Starting an CqlKeyspace while all hosts are down results to empty session (Using JavaDriver)

[alextoulps]

Hello,

More specifically in case that all hosts are unavailable in line: https://github.com/Netflix/astyanax/blob/master/astyanax-cql/src/main/java/com/netflix/astyanax/cql/CqlKeyspaceImpl.java#L404 will throw an exception that is not thrown back to the caller but just logged.

com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1:9042 (com.datastax.driver.core.TransportException: [/127.0.0.1:9042] Cannot connect))
at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:227) ~[cassandra-driver-core-2.1.7.1.jar:?]
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:82) ~[cassandra-driver-core-2.1.7.1.jar:?]
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1307) ~[cassandra-driver-core-2.1.7.1.jar:?]
at com.datastax.driver.core.Cluster.init(Cluster.java:159) ~[cassandra-driver-core-2.1.7.1.jar:?]
at com.datastax.driver.core.Cluster.connect(Cluster.java:249) ~[cassandra-driver-core-2.1.7.1.jar:?]
at com.netflix.astyanax.cql.CqlKeyspaceImpl.setHosts(CqlKeyspaceImpl.java:404) [astyanax-cql-3.8.0.jar:3.8.0]

This results the caller to assume that the context is started and try to issue a cql statement resulting to a NPE that is really puzzling.

java.lang.NullPointerException: null
at com.netflix.astyanax.cql.direct.DirectCqlStatement.asPreparedStatement(DirectCqlStatement.java:80)

Moreover the ReconnectionPolicy is not applied because of this.

What are the options to solve this?

• An easy one would be to add NPE checks and try to connect again
• Another one would be to throw a RuntimeException (not elegant)
• Best way seems to use http://docs.datastax.com/en/drivers/java/2.0/com/datastax/driver/core/Cluster.html#newSession() instead.

Or is there another way that that this could work?

Thank you in advance,
Alex

[alextoulps]

#602 Fixed the problem for me