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))

[xyy9949]

Hello, I followed the guidance you gave and successfully built the test-server and cas-6023. I also modified the paths of directories and binaries. However, I could not run the test. The error message shows below.
I'm looking forward to your solution! Thank you!

5711 [main] WARN explorer.workload.CassWorkload - === Error with communication to node 0
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:240)
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:86)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1455)
at com.datastax.driver.core.Cluster.init(Cluster.java:158)
at explorer.workload.CassWorkload.executeCql(CassWorkload.java:72)
at explorer.workload.CassWorkload.execute6023(CassWorkload.java:24)
at explorer.workload.CassWorkloadDriver.sendWorkload(CassWorkloadDriver.java:63)
at explorer.SystemRunner.runAll(SystemRunner.java:123)
at explorer.SystemRunner.runAll(SystemRunner.java:76)
at explorer.SystemRunner.main(SystemRunner.java:45)
11270 [main] WARN explorer.workload.CassWorkload - === Error with communication to node 1
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.2:9042 (com.datastax.driver.core.TransportException: [/127.0.0.2:9042] Cannot connect))
at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:240)
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:86)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1455)
at com.datastax.driver.core.Cluster.init(Cluster.java:158)
at explorer.workload.CassWorkload.executeCql(CassWorkload.java:72)
at explorer.workload.CassWorkload.execute6023(CassWorkload.java:28)
at explorer.workload.CassWorkloadDriver.sendWorkload(CassWorkloadDriver.java:63)
at explorer.SystemRunner.runAll(SystemRunner.java:123)
at explorer.SystemRunner.runAll(SystemRunner.java:76)
at explorer.SystemRunner.main(SystemRunner.java:45)
^CException in thread "Thread-1" 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:240)
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:86)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1455)
at com.datastax.driver.core.Cluster.init(Cluster.java:158)
at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:329)
at com.datastax.driver.core.Cluster.connect(Cluster.java:279)
at explorer.verifier.CassVerifier.getValues(CassVerifier.java:48)
at explorer.verifier.CassVerifier.checkDataConsistency(CassVerifier.java:20)
at explorer.verifier.CassVerifier.verify(CassVerifier.java:16)
at explorer.SystemRunner.lambda$runAll$0(SystemRunner.java:103)
at java.base/java.lang.Thread.run(Thread.java:833)

[burcuku]

Hello, do you run the program on a Mac? It runs without any problems in Ubuntu but can have issues connecting to the addresses in Mac.

Could you try running the command below before running the servers?

sudo ifconfig lo0 alias 127.0.0.2 255.255.255.0
sudo ifconfig lo0 alias 127.0.0.3 255.255.255.0

Hope that helps!