Cannot connect to Cassandra using Astyanax - scala

Question

I am running latest version of cassandra on my mac inside docker. I have installed cassandra dev center on my mac and I can connect to cassandra using devcenter and I can easily query my tables.
http://i.imgur.com/48MztBM.png
http://i.imgur.com/jPKblly.png
I can see that all required ports for cassandra are also open. (as shown below)
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e698e61e3bac cassandra:latest "/docker-entrypoint.s" 9
minutes ago Up 9 minutes 0.0.0.0:7000->7000/tcp, 0.0.0.0:7199-
>7199/tcp, 0.0.0.0:9042->9042/tcp, 0.0.0.0:9160->9160/tcp, 7001/tcp cassandra
I also logged in, into my cassandra container and executed the following commands
root#e698e61e3bac:/# nodetool -h 127.0.0.1 enablethrift
root#e698e61e3bac:/# nodetool -h 127.0.0.1 statusthrift
running
However when I run the code below
val configImpl = new AstyanaxConfigurationImpl()
configImpl.setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
configImpl.setCqlVersion("3.4.2")
configImpl.setTargetCassandraVersion("3.7")
val poolConfig = new ConnectionPoolConfigurationImpl("MyConnectionPool")
poolConfig.setPort(9160)
poolConfig.setMaxConnsPerHost(1)
poolConfig.setSeeds("192.168.1.169")
val context = new AstyanaxContext.Builder()
.forCluster("localhost")
.forKeyspace("movielens_small")
.withAstyanaxConfiguration(configImpl)
.withConnectionPoolConfiguration(poolConfig)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance())
context.start()
val keyspace = context.getClient()
val cf = new ColumnFamily[UUID, String]("cf", UUIDSerializer.get, StringSerializer.get())
val result = keyspace.prepareQuery(cf).withCql("select name from movies").execute()
val data = result.getResult.getRows()
for {
row <- data
col <- row.getColumns
} {
println(col)
}
context.shutdown()
I get the following error
07:32:10,606 INFO ConnectionPoolMBeanManager:53 - Registering mbean: com.netflix.MonitoredResources:type=ASTYANAX,name=MyConnectionPool,ServiceType=connectionpool
07:32:10,625 INFO CountingConnectionPoolMonitor:194 - AddHost: 192.168.1.169
07:32:10,748 INFO CountingConnectionPoolMonitor:194 - AddHost: 172.17.0.2
07:32:10,748 INFO CountingConnectionPoolMonitor:205 - RemoveHost: 192.168.1.169
[error] (run-main-0) com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException: PoolTimeoutException: [host=172.17.0.2(172.17.0.2):9160, latency=2003(2003), attempts=1]Timed out waiting for connection
com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException: PoolTimeoutException: [host=172.17.0.2(172.17.0.2):9160, latency=2003(2003), attempts=1]Timed out waiting for connection
at com.netflix.astyanax.connectionpool.impl.SimpleHostConnectionPool.waitForConnection(SimpleHostConnectionPool.java:231)
at com.netflix.astyanax.connectionpool.impl.SimpleHostConnectionPool.borrowConnection(SimpleHostConnectionPool.java:198)
at com.netflix.astyanax.connectionpool.impl.RoundRobinExecuteWithFailover.borrowConnection(RoundRobinExecuteWithFailover.java:84)
at com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation(AbstractExecuteWithFailoverImpl.java:117)
at com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover(AbstractHostPartitionConnectionPool.java:352)
at com.netflix.astyanax.thrift.AbstractThriftCqlQuery.execute(AbstractThriftCqlQuery.java:41)
at com.abhi.CassandraScanner$.delayedEndpoint$com$abhi$CassandraScanner$1(CassandraScanner.scala:41)
at com.abhi.CassandraScanner$delayedInit$body.apply(CassandraScanner.scala:19)
at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
at scala.App.$anonfun$main$1$adapted(App.scala:76)
at scala.collection.immutable.List.foreach(List.scala:378)
at scala.App.main(App.scala:76)
at scala.App.main$(App.scala:74)

Answer 1

I was able to solve the problem. The problem was with the NodeDiscoveryType. I changed my code to NodeDiscoveryType.NONE and it worked perfectly. Although I still don't understand why its mandatory for the NodeDiscoveryType to be NULL and why it won't work with RING_DESCRIBE.
Hopefully someone will elaborate further.