我必须更新与我们的Jenkins服务器配合良好的Jenkins从属计算机。更新并重新启动后，Jenkins无法连接到计算机。消息说：
Opening SSH connection to 10.10.10.245:22.
Connection timed out: connect
SSH Connection failed with IOException: "Connection timed out: connect".
java.io.IOException: There was a problem while connecting to 10.10.10.245:22
这是否意味着ssh连接已在从属计算机中关闭，我必须以某种方式重新打开它？