问题
The source of the error:
io.cdap.cdap.internal.app.runtime.distributed.remote.RemoteExecutionTwillRunnerService#543-runtime-startup-1
The error message:
java.io.IOException: com.jcraft.jsch.JSchException: java.net.ConnectException: Connection timed out (Connection timed out) at io.cdap.cdap.common.ssh.DefaultSSHSession.(DefaultSSHSession.java:82) ~[na:na] at io.cdap.cdap.internal.app.runtime.distributed.remote.RemoteExecutionTwillPreparer.lambda$start$0(RemoteExecutionTwillPreparer.java:429) ~[na:na] at io.cdap.cdap.internal.app.runtime.distributed.remote.RemoteExecutionTwillRunnerService$ControllerFactory.lambda$create$0(RemoteExecutionTwillRunnerService.java:519) ~[na:na] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_212] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_212] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_212] Caused by: com.jcraft.jsch.JSchException: java.net.ConnectException: Connection timed out (Connection timed out) at com.jcraft.jsch.Util.createSocket(Util.java:349) ~[com.jcraft.jsch-0.1.54.jar:na] at com.jcraft.jsch.Session.connect(Session.java:215) ~[com.jcraft.jsch-0.1.54.jar:na] at com.jcraft.jsch.Session.connect(Session.java:183) ~[com.jcraft.jsch-0.1.54.jar:na] at io.cdap.cdap.common.ssh.DefaultSSHSession.(DefaultSSHSession.java:79) ~[na:na] ... 7 common frames omitted Caused by: java.net.ConnectException: Connection timed out (Connection timed out) at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_212] at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_212] at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_212] at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_212] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_212] at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_212] at java.net.Socket.connect(Socket.java:538) ~[na:1.8.0_212] at java.net.Socket.(Socket.java:434) ~[na:1.8.0_212] at java.net.Socket.(Socket.java:211) ~[na:1.8.0_212] at com.jcraft.jsch.Util.createSocket(Util.java:343) ~[com.jcraft.jsch-0.1.54.jar:na] ... 10 common frames omitted
回答1:
This looks like a problem when CDAP tries to ssh to the remote cluster at the start of a program run. This is normally due to firewalls blocking ingress traffic to port 22 and can be fixed by creating a firewall rule that allows it.
See https://cloud.google.com/data-fusion/docs/how-to/create-instance#before_you_begin for more information about steps that should be taken to ensure the Data Fusion instance has the access it needs.
来源：https://stackoverflow.com/questions/56506384/fail-to-start-program-run-program-run