Since queries are asynchronously executed, you will need some mechanism in your code to queue your request. Try setting your setMaxQueueSize to meet your need. By default its 256
http://docs.datastax.com/en/latest-java-driver-api/com/datastax/driver/core/PoolingOptions.html#setMaxQueueSize-int- If setMaxQueueSize does not do the trick for you then you might need to look at throttling your queries. Regards, Akhil > On 24/08/2017, at 6:40 AM, Avi Levi <a...@indeni.com> wrote: > > Hi , > I need to execute large amount (millions) of select queries. but I am getting > BusyPoolExcption how can I avoid that ? I tried to configure the pooling > options but couldn't see that it had any impact > Any advice ? > Failed to execute query SELECT * FROM my_table WHERE id = 'some_uuid' AND x > >= 1503501104 AND y < 1503501224; > com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) > tried for query failed (tried: localhost/0:0:0:0:0:0:0:1:9042 > (com.datastax.driver.core.exceptions.BusyPoolException: > [localhost/0:0:0:0:0:0:0:1] Pool is busy (no available connection and the > queue has reached its max size 256)))
