org.apache.cassandra.stress.operations.predefined.CqlOperation.run(CqlOperation.java:99)
at
org.apache.cassandra.stress.operations.predefined.CqlOperation.run(CqlOperation.java:107)
at
org.apache.cassandra.stress.operations.predefined.CqlOperation.run(CqlOperation.java:259)
at
org.apache.cassandra.stress.StressAction$Consumer.run(StressAction.java:309)

The problem disappears when I decrease the number of client threads, but my
goal is to test max performance, so lowering the bar defeat my purpose.

Is this normal server push back under too much pressure?
shouldn't the stress client slow down before this happened?

Thanks
Tzach

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