Hi All,
i have a KeySpace in Cassandra (cassandra version 3.0.9- total 12 Servers
)With below definition:
{'DC1': '2', 'class':
'org.apache.cassandra.locator.NetworkTopologyStrategy'}
Some time i am getting below exception
com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra
timeout during write query at consistency QUORUM (3 replica were required
but only 2 acknowledged the write)
at
com.datastax.driver.core.exceptions.WriteTimeoutException.copy(WriteTimeoutException.java:73)
at
com.datastax.driver.core.exceptions.WriteTimeoutException.copy(WriteTimeoutException.java:26)
at
com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:37)
at
com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:245)
at
com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:68)
at
com.toi.stream.data.AdImprLogDaoImpl.updateImpr(AdImprLogDaoImpl.java:158)
at
com.toi.stream.service.AdClickLogAndAdimprLogServiceImpl.updateGoalsOnImpr(AdClickLogAndAdimprLogServiceImpl.java:522)
at
com.toi.stream.service.ConversionBillingLastAttributionServiceV2Impl.attribute(ConversionBillingLastAttributionServiceV2Impl.java:456)
at
com.toi.stream.service.ConversionBillingLastAttributionServiceV2Impl.attributeAdTracker(ConversionBillingLastAttributionServiceV2Impl.java:228)
at
com.toi.stream.process.AdTrackerStreamProcessorV2.process(AdTrackerStreamProcessorV2.java:86)
at
com.toi.stream.kafka.KafkaGroupConsumer.run(KafkaGroupConsumer.java:175)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.datastax.driver.core.exceptions.WriteTimeoutException:
Cassandra timeout during write query at consistency QUORUM (3 replica were
required but only 2 acknowledged the write)
at
com.datastax.driver.core.exceptions.WriteTimeoutException.copy(WriteTimeoutException.java:100)
at
com.datastax.driver.core.Responses$Error.asException(Responses.java:134)
at
com.datastax.driver.core.RequestHandler$SpeculativeExecution.onSet(RequestHandler.java:525)
at
com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:1077)
why its waiting for acknowledged from 3rd server as replication factor is 2?
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