JSch连接树莓派时无法解析.local主机名的问题求助
2026-6-15
问题：JSch无法通过
.local主机名连接树莓派 我正在使用JSch连接树莓派，目前通过getSession(username, hostname);方法使用IP地址可以正常连接，但树莓派每次重启后IP都会变化。我希望像终端中使用ssh [username]@raspberrypi.local登录那样，在JSch中用[hostname].local或[hostname]代替IP地址，但尝试getSession(username, "raspberrypi");和getSession(username, "raspberrypi.local");均失败，抛出以下错误：
com.jcraft.jsch.JSchException: java.net.UnknownHostException: Unable to resolve host "raspberrypi.local": No address associated with hostname
我确认树莓派处于在线状态（使用IP地址调用getSession(username, ip)可正常连接），本地/etc/resolv.conf输出如下：
#Generated by NetworkManager
nameserver 192.168.0.1
完整错误日志：
2025-01-07 04:13:18.484 7546-8175 System.err com.fyp.ssh W com.jcraft.jsch.JSchException: java.net.UnknownHostException: Unable to resolve host "raspberrypi.local": No address associated with hostname 2025-01-07 04:13:18.484 7546-8175 System.err com.fyp.ssh W at com.jcraft.jsch.Util.createSocket(Util.java:349) 2025-01-07 04:13:18.484 7546-8175 System.err com.fyp.ssh W at com.jcraft.jsch.Session.connect(Session.java:215) 2025-01-07 04:13:18.484 7546-8175 System.err com.fyp.ssh W at com.jcraft.jsch.Session.connect(Session.java:183) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at com.fyp.ssh.MainActivity.executeRemoteCommand(MainActivity.java:82) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at com.fyp.ssh.MainActivity$MyTask.doInBackground(MainActivity.java:60) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at com.fyp.ssh.MainActivity$MyTask.doInBackground(MainActivity.java:47) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at android.os.AsyncTask$3.call(AsyncTask.java:394) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.util.concurrent.FutureTask.run(FutureTask.java:266) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.lang.Thread.run(Thread.java:923) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W Caused by: java.net.UnknownHostException: Unable to resolve host "raspberrypi.local": No address associated with hostname 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:156) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.net.InetAddress.getAllByName(InetAddress.java:1152) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.net.Socket.<init>(Socket.java:218) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at com.jcraft.jsch.Util.createSocket(Util.java:343) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W ... 11 more 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W Caused by: android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at libcore.io.Linux.android_getaddrinfo(Native Method) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:73) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at libcore.io.BlockGuardOs.android_getaddrinfo(BlockGuardOs.java:202) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:73) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:135) 2025-01-07 04:13:18.485 7546-8175 System.err com.fyp.ssh W ... 15 more
内容的提问来源于stack exchange，提问作者yolopoi
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