I am connecting to MongoDB while using the Scala Play! framework. I end up getting this timeout error:
! #6j672dke5 - Internal server error, for (GET) [/accounts] ->
play.api.Application$$anon$1: Execution exception[[MongoTimeoutException: Timed out while waiting to connect after 10000 ms]]
at play.api.Application$class.handleError(Application.scala:293) ~[play_2.10-2.2.1.jar:2.2.1]
at play.api.DefaultApplication.handleError(Application.scala:399) [play_2.10-2.2.1.jar:2.2.1]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$12$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:165) [play_2.10-2.2.1.jar:2.2.1]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$12$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:162) [play_2.10-2.2.1.jar:2.2.1]
at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33) [scala-library-2.10.4.jar:na]
at scala.util.Failure$$anonfun$recover$1.apply(Try.scala:185) [scala-library-2.10.4.jar:na]
Caused by: com.mongodb.MongoTimeoutException: Timed out while waiting to connect after 10000 ms
at com.mongodb.BaseCluster.getDescription(BaseCluster.java:131) ~[mongo-java-driver-2.12.3.jar:na]
at com.mongodb.DBTCPConnector.getClusterDescription(DBTCPConnector.java:396) ~[mongo-java-driver-2.12.3.jar:na]
at com.mongodb.DBTCPConnector.getType(DBTCPConnector.java:569) ~[mongo-java-driver-2.12.3.jar:na]
at com.mongodb.DBTCPConnector.isMongosConnection(DBTCPConnector.java:370) ~[mongo-java-driver-2.12.3.jar:na]
at com.mongodb.Mongo.isMongosConnection(Mongo.java:645) ~[mongo-java-driver-2.12.3.jar:na]
at com.mongodb.DBCursor._check(DBCursor.java:454) ~[mongo-java-driver-2.12.3.jar:na]
Here is my Scala code for connecting to the database:
//models.scala
package models.mongodb
//imports
package object mongoContext {
//context stuff
val client = MongoClient(current.configuration.getString("mongo.host").toString())
val database = client(current.configuration.getString("mongo.database").toString())
}
Here is the actual model that is making the connection:
//google.scala
package models.mongodb
//imports
case class Account(
id: ObjectId = new ObjectId,
name: String
)
object AccountDAO extends SalatDAO[Account, ObjectId](
collection = mongoContext.database("accounts")
)
object Account {
def all(): List[Account] = AccountDAO.find(MongoDBObject.empty).toList
}
Here's the Play! framework MongoDB conf information:
# application.conf
# mongodb connection details
mongo.host="localhost"
mongo.port=27017
mongo.database="advanced"
Mongodb is running on my local machine. I can connect to it by typing mongo at the terminal window. Here's the relevant part of the conf file:
# mongod.conf
# Where to store the data.
# Note: if you run mongodb as a non-root user (recommended) you may
# need to create and set permissions for this directory manually,
# e.g., if the parent directory isn't mutable by the mongodb user.
dbpath=/var/lib/mongodb
#where to log
logpath=/var/log/mongodb/mongod.log
logappend=true
#port = 27017
# Listen to local interface only. Comment out to listen on all interfaces.
#bind_ip = 127.0.0.1
So what's causing this timeout error and how do I fix it? Thanks!
I figured out that I needed to change:
val client = MongoClient(current.configuration.getString("mongo.host").toString())
val database = client(current.configuration.getString("mongo.database").toString())
to:
val client = MongoClient(conf.getString("mongo.host"))
val database = client(conf.getString("mongo.database"))
Related
I have a connection problem with Cloud Sql Postgres from my Flask Rest API app.
I have a db.py file:
import os
from flask_sqlalchemy import SQLAlchemy
import sqlalchemy
db = SQLAlchemy()
def connect_unix_socket() -> sqlalchemy.engine.base.Engine:
""" Initializes a Unix socket connection pool for a Cloud SQL instance of Postgres. """
# Note: Saving credentials in environment variables is convenient, but not
# secure - consider a more secure solution such as
# Cloud Secret Manager (https://cloud.google.com/secret-manager) to help
# keep secrets safe.
db_user = os.environ["DB_USER"] # e.g. 'my-database-user'
db_pass = os.environ["DB_PASS"] # e.g. 'my-database-password'
db_name = os.environ["DB_NAME"] # e.g. 'my-database'
unix_socket_path = os.environ["INSTANCE_UNIX_SOCKET"] # e.g. '/cloudsql/project:region:instance'
pool = sqlalchemy.create_engine(
# Equivalent URL:
# postgresql+pg8000://<db_user>:<db_pass>#/<db_name>
# ?unix_sock=<INSTANCE_UNIX_SOCKET>/.s.PGSQL.5432
# Note: Some drivers require the `unix_sock` query parameter to use a different key.
# For example, 'psycopg2' uses the path set to `host` in order to connect successfully.
sqlalchemy.engine.url.URL.create(
drivername="postgresql+pg8000",
username=db_user,
password=db_pass,
database=db_name,
query={"unix_sock": "{}/.s.PGSQL.5432".format(unix_socket_path)},
),
# [START_EXCLUDE]
# Pool size is the maximum number of permanent connections to keep.
pool_size=5,
# Temporarily exceeds the set pool_size if no connections are available.
max_overflow=2,
# The total number of concurrent connections for your application will be
# a total of pool_size and max_overflow.
# 'pool_timeout' is the maximum number of seconds to wait when retrieving a
# new connection from the pool. After the specified amount of time, an
# exception will be thrown.
pool_timeout=30, # 30 seconds
# 'pool_recycle' is the maximum number of seconds a connection can persist.
# Connections that live longer than the specified amount of time will be
# re-established
pool_recycle=1800, # 30 minutes
# [END_EXCLUDE]
)
return pool
I import the db.py file in my app.py file:
import os
import sqlalchemy
from flask import Flask
from flask_smorest import Api
from flask_sqlalchemy import SQLAlchemy
from db import db, connect_unix_socket
import models
from resources.user import blp as UserBlueprint
# pylint: disable=C0103
app = Flask(__name__)
def init_connection_pool() -> sqlalchemy.engine.base.Engine:
# use a Unix socket when INSTANCE_UNIX_SOCKET (e.g. /cloudsql/project:region:instance) is defined
if unix_socket_path:
return connect_unix_socket()
raise ValueError(
"Missing database connection type. Please define one of INSTANCE_HOST, INSTANCE_UNIX_SOCKET, or INSTANCE_CONNECTION_NAME"
)
db = None
#app.before_first_request
def init_db() -> sqlalchemy.engine.base.Engine:
global db
db = init_connection_pool()
api = Api(app)
#app.route("/api")
def user_route():
return "Welcome user API!"
api.register_blueprint(UserBlueprint)
if __name__ == '__main__':
server_port = os.environ.get('PORT', '8080')
app.run(debug=True, port=server_port, host='0.0.0.0')
The app run correctly, when i call the end point to Get or Post users, the app crash and give me this error:
"The current Flask app is not registered with this 'SQLAlchemy'"
RuntimeError: The current Flask app is not registered with this 'SQLAlchemy' instance. Did you forget to call 'init_app', or did you create multiple 'SQLAlchemy' instances?
This is my User.py class:
from sqlalchemy.exc import SQLAlchemyError, IntegrityError
from db import db
from models import UserModel
from schemas import UserSchema
blp = Blueprint("Users", "users", description="Operations on users")
#blp.route("/user/<string:user_id>")
class User(MethodView):
#blp.response(200, UserSchema)
def get(self, user_id):
user = UserModel.query.get_or_404(user_id)
return user
def delete(self, user_id):
user = UserModel.query.get_or_404(user_id)
db.session.delete(user)
db.session.commit()
return {"message": "User deleted"}, 200
#blp.route("/user")
class UserList(MethodView):
#blp.response(200, UserSchema(many=True))
def get(self):
return UserModel.query.all()
How i can fix this issue?
#dev_ Your issue is that your are trying to intermingle the use of SQLAlchemy Core with SQLAlchemy ORM as if they are the same thing, leading to your issues. SQLAlchemy connection pools created using sqlalchemy.create_engine use the CORE API while Flask-SQLAlchemy uses the SQLAlchemy ORM model. This is the core reason for you issue. It is easier to use one or the other.
I would recommend using purely Flask-SQLALchemy with the use of the cloud-sql-python-connector library for your use-case. It will make your life much easier.
For simplicity, I am getting rid of your db.py leading to your app.py file being as follows:
from flask import Flask
from flask_smorest import Api
from flask_sqlalchemy import SQLAlchemy
from google.cloud.sql.connector import Connector, IPTypes
from resources.user import blp as UserBlueprint
# load env vars
db_user = os.environ["DB_USER"] # e.g. 'my-database-user'
db_pass = os.environ["DB_PASS"] # e.g. 'my-database-password'
db_name = os.environ["DB_NAME"] # e.g. 'my-database'
instance_connection_name = os.environ["INSTANCE_CONNECTION_NAME"] # e.g. 'project:region:instance'
# Python Connector database connection function
def getconn():
with Connector() as connector:
conn = connector.connect(
instance_connection_name, # Cloud SQL Instance Connection Name
"pg8000",
user=db_user,
password=db_pass,
db=db_name,
ip_type= IPTypes.PUBLIC # IPTypes.PRIVATE for private IP
)
return conn
app = Flask(__name__)
# configure Flask-SQLAlchemy to use Python Connector
app.config['SQLALCHEMY_DATABASE_URI'] = "postgresql+pg8000://"
app.config['SQLALCHEMY_ENGINE_OPTIONS'] = {
"creator": getconn
}
# initialize db (using app!)
db = SQLAlchemy(app)
# rest of your code
api = Api(app)
# ...
Hope this helps resolve your issue!
I have a Mongo DB Docker container running on 192.168.0.229. From another computer, I can access it via:
> mongo "mongodb://192.168.0.229:27017/test"
But when I add that configuration string (host="192.168.0.229") to my Play Framework app, I get a timeout error:
[debug] application - Login Form Success: UserData(larry#gmail.com,testPW)
[error] p.a.h.DefaultHttpErrorHandler -
! #7m7kggikl - Internal server error, for (POST) [/] ->
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[TimeoutException: Future timed out after [30 seconds]]]
In the past, the connection was successful with host="localhost" and even an Atlas cluster (host="mycluster.gepld.mongodb.net") for the hostname, so there were no problems connecting previously with the same code. For some reason, Play Framework does not want to connect to this endpoint!
Could it be because the hostname is an IP address? Or, maybe Play/ Akka is doing something under the covers to stop the connection (or something to make Mongo/Docker refuse to accept it?)?
I'm using this driver:
"org.mongodb.scala" %% "mongo-scala-driver" % "4.4.0"
Perhaps I should switch to the Reactive Scala Driver? Any help would be appreciated.
Clarifications:
The Mongo DB Docker container is running on a linux machine on my local network. This container is reachable from within my local network at 192.168.0.229. The goal is to set my Play Framework app configuration to point to the DB at this address, so that as long as the Docker container is running, I can develop from any computer on my local network. Currently, I am able to access the container through the mongo shell on any computer:
> mongo "mongodb://192.168.0.229:27017/test"
I have a Play Framework app with the following in the Application.conf:
datastore {
# Dev
host: "192.168.0.229"
port: 27017
dbname: "test"
user: ""
password: ""
}
This data is used in a connection helper file called DataStore.scala:
package model.db.mongo
import org.mongodb.scala._
import utils.config.AppConfiguration
trait DataStore extends AppConfiguration {
lazy val dbHost = config.getString("datastore.host")
lazy val dbPort = config.getInt("datastore.port")
lazy val dbUser = getConfigString("datastore.user", "")
lazy val dbName = getConfigString("datastore.dbname", "")
lazy val dbPasswd = getConfigString("datastore.password", "")
//MongoDB Atlas Method (Localhost if DB User is empty)
val uri: String = s"mongodb+srv://$dbUser:$dbPasswd#$dbHost/$dbName?retryWrites=true&w=majority"
//val uri: String = "mongodb+svr://192.168.0.229:27017/?compressors=disabled&gssapiServiceName=mongodb"
System.setProperty("org.mongodb.async.type", "netty")
val mongoClient: MongoClient = if (getConfigString("datastore.user", "").isEmpty()) MongoClient() else MongoClient(uri)
print(mongoClient.toString)
print(mongoClient.listDatabaseNames())
val database: MongoDatabase = mongoClient.getDatabase(dbName)
def close = mongoClient.close() //Do this when logging out
}
When you start the app, you open localhost:9000 which is simply a login form. When you fill out the data that corresponds with the data in the users collection, the Play app times out:
[error] p.a.h.DefaultHttpErrorHandler -
! #7m884abc4 - Internal server error, for (POST) [/] ->
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[TimeoutException: Future timed out after [30 seconds]]]
at play.api.http.HttpErrorHandlerExceptions$.$anonfun$convertToPlayException$2(HttpErrorHandler.scala:381)
at scala.Option.map(Option.scala:242)
at play.api.http.HttpErrorHandlerExceptions$.convertToPlayException(HttpErrorHandler.scala:380)
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:373)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:264)
at play.core.server.AkkaHttpServer$$anonfun$2.applyOrElse(AkkaHttpServer.scala:430)
at play.core.server.AkkaHttpServer$$anonfun$2.applyOrElse(AkkaHttpServer.scala:422)
at scala.concurrent.impl.Promise$Transformation.run(Promise.scala:454)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:63)
at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:100)
Caused by: java.util.concurrent.TimeoutException: Future timed out after [30 seconds]
at scala.concurrent.impl.Promise$DefaultPromise.tryAwait0(Promise.scala:212)
at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:225)
at scala.concurrent.Await$.$anonfun$result$1(package.scala:201)
at akka.dispatch.MonitorableThreadFactory$AkkaForkJoinWorkerThread$$anon$3.block(ThreadPoolBuilder.scala:174)
at java.base/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3118)
at akka.dispatch.MonitorableThreadFactory$AkkaForkJoinWorkerThread.blockOn(ThreadPoolBuilder.scala:172)
at akka.dispatch.BatchingExecutor$BlockableBatch.blockOn(BatchingExecutor.scala:116)
at scala.concurrent.Await$.result(package.scala:124)
at model.db.mongo.DataHelpers$ImplicitObservable.headResult(DataHelpers.scala:27)
at model.db.mongo.DataHelpers$ImplicitObservable.headResult$(DataHelpers.scala:27)
The call to the Users collection is defined in UserAccounts.scala:
case class UserAccount(_id: String, fullname: String, username: String, password: String)
object UserAccount extends DataStore {
val logger: Logger = Logger("database")
//Required for using Case Classes
val codecRegistry = fromRegistries(fromProviders(classOf[UserAccount]), DEFAULT_CODEC_REGISTRY)
//Using Case Class to get a collection
val coll: MongoCollection[UserAccount] = database.withCodecRegistry(codecRegistry).getCollection("users")
//Using Document to get a collection
val listings: MongoCollection[Document] = database.getCollection("users")
def isValidLogin(username: String, password: String): Boolean = {
findUser(username) match {
case Some(u: UserAccount) => if(password.equals(u.password)) { true } else {false }
case None => false
}
}
Just an FYI if anyone runs into this problem. I had a bad line in my DataStore.scala file:
val mongoClient: MongoClient = if (getConfigString("datastore.user", "").isEmpty()) MongoClient() else MongoClient(uri)
Since I was trying to connect without a username (there's no auth on my test db), the above line was saying, "If there's no username, you must be trying to connect to the default MongoClient() location, which is localhost". My mistake.
I simply changed the above line to this:
val mongoClient: MongoClient = MongoClient(uri)
I am running my DSE Graph inside a Docker container with this command.
docker run -e DS_LICENSE=accept -p 9042:9042 --name my-dse -d datastax/dse-server -g -k -s
On my Scala Code I am referencing it as follows
object GrDbConnection {
val dseCluster = DseCluster.builder()
.addContactPoints("127.0.0.1").withPort(9042)
.build()
val graphName = "graphName"
val graphOptions = new GraphOptions()
.setGraphName(graphName)
var graph:ScalaGraph = null
try {
val session = dseCluster.connect()
// The following uses the DSE graph schema API, which is currently only supported by the string-based
// execution interface. Eventually there will be a programmatic API for making schema changes, but until
// then this needs to be used.
// Create graph
session.executeGraph("system.graph(name).ifNotExists().create()", ImmutableMap.of("name", graphName))
// Clear the schema to drop any existing data and schema
session.executeGraph(new SimpleGraphStatement("schema.clear()").setGraphName(graphName))
// Note: typically you would not want to use development mode and allow scans, but it is good for convenience
// and experimentation during development.
// Enable development mode and allow scans
session.executeGraph(new SimpleGraphStatement("schema.config().option('graph.schema_mode').set('development')")
.setGraphName(graphName))
session.executeGraph(new SimpleGraphStatement("schema.config().option('graph.allow_scan').set('true')")
.setGraphName(graphName))
// Create a ScalaGraph from a remote Traversal Source using withRemote
// See: http://tinkerpop.apache.org/docs/current/reference/#connecting-via-remotegraph for more details
val connection = DseRemoteConnection.builder(session)
.withGraphOptions(graphOptions)
.build()
graph = EmptyGraph.instance().asScala
.configure(_.withRemote(connection))
} finally {
dseCluster.close()
}
}
Then In one of my controllers I have used this to invoke a query to the DSE Graph.
def test = Action {
val r = GrDbConnection.graph.V().count()
print(r.iterate())
Ok
}
This returns an error
lay.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[NoHostAvailableException: All host(s) tried for query failed (no host was tried)]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:251)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:178)
at play.core.server.AkkaHttpServer$$anonfun$1.applyOrElse(AkkaHttpServer.scala:363)
at play.core.server.AkkaHttpServer$$anonfun$1.applyOrElse(AkkaHttpServer.scala:361)
at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:413)
at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:91)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (no host was tried)
at com.datastax.driver.core.RequestHandler.reportNoMoreHosts(RequestHandler.java:221)
at com.datastax.driver.core.RequestHandler.access$1000(RequestHandler.java:41)
at com.datastax.driver.core.RequestHandler$SpeculativeExecution.findNextHostAndQuery(RequestHandler.java:292)
at com.datastax.driver.core.RequestHandler.startNewExecution(RequestHandler.java:109)
at com.datastax.driver.core.RequestHandler.sendRequest(RequestHandler.java:89)
at com.datastax.driver.core.SessionManager.executeAsync(SessionManager.java:124)
at com.datastax.driver.dse.DefaultDseSession.executeGraphAsync(DefaultDseSession.java:123)
at com.datastax.dse.graph.internal.DseRemoteConnection.submitAsync(DseRemoteConnection.java:74)
at org.apache.tinkerpop.gremlin.process.remote.traversal.step.map.RemoteStep.promise(RemoteStep.java:89)
at org.apache.tinkerpop.gremlin.process.remote.traversal.step.map.RemoteStep.processNextStart(RemoteStep.java:65)
Turns out all I needed to do was to remove
finally {
dseCluster.close()
}
Am trying to get my hands on elastic4s by one of the samples as given
here
But I keep getting the below exception when am trying to connect through TcpClient.transport :
Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{IFyYWnE_S4aHRVxT9v60LQ}{dockerhost}{192.168.99.100:9300}]]
Am trying to connect to an elastic instance on docker, elastic version is 2.3.4
Here is my code below dependencies.
import com.sksamuel.elastic4s.{ElasticClient, ElasticsearchClientUri, TcpClient}
import org.elasticsearch.action.support.WriteRequest.RefreshPolicy
import org.elasticsearch.common.settings.Settings
import com.sksamuel.elastic4s.ElasticDsl._
object Main extends App {
//val settings = Settings.builder().put("cluster.name", "elasticsearch").build()
val client = TcpClient.transport(ElasticsearchClientUri("elasticsearch://dockerhost:9300"))
client.execute {
bulk(
indexInto("myindex" / "mytype").fields("country" -> "Mongolia", "capital" -> "Ulaanbaatar"),
indexInto("myindex" / "mytype").fields("country" -> "Namibia", "capital" -> "Windhoek")
).refresh(RefreshPolicy.WAIT_UNTIL)
}.await
val result = client.execute {
search("myindex").matchQuery("capital", "ulaanbaatar")
}.await
println(result.hits.head.sourceAsString)
client.close()
}
build.gradle:
compile group: 'com.sksamuel.elastic4s', name: 'elastic4s-core_2.11', version: '5.4.9'
compile group: 'com.sksamuel.elastic4s', name: 'elastic4s-tcp_2.11', version: '5.4.9'
compile group: 'com.sksamuel.elastic4s', name: 'elastic4s-http_2.11', version: '5.4.9'
compile group: 'com.sksamuel.elastic4s', name: 'elastic4s-streams_2.11', version: '5.4.9'
Any help regarding this issue would be helpful.
I am asked this question a lot, and 99% of the time, the answer to this question is
The cluster name is not the default (elasticsearch) and therefore it must be specified in the connection string.
The server is not setup to listen outside of localhost. https://www.elastic.co/blog/elasticsearch-unplugged
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)
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.