Develop Reference

Connect to an azure iot hub from inside a kubernetes cluster via amqp over websockets

we are trying to communicate to an azure iothub via amqp over websocket from a java docker container inside an azure kubernetes cluster. Sadly it seems, that the container cant establish a connection while locally or even on another virtual machine (where only docker is installed) the container run successfully.
The network policies rules should allow all necessary protocols and ports to communicate with eventhub endpoint of the iot hub.
Does anybody know which switch we have to pull to "allow" the container from the cluster the communication with the iothub?
The only logs we have are this:
13:10:26.688 [main] DEBUG reactor.util.Loggers$LoggerFactory - Using Slf4j logging framework
13:10:26.851 [main] INFO com.azure.messaging.eventhubs.EventHubClientBuilder - connectionId[REDACTED]: Emitting a single connection.
13:10:26.901 [main] DEBUG com.azure.core.amqp.implementation.ReactorConnection - connectionId[REDACTED]: Connection state: UNINITIALIZED
13:10:26.903 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubConnectionProcessor - namespace[REDACTED] entityPath[REDACTED]: Setting next AMQP channel.
13:10:26.903 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubConnectionProcessor - namespace[REDACTED] entityPath[REDACTED]: Next AMQP channel received, updating 0 current subscribers
13:10:26.920 [main] INFO com.azure.core.amqp.implementation.ReactorConnection - connectionId[REDACTED]: Creating and starting connection to REDACTED:443
13:10:26.940 [main] INFO com.azure.core.amqp.implementation.ReactorExecutor - connectionId[REDACTED], message[Starting reactor.]
13:10:26.955 [single-1] INFO com.azure.core.amqp.implementation.handler.ConnectionHandler - onConnectionInit hostname[REDACTED], connectionId[REDACTED]
13:10:26.956 [single-1] INFO com.azure.core.amqp.implementation.handler.ReactorHandler - connectionId[REDACTED] reactor.onReactorInit
13:10:26.956 [single-1] INFO com.azure.core.amqp.implementation.handler.ConnectionHandler - onConnectionLocalOpen hostname[REDACTED:443], connectionId[REDACTED], errorCondition[null], errorDescription[null]
13:10:26.975 [main] DEBUG com.azure.core.amqp.implementation.ReactorSession - Connection state: UNINITIALIZED
13:10:26.991 [main] INFO com.azure.core.amqp.implementation.ReactorConnection - Emitting new response channel. connectionId: REDACTED. entityPath: $management. linkName: mgmt.
13:10:26.991 [main] INFO class com.azure.core.amqp.implementation.RequestResponseChannel<mgmt-session> - namespace[REDACTED] entityPath[$management]: Setting next AMQP channel.
13:10:26.991 [main] INFO class com.azure.core.amqp.implementation.RequestResponseChannel<mgmt-session> - namespace[REDACTED] entityPath[$management]: Next AMQP channel received, updating 0 current subscribers
13:10:26.993 [main] INFO com.azure.messaging.eventhubs.implementation.ManagementChannel - Management endpoint state: UNINITIALIZED
13:10:27.032 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubConnectionProcessor - Upstream connection publisher was completed. Terminating processor.
13:10:27.033 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubConnectionProcessor - namespace[REDACTED] entityPath[REDACTED]: AMQP channel processor completed. Notifying 0 subscribers.
13:10:27.040 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubReactorAmqpConnection - connectionId[REDACTED]: Disposing of connection.
13:10:27.040 [main] INFO class com.azure.core.amqp.implementation.RequestResponseChannel<mgmt-session> - Upstream connection publisher was completed. Terminating processor.
13:10:27.040 [main] INFO class com.azure.core.amqp.implementation.RequestResponseChannel<mgmt-session> - namespace[REDACTED] entityPath[$management]: AMQP channel processor completed. Notifying 0 subscribers.
13:10:27.041 [main] INFO com.azure.core.amqp.implementation.ReactorConnection - connectionId[REDACTED]: Disposing of ReactorConnection.
13:10:27.041 [main] INFO com.azure.messaging.eventhubs.implementation.EventHubConnectionProcessor - namespace[REDACTED] entityPath[REDACTED]: Channel is disposed.
13:10:27.041 [main] INFO com.azure.core.amqp.implementation.ReactorConnection - connectionId[REDACTED]: Removing session 'mgmt-session'
13:10:27.041 [main] INFO com.azure.core.amqp.implementation.ReactorSession - sessionId[mgmt-session]: Disposing of session.
13:10:27.043 [main] INFO com.azure.core.amqp.implementation.AmqpExceptionHandler - Shutdown received: ReactorExecutor.close() was called., isTransient[false], initiatedByClient[true]
13:10:27.089 [single-1] DEBUG com.azure.core.amqp.implementation.handler.SessionHandler - onSessionLocalOpen connectionId[REDACTED], entityName[mgmt-session], condition[Error{condition=null, description='null', info=null}]
13:10:27.090 [single-1] INFO com.azure.core.amqp.implementation.handler.SendLinkHandler - onLinkLocalClose connectionId[REDACTED], linkName[mgmt:sender], errorCondition[null], errorDescription[null]
13:10:27.090 [single-1] INFO com.azure.core.amqp.implementation.handler.ReceiveLinkHandler - onLinkLocalClose connectionId[REDACTED], linkName[mgmt:receiver], errorCondition[null], errorDescription[null]
13:10:27.090 [single-1] DEBUG com.azure.core.amqp.implementation.handler.SessionHandler - onSessionLocalClose connectionId[mgmt-session], entityName[REDACTED], condition[Error{condition=null, description='null', info=null}]
13:10:27.090 [single-1] INFO com.azure.core.amqp.implementation.handler.ConnectionHandler - onConnectionLocalClose hostname[REDACTED:443], connectionId[REDACTED], errorCondition[null], errorDescription[null]
13:10:27.090 [single-1] INFO com.azure.core.amqp.implementation.handler.ConnectionHandler - onConnectionBound hostname[REDACTED], connectionId[REDACTED]
13:10:27.098 [single-1] DEBUG com.azure.core.amqp.implementation.handler.WebSocketsConnectionHandler - connectionId[REDACTED] Adding web sockets transport layer for hostname[REDACTED:443]
13:10:27.125 [single-1] DEBUG com.azure.core.amqp.implementation.handler.DispatchHandler - Running task for event: %s
13:10:27.126 [single-1] INFO com.azure.core.amqp.implementation.ReactorExecutor - connectionId[REDACTED], message[Processing all pending tasks and closing old reactor.]
13:10:27.126 [single-1] DEBUG com.azure.core.amqp.implementation.handler.SendLinkHandler - onLinkLocalOpen connectionId[REDACTED], linkName[mgmt:sender], localTarget[Target{address='$management', durable=NONE, expiryPolicy=SESSION_END, timeout=0, dynamic=false, dynamicNodeProperties=null, capabilities=null}]
13:10:27.126 [single-1] INFO com.azure.core.amqp.implementation.handler.ReceiveLinkHandler - onLinkLocalOpen connectionId[REDACTED], linkName[mgmt:receiver], localSource[Source{address='$management', durable=NONE, expiryPolicy=SESSION_END, timeout=0, dynamic=false, dynamicNodeProperties=null, distributionMode=null, filter=null, defaultOutcome=null, outcomes=null, capabilities=null}]
13:10:27.127 [single-1] INFO com.azure.core.amqp.implementation.ReactorExecutor - connectionId[REDACTED], message[Stopping the reactor because thread was interrupted or the reactor has no more events to process.]

The failure was not the networking at all.
My mistake was, that i assume if i can run the container manual via docker run -it * it should also work in a kubernetes cluster. But with the -it argument the container stays open und and pseudo-tty was attached. But in the kubernetes cluster this of cause will not happen, so we have to adjust the loop logic of the java application and it works after.
Thanks # all

Apache Storm 1.1.0 not running and giving Unable to read additional data from client sessionid

I am running a simple Hello World kind of application in Apache Storm 1.1.0 . Application has a random integer spout and a bolt which prints the tuple output. But somehow I am not able to get it working on my windows system.
I am new to Apache storm and following a tutorial. I have looked for the answers in stack overflow, but i was not able to find any solved question regarding the same.
Following is my run Topology code:
public static void runTopology() {
//String filePath = "./src/main/resources/operations.txt";
TopologyBuilder builder = new TopologyBuilder();
builder.setSpout("randomNumberSpout", new RandomIntSpout());
builder.setBolt("printingBolt", new PrintingBolt()).shuffleGrouping("randomNumberSpout");
Config config = new Config();
config.setDebug(true);
LocalCluster cluster = new LocalCluster();
try{
cluster.submitTopology("Test", config, builder.createTopology());
}finally{
cluster.shutdown();
}
}
Bolt code
public class PrintingBolt extends BaseBasicBolt {
/**
*
*/
private static final long serialVersionUID = 1L;
public void execute(Tuple tuple, BasicOutputCollector basicOutputCollector) {
System.out.println("Printing Tupple!!!!");
System.out.println(tuple);
System.out.println("Tupple processed " + tuple.getInteger(1));
basicOutputCollector.emit(new Values(tuple.getInteger(1)));
}
public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {
outputFieldsDeclarer.declare(new Fields("TestOutput"));
}
}
Spout Code
public class RandomIntSpout extends BaseRichSpout {
/**
*
*/
private static final long serialVersionUID = 1L;
private Random random;
private SpoutOutputCollector outputCollector;
/*#Override
public void open(Map<String,Object> map, TopologyContext topologyContext,
SpoutOutputCollector spoutOutputCollector) {
random = new Random();
outputCollector = spoutOutputCollector;
}*/
public void nextTuple() {
Utils.sleep(1000);
outputCollector.emit(new Values(random.nextInt(), System.currentTimeMillis()));
}
public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {
outputFieldsDeclarer.declare(new Fields("randomInt", "timestamp"));
}
public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
random = new Random();
outputCollector = collector;
}
}
I can provide the rest of the code as well, but I don't think that will be required. If required please mention in comments, I will provide that as well.
I get following error whenever I try to run the application.
10620 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Initiating client connection, connectString=localhost:2000/storm sessionTimeout=20000 > watcher=org.apache.storm.shade.org.apache.curator.ConnectionState#31b0f02
10625 [main-SendThread(0:0:0:0:0:0:0:1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Opening socket connection to server > 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:2000. Will not attempt to authenticate using SASL (unknown error)
10627 [main-SendThread(0:0:0:0:0:0:0:1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Socket connection established to > 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:2000, initiating session
10627 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxnFactory - Accepted socket connection from /> 0:0:0:0:0:0:0:1:56905
10628 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.ZooKeeperServer - Client attempting to establish new session at /> 0:0:0:0:0:0:0:1:56905
10631 [main-SendThread(0:0:0:0:0:0:0:1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Session establishment complete on server > 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:2000, sessionid = 0x16a8e5abd97000d, negotiated timeout = 20000
10631 [SyncThread:0] INFO o.a.s.s.o.a.z.s.ZooKeeperServer - Established session 0x16a8e5abd97000d with negotiated timeout 20000 for client /> 0:0:0:0:0:0:0:1:56905
10632 [main-EventThread] INFO o.a.s.s.o.a.c.f.s.ConnectionStateManager - State change: CONNECTED
10635 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Got user-level KeeperException when processing sessionid:0x16a8e5abd97000d type:create cxid:0x2 zxid:0x26 txntype:-1 reqpath:n/a Error Path:/storm/blobstoremaxkeysequencenumber > Error:KeeperErrorCode = NoNode for /storm/blobstoremaxkeysequencenumber
10655 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
10657 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd97000d
10659 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
10659 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd97000d closed
10661 [main] INFO o.a.s.cluster - setup-path/blobstore/Test-1-1557166474-stormconf.ser/IBMT450PC053RLV.Corp.CVS.com:6627-1
10660 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd97000d, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
10671 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /> 0:0:0:0:0:0:0:1:56905 which had sessionid 0x16a8e5abd97000d
10746 [main] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - Starting
10747 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Initiating client connection, connectString=localhost:2000/storm sessionTimeout=20000 > watcher=org.apache.storm.shade.org.apache.curator.ConnectionState#73893ec1
10755 [main-SendThread(127.0.0.1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2000. Will not > attempt to authenticate using SASL (unknown error)
10756 [main-SendThread(127.0.0.1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Socket connection established to 127.0.0.1/127.0.0.1:2000, initiating > session
10758 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxnFactory - Accepted socket connection from /127.0.0.1:56908
10759 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.ZooKeeperServer - Client attempting to establish new session at > /127.0.0.1:56908
10766 [main-SendThread(127.0.0.1:2000)] INFO o.a.s.s.o.a.z.ClientCnxn - Session establishment complete on server 127.0.0.1/127.0.0.1:2000, > sessionid = 0x16a8e5abd97000e, negotiated timeout = 20000
10766 [SyncThread:0] INFO o.a.s.s.o.a.z.s.ZooKeeperServer - Established session 0x16a8e5abd97000e with negotiated timeout 20000 for client > /127.0.0.1:56908
10767 [main-EventThread] INFO o.a.s.s.o.a.c.f.s.ConnectionStateManager - State change: CONNECTED
10778 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
10781 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd97000e
10785 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd97000e closed
10785 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56908 > which had sessionid 0x16a8e5abd97000e
10785 [main] INFO o.a.s.cluster - setup-path/blobstore/Test-1-1557166474-stormcode.ser/IBMT450PC053RLV.Corp.CVS.com:6627-1
10786 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
10821 [main] INFO o.a.s.d.nimbus - desired replication count 1 achieved, current-replication-count for conf key = 1, current-replication-count > for code key = 1, current-replication-count for jar key = 1
11042 [main] INFO o.a.s.d.nimbus - Activating Test: Test-1-1557166474
11058 [main] INFO o.a.s.d.nimbus - Shutting down master
11064 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11066 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970003
11068 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11069 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd970003, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11068 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970003 closed
11069 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56875 > which had sessionid 0x16a8e5abd970003
11069 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11072 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970004
11074 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11075 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /> 0:0:0:0:0:0:0:1:56878 which had sessionid 0x16a8e5abd970004
11074 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970004 closed
11077 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11079 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970000
11081 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970000 closed
11081 [main] INFO o.a.s.zookeeper - closing zookeeper connection of leader elector.
11082 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11082 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56866 > which had sessionid 0x16a8e5abd970000
11082 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11084 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970001
11086 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970001 closed
11087 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11087 [main] INFO o.a.s.d.nimbus - Shut down master
11087 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11089 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd970001, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11089 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56869 > which had sessionid 0x16a8e5abd970001
11090 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970006
11092 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970006 closed
11093 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11093 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd970006, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11094 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56884 > which had sessionid 0x16a8e5abd970006
11095 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11095 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd970008
11098 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd970008 closed
11098 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11099 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1024,5,main] assignment to null
11099 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1025,5,main] assignment to null
11099 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd970008, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11099 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1026,5,main] assignment to null
11099 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1024,5,main] to be EMPTY, currently EMPTY
11099 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1025,5,main] to be EMPTY, currently EMPTY
11099 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /> 0:0:0:0:0:0:0:1:56890 which had sessionid 0x16a8e5abd970008
11099 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1026,5,main] to be EMPTY, currently EMPTY
11099 [main] INFO o.a.s.d.s.Supervisor - Shutting down supervisor 009e412c-0d39-400c-8302-08296524c703
11100 [Thread-10] INFO o.a.s.e.EventManagerImp - Event manager interrupted
11102 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11103 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd97000a
11105 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd97000a closed
11105 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1027,5,main] assignment to null
11105 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11105 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1028,5,main] assignment to null
11105 [main] INFO o.a.s.d.s.ReadClusterState - Setting Thread[SLOT_1029,5,main] assignment to null
11106 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1027,5,main] to be EMPTY, currently EMPTY
11106 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1028,5,main] to be EMPTY, currently EMPTY
11106 [main] INFO o.a.s.d.s.ReadClusterState - Waiting for Thread[SLOT_1029,5,main] to be EMPTY, currently EMPTY
11106 [main] INFO o.a.s.d.s.Supervisor - Shutting down supervisor 5daf8496-451f-43ca-b176-b16055d6183c
11106 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd97000a, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11106 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /> 0:0:0:0:0:0:0:1:56896 which had sessionid 0x16a8e5abd97000a
11106 [Thread-14] INFO o.a.s.e.EventManagerImp - Event manager interrupted
11108 [Curator-Framework-0] INFO o.a.s.s.o.a.c.f.i.CuratorFrameworkImpl - backgroundOperationsLoop exiting
11109 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Processed session termination for sessionid: > 0x16a8e5abd97000c
11112 [main] INFO o.a.s.s.o.a.z.ZooKeeper - Session: 0x16a8e5abd97000c closed
11112 [main-EventThread] INFO o.a.s.s.o.a.z.ClientCnxn - EventThread shut down
11112 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] WARN o.a.s.s.o.a.z.s.NIOServerCnxn - caught end of stream exception
org.apache.storm.shade.org.apache.zookeeper.server.ServerCnxn$EndOfStreamException: Unable to read additional data from client sessionid > 0x16a8e5abd97000c, likely client has closed socket
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) [storm-core-1.1.0.jar:1.1.0]
at org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) [storm-core-1.1.0.jar:1.1.0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
11113 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxn - Closed socket connection for client /127.0.0.1:56902 > which had sessionid 0x16a8e5abd97000c
11114 [main] INFO o.a.s.testing - Shutting down in process zookeeper
11115 [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2000] INFO o.a.s.s.o.a.z.s.NIOServerCnxnFactory - NIOServerCnxn factory exited run method
11116 [main] INFO o.a.s.s.o.a.z.s.ZooKeeperServer - shutting down
11116 [main] INFO o.a.s.s.o.a.z.s.SessionTrackerImpl - Shutting down
11116 [main] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - Shutting down
11117 [main] INFO o.a.s.s.o.a.z.s.SyncRequestProcessor - Shutting down
11117 [SyncThread:0] INFO o.a.s.s.o.a.z.s.SyncRequestProcessor - SyncRequestProcessor exited!
11117 [ProcessThread(sid:0 cport:-1):] INFO o.a.s.s.o.a.z.s.PrepRequestProcessor - PrepRequestProcessor exited loop!
11117 [main] INFO o.a.s.s.o.a.z.s.FinalRequestProcessor - shutdown of request processor complete
11118 [main] INFO o.a.s.testing - Done shutting down in process zookeeper
11118 [main] INFO o.a.s.testing - Deleting temporary path C:\Users\AKHAND~1\AppData\Local\Temp\ae4119b4-70b3-4d04-9aee-5bfae4c4775b
11203 [main] INFO o.a.s.testing - Deleting temporary path C:\Users\AKHAND~1\AppData\Local\Temp\a78b8c79-b9b3-438d-8df6-5d7bd74281fc
11215 [main] INFO o.a.s.testing - Unable to delete file: > C:\Users\AKHAND~1\AppData\Local\Temp\a78b8c79-b9b3-438d-8df6-5d7bd74281fc\version-2\log.1
11215 [main] INFO o.a.s.testing - Deleting temporary path C:\Users\AKHAND~1\AppData\Local\Temp\0e4fbadc-ad33-4577-9784-4cc163a778fa
11255 [main] INFO o.a.s.testing - Deleting temporary path C:\Users\AKHAND~1\AppData\Local\Temp\456d6b1d-eb21-4b76-98f1-a2bb44b2aa5e
12197 [SessionTracker] INFO o.a.s.s.o.a.z.s.SessionTrackerImpl - SessionTrackerImpl exited loop!
I am not able to understand why client socket is closed and why session is closed? I am not able to get it working. Please help.

I think you might need to add a sleep here
try{
cluster.submitTopology("Test", config, builder.createTopology());
//Sleep here
}finally{
cluster.shutdown();
}
Currently you are submitting the topology, and immediately shutting down. Unless you sleep a bit, your topology doesn't get a chance to run.

Hazelcast web clustered session service: Retrying the connection

hazelcast unable to connect, the message receive is as follows
2018-03-03 10:27:51,074 INFO c.h.i.DefaultAddressPicker [LOCAL] [dev] [3.6] Picked Address[127.0.0.1]:5703, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5703], bind any local is true
2018-03-03 10:28:01.078 INFO 19478 --- [.ensureInstance] c.hazelcast.web.ClusteredSessionService : Retrying the connection!!
2018-03-03 10:28:01,078 INFO c.h.w.ClusteredSessionService Retrying the connection!!
2018-03-03 10:28:01.079 INFO 19478 --- [.ensureInstance] com.hazelcast.config.XmlConfigLocator : Loading 'hazelcast-default.xml' from classpath.
2018-03-03 10:28:01,079 INFO c.h.c.XmlConfigLocator Loading 'hazelcast-default.xml' from classpath.
2018-03-03 10:28:01.085 INFO 19478 --- [.ensureInstance] c.hazelcast.web.HazelcastInstanceLoader : Creating a new HazelcastInstance for session replication
2018-03-03 10:28:01,085 INFO c.h.w.HazelcastInstanceLoader Creating a new HazelcastInstance for session replication
2018-03-03 10:28:01.086 INFO 19478 --- [.ensureInstance] c.h.instance.DefaultAddressPicker : [LOCAL] [dev] [3.6] Picked Address[127.0.0.1]:5703, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5703], bind any local is true

Riak java client, execute() never returns

I've setup a riak server on ubuntu.
http://192.168.0.102:8098/ping return "OK"
I'm trying to remotely connect to it using riak java client(2.1.1) using the following code. client.execute() never returns. I'm attaching the log also.
public class Testing {
public static void main(String[] args) throws ExecutionException,
InterruptedException, UnknownHostException {
RiakClient client = RiakClient.newClient(8098, "192.168.0.102");
// put some stuff
Namespace ns = new Namespace("TestBucket");
Location location = new Location(ns, "TestKey");
String myData = "TestValue";
StoreValue store = new StoreValue.Builder(myData)
.withLocation(location).build();
Response rv = client.execute(store); // << NEVER GETS PAST THIS
System.out.println("write done");
// get some stuff
FetchValue fv = new FetchValue.Builder(location).build();
FetchValue.Response response = client.execute(fv);
String obj = response.getValue(String.class);
System.out.println(obj);
System.out.println("fetch done");
}
}
Log on the console is...
17:19:40.841 [main] DEBUG i.n.u.i.l.InternalLoggerFactory - Using SLF4J as the default logging framework
17:19:40.865 [main] DEBUG i.n.c.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 16
17:19:40.891 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
17:19:40.892 [main] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
17:19:40.893 [main] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
17:19:40.894 [main] DEBUG i.n.util.internal.PlatformDependent0 - direct buffer constructor: available
17:19:40.894 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true
17:19:40.894 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.<init>(long, int): available
17:19:40.896 [main] DEBUG io.netty.util.internal.Cleaner0 - java.nio.ByteBuffer.cleaner(): available
17:19:40.896 [main] DEBUG i.n.util.internal.PlatformDependent - Platform: Windows
17:19:40.897 [main] DEBUG i.n.util.internal.PlatformDependent - Java version: 8
17:19:40.897 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noUnsafe: false
17:19:40.897 [main] DEBUG i.n.util.internal.PlatformDependent - sun.misc.Unsafe: available
17:19:40.898 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noJavassist: false
17:19:40.899 [main] DEBUG i.n.util.internal.PlatformDependent - Javassist: unavailable
17:19:40.899 [main] DEBUG i.n.util.internal.PlatformDependent - You don't have Javassist in your class path or you don't have enough permission to load dynamically generated classes. Please check the configuration for better performance.
17:19:40.899 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.tmpdir: C:\Users\Rakesh\AppData\Local\Temp (java.io.tmpdir)
17:19:40.900 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.bitMode: 32 (sun.arch.data.model)
17:19:40.900 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false
17:19:40.900 [main] DEBUG i.n.util.internal.PlatformDependent - io.netty.maxDirectMemory: 259522560 bytes
17:19:40.921 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false
17:19:40.921 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512
17:19:40.922 [main] DEBUG i.n.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available
17:19:41.039 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.processId: 2924 (auto-detected)
17:19:41.041 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv4Stack: false
17:19:41.041 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv6Addresses: false
17:19:41.162 [main] DEBUG io.netty.util.NetUtil - Loopback interface: lo (Software Loopback Interface 1, 127.0.0.1)
17:19:41.163 [main] DEBUG io.netty.util.NetUtil - \proc\sys\net\core\somaxconn: 200 (non-existent)
17:19:41.321 [main] DEBUG io.netty.channel.DefaultChannelId - -Dio.netty.machineId: e4:b3:18:ff:fe:6c:52:eb (auto-detected)
17:19:41.321 [main] DEBUG i.n.util.internal.ThreadLocalRandom - -Dio.netty.initialSeedUniquifier: 0xb620b93d4006e503
17:19:41.333 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.level: simple
17:19:41.333 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.maxRecords: 4
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numHeapArenas: 2
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numDirectArenas: 2
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.pageSize: 8192
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxOrder: 11
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.chunkSize: 16777216
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.tinyCacheSize: 512
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.smallCacheSize: 256
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.normalCacheSize: 64
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedBufferCapacity: 32768
17:19:41.355 [main] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimInterval: 8192
17:19:41.364 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: pooled
17:19:41.365 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 65536
17:19:41.365 [main] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384
17:19:41.406 [main] INFO com.basho.riak.client.core.RiakNode - RiakNode started; 192.168.0.102:8098
17:19:41.407 [main] INFO c.basho.riak.client.core.RiakCluster - RiakCluster is starting.
17:19:41.408 [main] INFO c.b.r.c.core.util.DefaultCharset - No desired charset found in system properties, the default charset 'windows-1252' will be used
17:19:41.408 [main] INFO c.b.r.c.core.util.DefaultCharset - Initializing client charset to: windows-1252
17:19:41.443 [main] DEBUG com.basho.riak.client.core.RiakNode - Attempting to acquire channel permit
17:19:41.445 [main] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxCapacityPerThread: 32768
17:19:41.445 [main] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.maxSharedCapacityFactor: 2
17:19:41.445 [main] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.linkCapacity: 16
17:19:41.445 [main] DEBUG io.netty.util.Recycler - -Dio.netty.recycler.ratio: 8
17:19:41.447 [main] DEBUG com.basho.riak.client.core.RiakNode - Operation 28144878 being executed on RiakNode 192.168.0.102:8098
17:19:41.461 [nioEventLoopGroup-2-10] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.bytebuf.checkAccessible: true
17:19:41.463 [nioEventLoopGroup-2-10] DEBUG i.n.util.ResourceLeakDetectorFactory - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector#1536e36
Call stack of suspended thread
Thread [main] (Suspended)
Unsafe.park(boolean, long) line: not available [native method]
LockSupport.park(Object) line: not available
CountDownLatch$Sync(AbstractQueuedSynchronizer).parkAndCheckInterrupt() line: not available
CountDownLatch$Sync(AbstractQueuedSynchronizer).doAcquireSharedInterruptibly(int) line: not available
CountDownLatch$Sync(AbstractQueuedSynchronizer).acquireSharedInterruptibly(int) line: not available
CountDownLatch.await() line: not available
StoreOperation(FutureOperation<T,U,S>).await() line: 387
GenericRiakCommand$1(CoreFutureAdapter<T2,S2,T,S>).await() line: 90
StoreValue(RiakCommand<T,S>).execute(RiakCluster) line: 92
RiakClient.execute(RiakCommand<T,S>) line: 355
Testing.main(String[]) line: 29

A simple code addition after the following line of your code should fix things for you:
response rv = client.execute(store);
add:
client.shutdown();
to release that connection and continue execution.
Note that you will need to create a new connection for your next request against the database since you closed client or use .executeAsync() in place of .execute().

It appears you are expecting the Riak java client to connect using HTTP API. The Riak java client only connects using protocol buffer; using the HTTP address and port will freeze.

Yoy have to use this, its works fine...
public static void main(String[] args) throws ExecutionException,
InterruptedException, UnknownHostException {
RiakClient client = RiakClient.newClient(8087,"192.168.0.65");
// put some stuff
Namespace ns = new Namespace("TestBucket");
Location location = new Location(ns, "TestKey");
String myData = "TestValue";
StoreValue store = new StoreValue.Builder(myData)
.withLocation(location).build();
client.execute(store); // << NEVER GETS PAST THIS
System.out.println("write done");
// get some stuff
FetchValue fv = new FetchValue.Builder(location).build();
FetchValue.Response response = client.execute(fv);
String obj = response.getValue(String.class);
System.out.println(obj);
System.out.println("fetch done");
}
hope you will also get... !!!

Cassandra Java Driver Cold to Hot in 500ms?

I experience a cold to hot (first use) of cluster and session to a local data source (Cassandra) to take 640ms. Any additional connect takes 80 to 100ms so the overhead of the first connect is about 500+ms. Is that normal and is there anything I can do to get this figure down somehow? I use a T410 (i5 2.5GHz).
[Update]
23:27:11.453 [main] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NEW_NODE_DELAY_SECONDS is undefined, using default value 1
23:27:11.460 [main] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NON_BLOCKING_EXECUTOR_SIZE is undefined, using default value 4
23:27:11.463 [main] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NOTIF_LOCK_TIMEOUT_SECONDS is undefined, using default value 60
23:27:11.607 [main] DEBUG com.datastax.driver.core.Cluster - Starting new cluster with contact points [localhost/127.0.0.1:9042]
23:27:11.905 [main] DEBUG com.datastax.driver.core.Connection - Connection[localhost/127.0.0.1:9042-1, inFlight=0, closed=false] Transport initialized and ready
23:27:11.906 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing node list and token map
23:27:11.969 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing schema
23:27:12.016 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing node list and token map
23:27:12.051 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Successfully connected to localhost/127.0.0.1:9042
23:27:12.052 [main] INFO c.d.d.c.p.DCAwareRoundRobinPolicy - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
23:27:12.053 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host localhost/127.0.0.1:9042 added
23:27:12.076 [Cassandra Java Driver worker-0] DEBUG com.datastax.driver.core.Connection - Connection[localhost/127.0.0.1:9042-2, inFlight=0, closed=false] Transport initialized and ready
23:27:12.077 [Cassandra Java Driver worker-0] DEBUG com.datastax.driver.core.Session - Added connection pool for localhost/127.0.0.1:9042
23:27:12.097 [main] DEBUG com.datastax.driver.core.Connection - Connection[localhost/127.0.0.1:9042-2, inFlight=0, closed=true] closing connection
23:27:12.103 [main] DEBUG com.datastax.driver.core.Cluster - Shutting down
23:27:12.105 [main] DEBUG com.datastax.driver.core.Connection - Connection[localhost/127.0.0.1:9042-1, inFlight=0, closed=true] closing connection
23:27:12.123 [main] DEBUG com.datastax.driver.core.Cluster - Starting new cluster with contact points [/127.0.0.1:9042]
23:27:12.132 [main] DEBUG com.datastax.driver.core.Connection - Connection[/127.0.0.1:9042-1, inFlight=0, closed=false] Transport initialized and ready
23:27:12.132 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing node list and token map
23:27:12.138 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing schema
23:27:12.168 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Refreshing node list and token map
23:27:12.192 [main] DEBUG c.d.driver.core.ControlConnection - [Control connection] Successfully connected to /127.0.0.1:9042
23:27:12.192 [main] INFO c.d.d.c.p.DCAwareRoundRobinPolicy - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
23:27:12.192 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host /127.0.0.1:9042 added
23:27:12.201 [Cassandra Java Driver worker-0] DEBUG com.datastax.driver.core.Connection - Connection[/127.0.0.1:9042-2, inFlight=0, closed=false] Transport initialized and ready
23:27:12.202 [Cassandra Java Driver worker-0] DEBUG com.datastax.driver.core.Session - Added connection pool for /127.0.0.1:9042
As one can see the first connection attempt uses up to 600ms and more depending how one might read the figures.

My guess is this has to do with connection initialization. In all currently released versions of the java driver connections are initialized 1 after another synchronously. Fortunately, individual host pools are initialized in parallel, but the connections are not. If you are using 2.0.9, which has a default # of core connections of 8 that could explain why you are seeing slow initialization times. Also if you are using password authentication, that will slow things down quite a bit as well (from ~0-10ms per connection to ~60-120ms).
In java driver 2.0.10, which will be released soon, all connections are initialized in parallel which greatly improves Session initialization. For information see JAVA-701.