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shobhitrathore avatar image
shobhitrathore asked ·

com.datastax.driver.core.exceptions.OverloadedException

Caused by: com.datastax.driver.core.exceptions.OverloadedException: Queried host (/10.xx.xx.xx:9042) was overloaded: Request dropped due to backpressure overload: timeout exceeded.
at com.datastax.driver.core.Responses$Error.asException(Responses.java:161)
at com.datastax.driver.core.RequestHandler$SpeculativeExecution.onSet(RequestHandler.java:646)
at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:1240)
at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:1158)

cassandra
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1 Answer

bettina.swynnerton avatar image
bettina.swynnerton answered ·

Hi @shobhitrathore,

there isn't a lot of detail in your question, but as the driver exception states, the queried host is overloaded and did not respond in time.

You might want to check what is happening with this particular host, e.g. check the system.log for the time when you received the exception.

I hope this helps you to look further into this issue.

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Hi @bettina.swynnerton,

Thanks for the reply !

actually the issue, when one of our spark jobs runs, which runs millions of read/writes the coordinator node to which its connect gets overloaded.

Any specific parameters to tune ? Or any specific thing to check in system.log ?

Can we tun backpressure setting , as it is getting overloaded as well !


Regards,

Shobhit


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