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Users might find a situation when an SSH based job jobs - either from a JS7 - JITL SSHJob template or from using the ssh an SSH command line client - reports report the following problem:
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2023-05-23 11:00:00.009+02:00 [MAIN] [Start] Job=Run_Ide_Check_lists, Agent (url=http://localhost:4445, id=agent_001, name=primaryAgent) 2023-05-23 11:00:00.034+02:00 [STDOUT] [INFO]Job Parameterization: [INFO]Resulting Arguments: [INFO] command=/bin/sleep 120 (source=JOB) [INFO] create_env_vars=true (source=JOB) [INFO] port=22 (source=JOB SSHProviderArguments) [INFO] auth_file=... (source=JOB SSHProviderArguments) [INFO] auth_method=PUBLICKEY (source=JOB SSHProviderArguments) [INFO] host=localhost (source=JOB SSHProviderArguments) [INFO] user=js7 (source=JOB SSHProviderArguments) [INFO][connect]localhost:22 ... [INFO][disconnected]localhost:22 2023-05-23 11:00:00.035+02:00 [MAIN] [End] [Error] returnCode=99, errorState=failed, reason=failed, msg=com.sos.jitl.jobs.ssh.exception.SOSJobSSHException: TransportException: Connection reset java.net.SocketException: Connection reset com.sos.jitl.jobs.ssh.exception.SOSJobSSHException: TransportException: Connection reset java.net.SocketException: Connection reset at com.sos.jitl.jobs.ssh.SSHJob.onOrderProcess(SSHJob.java:167) at com.sos.jitl.jobs.common.ABlockingInternalJob$1.run(ABlockingInternalJob.java:137) at js7.launcher.forjava.internal.BlockingInternalJobAdapter$$anon$1.$anonfun$run$2(BlockingInternalJobAdapter.scala:36) |
The Connection reset error indicates that connection was closed by the server.
The problem might occur more or less frequently with the same job running fine and failing from time to time.
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2023-05-23 11:00:00.034+02:00 [STDOUT] [INFO]Job Parameterization: ... [INFO][connect]localhost:22 ... [INFO][disconnected]localhost:22 2023-05-23 11:00:00.035+02:00 [MAIN] [End] [Error] returnCode=99, errorState=failed, reason=failed, msg=com.sos.jitl.jobs.ssh.exception.SOSJobSSHException: TransportException: Connection reset java.net.SocketException: Connection reset |
This situation The problem does not suggest an error of the job but a limitation of resources with the SSH server.:
- SSH servers typically limit the number of incoming connections from the same source host.
- For example this limit defaults to a maximum of 10 connection connections for OpenSSH.
- Users can increase the limit with the SSH server's configuration.
- For OpenSSH the configuration typically is added to the
/etc/ssh/sshd_configfile by use of the following settings like this:MaxSessions 100MaxStartups 100
- For details check the OpenSSH manual.
- For OpenSSH the configuration typically is added to the
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