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From Sylvain Lebresne <sylv...@datastax.com>
Subject Re: Occasional NPE using DataStax Java driver
Date Thu, 19 Dec 2013 08:42:28 GMT
Mind opening a ticket on https://datastax-oss.atlassian.net/browse/JAVA?
It's almost surely a bug.

--
Sylvain


On Thu, Dec 19, 2013 at 8:21 AM, David Tinker <david.tinker@gmail.com>wrote:

> We are using Cassandra 2.0.3-1 installed on Ubuntu 12.04 from the
> DataStax repo with the DataStax Java driver version 2.0.0-rc1. Every
> now and then we get the following exception:
>
> 2013-12-19 06:56:34,619 [sql-2-t15] ERROR core.RequestHandler  -
> Unexpected error while querying /x.x.x.x
> java.lang.NullPointerException
> at
> com.datastax.driver.core.HostConnectionPool.waitForConnection(HostConnectionPool.java:203)
> at
> com.datastax.driver.core.HostConnectionPool.borrowConnection(HostConnectionPool.java:107)
> at com.datastax.driver.core.RequestHandler.query(RequestHandler.java:112)
> at
> com.datastax.driver.core.RequestHandler.sendRequest(RequestHandler.java:93)
> at com.datastax.driver.core.Session$Manager.execute(Session.java:513)
> at com.datastax.driver.core.Session$Manager.executeQuery(Session.java:549)
> at com.datastax.driver.core.Session.executeAsync(Session.java:172)
>
> This happens during a big data load process which will do up to 256
> executeAsync's in parallel.
>
> Any ideas? Its not causing huge problems because the operation is just
> retried by our code but it would be nice to eliminate it.
>

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